LXX International conference "NUCLEUS – 2020. Nuclear physics and elementary particle physics. Nuclear physics technologies"

Session

Section 2. Experimental and theoretical studies of nuclear reactions

12 Oct 2020, 15:30

Online

54. Electron Screening in nuclear reactions at low energies

Aleksandra Cvetinović

12/10/2020, 15:30

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

In nuclear reactions induced by low-energy charged particles, atomic electrons can participate in the process by screening the nuclear charge and so, effectively reduce the repulsive Coulomb barrier. Consequently, the measured cross section is enhanced by an effect called electron screening. In numerous experiments, different research groups [1-4] obtained extremely high values of electron...

369. Astrophysical production of p nuclides in the fast proton induced p - processes

Dr Ioan Alexandru Oprea (FLNP JINR Dubna)

12/10/2020, 16:20

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The fast proton induced p – processes reactions play a key role in the astrochemical elements yields of the big bang nucleosynthesis for standard cosmology. Astrophysical concurrence of several p - process mechanisms in the production of p – nuclei was analyzed for proton energy up to 25 MeV.
Cross sections of proton induced reactions and contribution of each nuclear reaction mechanism for...

21. Hoyle state and unstable nuclei in relativistic nuclei dissociation

Andrei Zaitsev (Joint Institute for Nuclear Research)

12/10/2020, 16:45

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The phenomenon of dissociation of relativistic nuclei observed with a unique completeness in the nuclear track emulsion (NTE) makes it possible to study ensembles of nucleons and lightest nuclei of interest to nuclear cluster physics and astrophysics [1]. The advantages of the NTE technique include a record space resolution in determining emission angles for recognition relativistic ${}^{8}$Be...

199. POSSIBLE HALO STATES IN ${}^{12}$N

Dr Andrey Danilov (NRC "Kurchatov Institute")

13/10/2020, 14:40

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Experiment was done by our group on $^{12}$C($^{3}$He,t)$^{12}$N reaction. The measurements were conducted at the University of Jyväskylä (Finland) using the K130 cyclotron to produce a $^{3}$He beam at E($^{3}$He)=40 MeV. The 150 cm diameter Large Scattering Chamber was equipped with three ΔE-E detector telescopes, each containing two independent ΔE detectors and one common E detector. So...

154. INVESTIGATIONS OF THE EXCITED STATES OF 1P SHELL NUCLEI IN INTERACTION WITH DEUTERONS AT LOW ENERGIES

Daniyar Janseitov (Joint Institute for Nuclear Research)

13/10/2020, 15:05

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The differential cross-sections of the elastic and inelastic d + $^{13}$C scattering were measured at E(d)=14.5 and 18 MeV on U150M cyclotron of Institute of Nuclear Physics (Almaty, Kazakhstan).

The first 3.09 MeV $(1/2^{+})$ excited state of $^{13}$C nucleus is of special interest because, it is a state with increased radius, where we can talk about a neutron halo-like...

113. Extraction of $nn$-scattering length in $nd$-breakup reaction at neutron energy of 10-80 MeV

Eugene Konobeevski (Institute for Nuclear Research, Russian Academy of Sciences, Moscow)

13/10/2020, 15:30

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

One of the main few-body reactions, in which data on nn-interaction are obtained, is the nd-breakup reaction n + $^2$H → n + n + p. However, the data on main nn interaction parameter - nn scattering length, extracted from this reaction at different energies, have a large scatter of values that exceeds the experimental errors. In [1], it was assumed that this dispersion is...

97. Extraction of singlet $pp$-virtual state energy in $d + ^{1}$H$ → p + p + n$ reaction

Viacheslav Mitcuk (Institute for Nuclear Research, Russian Academy of Sciences, Moscow; Moscow Institute of Physics and Technology, Moscow)

13/10/2020, 15:55

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Earlier in [1], it was suggested that the reason of discrepancies in experimental $a_{nn}$ values (from –16 to –22 fm) may be connected to a large effect of $3N$ forces. It can also be assumed that the values of the proton-proton scattering length $a_{pp}$ and the energy of the virtual $^{1}S_{0}$ state $E_{pp}$ extracted from the experiment with three particles in the final state will differ...

51. Angular dependencies of the deuteron analyzing powers in dp- elastic scattering at large transverse momenta

Dr Vladimir Ladygin (JINR)

13/10/2020, 16:35

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The results on the vector Ay and
tensor Ayy and Axx analyzing powers in deuteron-proton
elastic scattering at large transverse momenta are presented.
These data were obtained at internal target at JINR Nuclotron
in the energy range 400-1800 MeV using polarized deuteron beam
from new polarized ion source.
New data on the deuteron analyzing powers in
in the wide energy range ...

59. Decay dynamics of 221Ac* formed in 16O+205Tl reaction at above barrier energies

Dr Manoj Kumar Sharma (Thapar Institute of Engineering & Technology)

13/10/2020, 17:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Nitin Sharma and Manoj K. Sharma
School of Physics and Materials Science, Thapar Institute of Engineering & Technology,
Patiala-147004, India
E-mail: msharma@thapar.edu

The study of heavy ion induced reactions provides an opportunity to extract the knowledge of nuclear dynamics and related structural effects of nuclear systems belonging to different regimes of isotopic chart. Significant...

412. RELATIVISTIC MEAN-FIELD EFFECTIVE NN FORCES IN DYNAMICAL MODELING OF HEAVY-ION FUSION

Dr Maria Chushnyakova (Omsk State Technical University)

13/10/2020, 17:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

In the analysis of heavy-ion fusion cross-sections, the relativistic effects are usually ignored [1]. However, it is known that the fastest nucleons in a nucleus have the velocity close to a quarter of the speed of light. The relativistic mean-field (RMF) theory accounting for the effects of high nucleons velocity was successfully applied to reproduce the binding energies and astrophysical...

248. MECHANISMS OF THE T-ODD ASYMMETRIES FORMATION IN REACTIONS OF TERNARY FISSION OF NUCLEI BY COLD POLARIZED NEUTRONS WITH THE EMISSION OF ALPHA PARTICLES

Dmitrii Lyubashevsky (Voronezh State University)

14/10/2020, 14:40

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

It was proved [1] that P-even T-odd asymmetry in differential cross sections of nuclear ternary fission reactions by cold polarized neutrons with the flight of $\alpha$-particles can be represented in common case through the sum of triple ${{\sigma }{3}}\left( \Omega \right)={{A}{3}}\left( \theta \right)\left( {{\mathbf{\sigma }}{n}}\left[ {{\mathbf{p}}{LF}},{{\mathbf{p}}_{\alpha }}...

30. On the Proton Spectra in Collisions of Heavy Ions $^{12}$C + $^{9}$Be at Energies of 0.3–2.0 GeV/nucleon in the Framework of the Hydrodynamic Approach

Prof. Alexander D'yachenko (Petersburg State Transport Univesity)

14/10/2020, 14:40

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

$\bf{A.T. D'yachenko^{1}, I.A.Mitropolsky^{2}}$
$^{1}$Emperor Alexander I Petersburg State Transport University, St.Petersburg, Russia;
$^{2}$NRC"Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia

In the progress of the hydrodynamic approach with a non-equilibrium equation of state [1], collisions with a beryllium target of nuclei $^{12}$C at energies...

57. Describing Pion Production in Collisions of Heavy Ions at Intermediate Energies in the Hydrodynamic Approach with a Non-Equilibrium Equation of State

Prof. Alexander D'yachenko (Petersburg State Transport University)

14/10/2020, 15:05

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

$\bf{A.T. D'yachenko^{1}, I.A. Mitropolsky^{2}}$
$^{1}$ Emperor Alexander I Petersburg State Transport University, St.Petersburg, Russia;
$^{2}$ NRC "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia

In progress of a hydrodynamic approach with a non-equilibrium state equation for describing heavy ion collisions [1], we consider the emission of pions both at...

234. THE QUATERNARY FISSION AS A VIRTUAL PROCESS

Larisa Titova (Voronezh State University)

14/10/2020, 15:05

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

In experimental papers [1, 2] the yields, angular and energy distributions of the pairs of light third and fourth particles formed with the highest probability, such as $\alpha$-particles pair $(\alpha_1,\alpha_2)$, were obtained for the spontaneous quaternary fission of the nucleus $^{252}$Cf. Using the theoretical concepts [3-5] of ternary and quaternary fission as virtual processes [6], we...

415. A NOVEL ALGORITHM FOR CALCULATING PROTON, NEUTRON, AND CHARGE NUCLEAR DENSITIES: COMPARISON WITH THE EXPERIMENTAL DATA

Olga Sukhareva (Omsk State Technical University)

14/10/2020, 15:30

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The Strong nucleus-nucleus Potential (SnnP) is of principal importance for understanding nuclear molecules [1] and for the synthesis of the superheavy nuclei [2]. Nucleon density distributions are known to play a crucial role in finding the SnnP by means of the double folding model [2], [3]. The best way is to calculate the densities in a microscopic manner, i.g. by the Hartree-Fock approach...

216. Theoretical Description of Fragment Angular Anisotropy in Neutron-Induced Fission of Even-Even Nuclei 232Th, 238U, 240Pu at Energies up to 200 MeV

Alexey Barabanov (NRC "Kurchatov Institute")

14/10/2020, 15:30

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

During the past few years, we have measured the angular distributions of fragments in neutron-induced fission of a number of isotopes at energies of 1–200 MeV. The studies were performed at the NRC “Kurchatov Institute” – PNPI using a TOF neutron spectrometer GNEIS at the 1 GeV proton synchrocyclotron (see [1] and references therein). Now we are adding to previously studied nuclei 209Bi, Pb...

352. DETERMINATION OF PHOTONEUTRON PRODUCTION FROM DIFFERENT TARGETS IRRADIATED BY ELECTRON BEAM

Elmira Melyan (Brno University of Technology, Brno, 616 00 Czech Republic, Yerevan State University, Yerevan, 0025 Armenia)

14/10/2020, 15:55

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

This research focused on photoneutron production determination using three different photoneutron converters BeO, LiCl, D2O. Experiment was carried out on a linear electron accelerator [1] in A. Alikhanyan National Laboratory in Yerevan, Armenia. A set of targets was irradiated by 70 MeV electron beam. Reaction rates were determined as a result of investigations. Besides experimental results,...

31. PROBING FISSION FRAGMENTS OF 182, 183Hg NUCLEI AT ENERGIES AROUND COLOUMB BARRIER

Ms Meghashree Cheralu House (Master's)

14/10/2020, 16:10

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Asymmetric fission of mercury nuclei was initially observed in low energy region [1-3]. Sub-lead region is the region where it is noticed that the fission fragment shell property is over-ruled by the ridges and valleys present from saddle to scission point in the potential energy surface. These ridges and valleys are the result of shell correction, which vanishes with increase in excitation...

13. ENERGY DEPENDENCE OF THE FISSION MODE PROBABILITY OF $^{234}$U BY NEUTRONS

Mikhail Onegin (Petersburg Nuclear Physics Institute)

14/10/2020, 16:35

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Mass distribution of the fission fragmnets of $^{234}$U fission by neutrons can be described using three fission modes: S1 (Standard 1), S2 (Standard 2) and SL (Super Long). Yields of these modes can be calculated using the form of the potential barriers along three different paths in the configuration space of nuclei deformation. Vibrational resonance at neutron energy about 0.7 MeV influence...

269. The Kharkov potential in the theory of 2N- and 3N- systems with solving the relativistic Faddeev equations

Aleksandr Shebeko

14/10/2020, 16:35

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

We have extended applications [1] of unitary clothing transformations (UCTs) [2,3] in quantum field theory. Such transformations connect the representation of “bare” particles (BPR) and the representation of “clothed” particles (CPR), i.e., the particles with physical properties. The Kharkov potential is a recent field theoretical model of nucleon-nucleon (NN) interaction that has built up in...

381. REGISTRATION OF DELAYED NEUTRONS FROM 238U PHOTOFISSION AT E max  10 MeV IN INTERVALS OF ~ (15) ms AFTER BEAM PULSES OF THE ELECTRON ACCELERATOR

Dr Leonid Dzhilavyan (Institute for Nuclear Research RAS)

14/10/2020, 17:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Studies of production and properties of nuclei near the stability boundary with respect to neutron emission are an important part of modern nuclear spectroscopy (see, e.g., [1]). In fission of actinide nuclei, neutron-rich nuclei are produced (especially in short-lived light fragments formed in asymmetric fission at low energies of bombarding particles). In small part of beta-decays of these...

173. STUDY OF HADRON SCATTERING ON BORON ISOTOPES WITHIN THE GLAUBER THEORY

Onlassyn Imambekov (Kazakh National University named al Farabi)

14/10/2020, 17:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Hadron scattering on light nuclei at intermediate energies is a good test of investigation of both the structure of nuclei and the mechanisms of interaction. From the scattering of various hadrons, both experimentally and theoretically, proton scattering has been studied in more detail. At the same time, the study of the scattering of other particles, for example, mesons with the same...

200. Alpha cluster structure in 19F

Dr Aliya Nurmukhanbetova (Nazarbayev University)

14/10/2020, 17:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Alpha cluster structure in 19F
Nauruzbayev D.K.1,3, Nurmukhanbetova A.K.1 , Goldberg V.Z. 2
1 Energetic Cosmos Laboratory,Nazarbayev University, Nur-Sultan, 010000,Kazakhstan,
2 Cyclotron Institute, Texas A&M University, College Station, Texas, USA
3 Saint Petersburg State University, Saint Petersburg, Russia
E-mail: anurmukhanbetova@nu.edu.kz

The nucleosynthesis of 19F was...

23. Temperature dependence of the proton emitting decay half-lives using double-folding potential

Dr Seyed Alireza Alavi (University of Sistan and Baluchestan)

14/10/2020, 17:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Using temperature dependent nuclear potential the temperature dependence of proton emitting decay half-lives were analyzed in framework of WKB method with inclusion of quantization conditions. The temperature dependent double-folding and proximity potentials were used in calculations. In temperature independent calculations, in contrary to Prox77, very good agreement between calculated...

127. Data analysis from catcher foil experiment for measurement of cross sections of fusion reaction leading to Hg isotopes.

Mr Antonin Opichal (Flerov Laboratory of Nuclear Reactions, JINR; Department of Experimental Physics, Faculty of Science, Palacky University )

15/10/2020, 14:30

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

    Yields from the complete fusion reaction of 40Ar + 144Sm => 184-xnHg were measured by the catcher foil method [1] (on the U400M cyclotron at the Flerov Laboratory of Nuclear Reactions). Cross sections for neutron channels of complete fusion were calculated from measured yields. The catchers were made out of five aluminum foils (0,8 µm thick) stacked downstream from the...

32. Superasymmetric fission mode in 254Fm nucleus populated by 16O+238U reaction

Dr Tathagata Banerjee (Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, 141980 Russia)

15/10/2020, 14:55

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The search for super-asymmetric fission, has been receiving increasing interest due to its possible interest in producing exotic neutron rich nucleus [1]. Among the four main fission modes prescribed by Brosa [2], the supershort mode manifests itself only when light and heavy fission fragments are close to the double magic tin with A~132 in their nucleon composition. Though the possibility of...

445. Investigation of mass-energy distributions of fragments formed in the 32S+232Th→264Sg reaction at energies bellow and near the Coulomb barrier

Ms Evgeniya Galkina (JINR,FLNR)

15/10/2020, 15:20

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

${E.Galkina^\textit{1}}$, ${E. M. Kozulin^\textit{1}}$,${G. N. Knyazheva^\textit{1}}$ , ${I. M. Itkis^\textit{1}}$, ${A. A. Bogachev^\textit{1}}$, ${I. N. Diatlov^\textit{1}}$, ${M. Cheralu^\textit{1}}$, ${D. Kumar^\textit{1}}$, ${N. I. Kozulina^\textit{1}}$,${ K. V. Novikov^\textit{1}}$, ${A. N. Pan^\textit{1,2}}$,${ I. V. Pchelintsev^\textit{1}}$, ${I. V. Vorobiev^\textit{1}}$,${ W. H....

408. Superasymmetric fission mode of 248,250Cf, 254,256Fm and 260No

Kirill Gikal

15/10/2020, 16:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

This work devoted to the study the mass and energy distributions of fission fragments to investigate the role of closed proton and neutron shells in the fission of 248,250Cf, 254,256Fm, and 260No nuclei [1,2,3,4] at excitation energies of 40–55 MeV. Experiments are performed on the U-400 cyclotron at the Flerov Laboratory of Nuclear Reactions (Dubna, Russia) using the CORSET double-arm...

386. Spectroscopic study of decay properties of transfermium isotopes in Dubna

Mereigul Tezekbayeva (Joint Institute for Nuclear Research)

15/10/2020, 16:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Important information on the structure of Super Heavy Elements (SHE) can come from the study of lighter deformed transfermium (Z ~ 100–106) elements. The cross-section for the formation of these nuclei is many orders of magnitude higher than for Z ≥ 110 so that detailed spectroscopy becomes possible.
The opportunity to have high intensity (>1 pμA) accelerated beams with A ≤ 50 together with...

361. THEORETICAL PREDICTIONS OF THE FRAGMENT AND PROMPT NEUTRON CHARACTERISTICS IN THE SPONTANEOUS FISSION OF SUPERHEAVY NUCLEI.

V.A. Rubchenya (V.G. Khlopin Radium Institute, St.-Petersburg 194021, Russia)

15/10/2020, 16:50

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The consistent theoretical model for the calculations of the mass, charge and energy of fission fragment and the prompt fission neutron energy and multiplicity distributions [1, 2] is applied for the description of the spontaneous fission of the superheavy nuclei. The prompt fission neutron characteristics are formed during emission at descent from the fission barrier to the scission point...

304. Spontaneous fission of 252,254No isotopes

Andrey Isaev (JINR)

15/10/2020, 17:15

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Several experiments aimed to investigate properties of short-lived SF nobelium isotopes we carried out in FLNR. The neutron-deficient isotopes of nobelium were produced in fusion-evaporation reactions using 206,208Pb target and an intensive beam of 48Ca. Fusion-evaporation residues were separated by the SHELS separator and implanted into a large-area double-sided 48х48 strip silicon detector...

357. TEST OF THE 16O(10B,9Be)17F REACTION FOR ANC 17F→16O+p OBTAINING

F.Kh. Ergashev (Institute of Nuclear Physics, Tashkent, Uzbekistan)

15/10/2020, 17:40

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

In this work the measurements of the differential cross sections (DCS) of the reaction 16O(10B,9Be)17F have been carried out at 10B ions beam of the C-200P cyclotron of the Heavy Ion Laboratory (University of Warsaw) with the energy E10B=41.3 MeV. The purpose of the experiment is to find out the suitability of this reaction near the Coulomb barrier to extract the ANC values to use in the...

455. INVESTIGATION OF THE EXCITATION OF ISOMERIC STATES IN THE REACTIONS (,n), (,2n) AND (n,2n) ON THE NUCLEUS ${}^{197}Au

S.R. Palvanov (Department of Physics, National University of Uzbekistan, Tashkent, Uzbekistan)

16/10/2020, 15:15

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

In the present work the results of the experimental study of the photoexcitation of isomeric states ${}^{196m}$Au(J=12${}^{-}$) and ${}^{195m}$Au(J=11/2${}^{-}$) in reactions (,n), (,2n) and (n,2n) on the nucleus ${}^{197}$Au in the range 10-35 MeV are presented.
The isomeric yield ratios were measured by the induced radioactivity method. Samples of natural Au have been irradiated in the...

428. Investigation of binary processes in reactions 36Ar+144, 154Sm and 68Zn+112Sn leading to the formation of neutron-deficient 180, 190Hg composite systems.

Alexey Bogachev (JINR)

16/10/2020, 15:40

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Asymmetric fission process observed in decay of neutron-deficient nuclei lying in sub-lead (Pb) region provoked intensive investigations of fission process of these nuclei [1, 2]. Mass-energy and angular distributions of fission fragments of neutron-deficient 180, 190Hg composite systems formed in the reactions 36Ar + 144, 154Sm, 68Zn + 112Sn were measured using two-arm time-of-flight...

166. Measurements of the $\gamma$ ray emission cross-sections in Fe($n,x\gamma$)-type reactions

Nikita Fedorov (Joint Institute for Nuclear Research; Faculty of Physics, Lomonosov Moscow State University)

16/10/2020, 16:05

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Iron-based alloys are important construction materials which are widely used in science and industry. Information about cross-sections of different nuclear reactions on iron is needed to accurate modeling of different nuclear facilities, elemental analysis and other applications. From theoretical point of view, experimental cross-sections are needed to ajust optical potentials for incoming and...

250. Ranges of radon and mercury isotopes with energies of 0.12-0.25 MeV/amu in aluminum

Elena Chernysheva (Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research)

16/10/2020, 17:10

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The ranges in aluminum of radon and mercury isotopes, produced in xn-evaporation channels of the complete fusion reactions $^{40}$Ar+$^{144}$Sm, $^{36}$Ar+$^{148}$Sm, $^{40}$Ca+$^{144}$Nd, $^{48}$Ca+$^{142}$Nd and $^{40}$Ar+$^{166}$Er, have been measured in energy range of $0.12-0.25$ MeV/amu. The energies of the primary beams, delivered by the cyclotron U-400M, were measured by the...

370. Charged Particles Emission in Fast Neutrons Processes on Mo Isotopes

Dr Ioan Alexandru Oprea (FLNP JINR Dubna)

16/10/2020, 17:35

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The Molybdenum nucleus, (protons numbers Z=42 and mass A= 83-115) has 33 isotopes of which 7 are natural (A=92, 94, 95, 96, 98, 100) and four isomers. The first 6 natural isotopes are stable but the nucleus with A=100 is unstable with the time of life of 7.8  1018 y. The isotopes with A=100 is a fission product and it is used in medicine.
Nuclear reactions induced by fast neutrons are of...

212. Study of Ta-178m and Hf-180m in reactions with released charged particles

Prof. Viktor Zheltonozhsky (Lomonosov Moscow State University)

16/10/2020, 18:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

A study of the cross-sections and level filling yields of high-spin isomeric states provides information about the structure of excited levels in the continuous and discrete regions of excitation, as well as about the mechanisms of nuclear reactions. Therefore, the aim of our work is to study the $^{178m}$Ta and $^{180m}$Hf yields in reactions with bremsstrahlung with energies ranged in the...

220. A study of reactions with the emission of charged particles at Emax = 55 MeV on natural tantalum and tungsten targets

Prof. Viktor Zheltonozhsky (Lomonosov Moscow State University)

16/10/2020, 18:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

A research of the cross-sections and level filling yields of high-spin isomeric states in reactions with the emission of charged particles allows one to obtain diverse information both about the structure of excited levels in the continuous and discrete regions of excitation and about the mechanisms of nuclear reactions. Therefore, the aim of our work is to study the production yields of...

29. Potential Description of alpha+208^Pb Elastic Scattering

Prof. Md Nure Alam Abdullah (Department of Physics, Jagannath University)

16/10/2020, 18:50

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The last two decades have seen the considerable success of non-monotonic (NM) and modified single-folded (MSF) potentials in describing the alpha-induced elastic scattering and non-elastic processes which exhibit a distinctive feature of anomaly in large angle scattering (ALAS). The ALAS effect cannot be explained by the Woods-Saxon type of optical model (OM) potential in a consistent manner....

283. Observation of the 3.82 MeV state from the $^{9}$Be(d,d')$^{9}$Be reaction at E(d) = 23 MeV

Mr Viktar Starastsin (National Research Center «Kurchatov Institute»)

17/10/2020, 09:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The experiment $^{9}$Be(d,d')$^{9}$Be at E(d) = 23 MeV was carried out at the HI-13 tandem accelerator, China Institute of Atomic Energy (CIAE), Beijing. Two different method of detection were used: Q3D spectrometer at forward angles and strip detectors ($\Delta$E-E) at medium and large angles. Following excited states are seen in experimental spectra: g.s, 2.43, 2.78, 3.05, 3.82, 4.7, 5.59,...

268. MECHANISM OF THE 11B(α, t)12C REACTION AT AN ENERGY OF 40 MeV

Stanislav Sakuta

17/10/2020, 09:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The experiment was performed on a α-particle beam extracted from the isochronous cyclotron U-150M of the Institute of Nuclear Physics (Almaty, Kazakhstan).
The differential cross sections of tritons from the 11B (α, t) reaction with transitions to the ground (0+) and to excited states of the 12C nucleus at Ex = 4.44 MeV (2+), 7.65 MeV (0+), 9.64 MeV (3-) and 14.08 MeV (4+) MeV have been...

201. B-10 (γ, t)-reaction study

Dr Marina Zheltonozhskaya (Lomonosov Moscow State University)

17/10/2020, 09:50

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Currently, the most studied are (γ, $n$)- and (γ, γ')-reactions. Reactions with the release of charged particles, especially for light nuclei, are much less studied. The main reason for this is the lower cross-sections of these channels in comparison with the (γ, $n$)-reactions due to the Coulomb barrier. At the same time, the study of photonuclear reactions with the release of charged...

196. 6Li(d,xt) reaction total cross section measurements by secondary activation method

Mr Leonid Generalov (RFNC All-Russia Research Institute of Experimental Physics)

17/10/2020, 10:15

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

6Li(d,xt) reaction total cross sections were measured at electrostatic tandem accelerator EGP-10 (RFNC-VNIIEF) at 2.5-12 MeV deuteron energy (fig.1). Secondary activation method proposed by B.Ya. Guzhovskii was used. Cross section was determined by registration of 18F collected yield from 16O(t,n)18F reaction (β+, T1/2=109 min.) produced by 6Li(d,xt) tritons in three quartz tubes situated...

193. Optical-model analysis of proton elastic scattering on 6,7Li and 9Be nuclei with resonance part

Mrs Svetlana Selyankina (RFNC All-Russia Research Institute of Experimental Physics)

17/10/2020, 10:40

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Performed an optical-model analysis (description) of proton elastic scattering at 50 keV to 200 MeV proton energy Ep on 6,7Li and 9Be nuclei. There was used an optical-model code OptModel (developed at RFNC-VNIIEF) where resonance part of elastic scattering was taken into account. Energy dependences of optical potential parameters from [2] with our modifications were used. All obtainable data...

81. Time-dependent calculation for processes of neutron transfer and nuclear breakup in $^{11}$Li+$^{28}$Si reaction

Aidos Azhibekov (Joint Institute for Nuclear Research)

17/10/2020, 11:20

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The results of theoretical calculation of the neutron transfer and nuclear breakup for the $^{11}$Li+$^{28}$Si reaction at energy range 1–55 MeV/nucleon are presented. The total cross sections for the $^{11}$Li+$^{28}$Si reaction are calculated based on a numerical solving of the time-dependent Schrödinger equation for the external weakly bound neutrons of the projectile nucleus $^{11}$Li....

332. ASTROPHYSICAL S-FACTOR OF THE DIRECT 3He(α,γ)7Be CAPTURE REACTION IN CLUSTER MODELS

S.A. Turakulov (Institute of Nuclear Physics, Academy of Sciences, 100214, Ulugbek, Tashkent, Uzbekistan; Tashkent Railway Engineering Institute, Uzbekistan)

17/10/2020, 11:45

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The direct ${}^3$He(α,γ)${}^7$Be radiative capture reaction is studied in the framework of two- and three-body potential cluster models [1,2]. E1 and E2 transitions are described at the long-wavelength approximation. The two-body model is based on a simple Gaussian form $α^{3}$He-potential of Dubovichenko $V_{D}^{a}$ from Ref.[1], with a modification in d waves. The new potential parameters...

450. INVESTIGATION OF T(${}^{1}$H, $\gamma$)${}^{4}$He REACTION IN THE ASTROPHYSICAL ENERGY RANGE

Mr D. Chumakov (National Research Tomsk Polytechnic University)

17/10/2020, 12:10

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The study of reaction T(${}^{1}$H, $\gamma$)${}^{4}$He is of interest both for nuclear physics and nuclear astrophysics. In nuclear astrophysics, it is necessary to get more accurate data about the rates of primordial synthesis reactions, which cause the synthesis of ${}^{4}$He [1,2]. In nuclear physics, there are several theoretical predictions of this reaction cross-section and S-factor...

50. Polarized dd fusion experiment (PolFusion) in PNPI

Mr Ivan Solovyev (NRC Kurchatov Institute PNPI (RU))

17/10/2020, 12:35

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The $^{2}H(d,p)^{3}H$ and $^{2}H(d,n)^{3}He$ fusion reactions at low energies are relevant in pure and applied physics. These reactions took place in the first minutes during the Big Bang nucleosynthesis and occur in the early phases of stellar burning. Active discussion [1] is being made to encourage scientists in research in the field.

The low-energy regime (tens to hundreds of keV)...

41. POPULATION OF EXCITED STATES IN 45Ti AND 197Hg NUCLEI IN CHARGE-EXCHANGE REACTIONS ON LOW-ENERGY 3He BEAMS

Mr T. Issatayev (JINR)

17/10/2020, 13:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Studying charge-exchange reactions allows one to study the structure of a nucleus and understand the mechanism of the ongoing reaction.
In the charge-exchange reactions (p, n) and (3He, t) at low energy of bombarding particles on nuclei with even mass, isobar-analog and other excited states have been observed and identified. The reaction (3He, t) has certain advantages over the (p, n)...

184. A possibility of determining cluster structure of $^6\text{Li}$ excited states in inelastic scattering of $\alpha$-particles

Aleksandr Kasparov (Institute for Nuclear Research, Russian Academy of Sciences, Moscow)

17/10/2020, 13:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The study of the cluster structure of light nuclei is one of the fundamental problems of nuclear physics. The cluster structure of $^6\text{Li}$ nucleus was a subject of many experimental and theoretical studies, for example [1-3]. The cluster configurations of $^6\text{Li}$ excited states can be either two-cluster ($^4\text{He}+d$, $^5\text{He}+p$, $^5\text{Li}+n$, $^3\text{He}+t$), or...

132. Scattering features on non-spherical potential

Mr Pavel Krassovitskiy (Join institute for nuclear research, Institute of nuclear physics, Almaty)

17/10/2020, 15:10

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

An actual problem in studying the interaction of nuclei is the assumption of the non-spherical shape of a particle [1]. Of particular interest is the variation in the scattering cross section. As an example, we consider neutron scattering at U$^{238}$.
![Elastic scattering of neutron at uranium. The solid line represent scattering at spherical potential; the dashed line is result of...

61. Few-body dynamics and few-body correlations in the dripline nuclei

Prof. Leonid Grigorenko (Flerov Laboratory of Nuclear Reactions, JINR)

17/10/2020, 15:35

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

Studies of nuclear systems close to and beyond the driplines is an important field of the modern radioactive ion beam studies. Because of paring and clusterization effects the lowest threshold in the dripline systems are often few-body thresholds (2p, 2n, 4p, 4n, etc.). This lead to emergence near such thresholds of states having expressed few-cluster structure or/and corresponding few-body...

149. Angular Distribution of Gamma Rays from the Inelastic Scattering of 14.1 MeV Neutrons on Sodium and Chlorine

Saltanat Dabylova (Joint Institute for Nuclear Research)

17/10/2020, 16:00

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

For investigation of 14.1-MeV neutron-induced nuclear reactions, at Frank Laboratory of
Neutron Physics (FLNP) of the Joint Institute for Nuclear Research (JINR), a project TANGRA
(Tagged Neutrons & Gamma Rays) was created [1].
In the framework of this project, we are investigating the energy and angular distributions of
the characteristic gamma-rays raising from the inelastic scattering...

359. Recent studies on pre-compound emission in light and heavy ion reactions at low energies

Manoj Kumar Sharma (Department of Physics, Shri Varshney College, Aligarh-202001, India)

17/10/2020, 16:25

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The pre-compound (PCN) emission has been one of the important mechanisms both in light and heavy ion reactions at relatively high energies above 10 MeV/A. Recent observations of PCN emission even at low incident energies below 10 MeV/A, where evaporation process dominates, have renewed interest to carry out further research in the aforesaid reaction mechanism[1-2]. Plenty of experimental data...

128. CROSS-SECTIONS FOR THE 27Al(γ,2pn)24Na MULTIPARTICLE REACTION AT Еγmax = 31.5-100 MeV

Dr O.S. Deiev

17/10/2020, 16:50

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

The possibility of using the photonuclear multiparticle reaction 27Al(γ,2pn)24Na (Eth = 31.4 MeV) as a monitor of the flux of γ-quanta with the bremsstrahlung end-point energies Eγmax up to 140 MeV was studied. The aluminum targets were activated by the bremsstrahlung beam at Eγmax = 30-100 MeV using the LUE-40 RDC “Accelerator” NSC KIPT. The γ-radiation spectra of the irradiated 27Al targets...

505. 12C,16O(10B,9Be) REACTIONS STUDY FOR ANC 13N→12C+p AND 17F→16O+p EVALUATION

Dr F.Kh. Ergashev (Institute of Nuclear Physics, Tashkent, Uzbekistan), Dr S.V. Artemov, et al.

Oral report

Joint report.

THE 12C(10B,9Be)13N REACTION STUDY FOR ANC 13N→12C+p EVALUATION
URL: https://indi.to/Dj3HM

TEST OF THE 16O(10B,9Be)17F REACTION FOR ANC 17F→16O+p OBTAINING
URL: https://indi.to/3JMVc

454. THE ${}^{12}$C(${}^{10}$B,${}^{9}$Be)${}^{13}$N REACTION STUDY FOR ANC ${}^{13}$N→${}^{12}$C+p EVALUATION

S.V. Artemov (Institute of Nuclear Physics, Tashkent, Uzbekistan)

Section 2. Experimental and theoretical studies of nuclear reactions.

Oral report

In this work the measurement of the differential cross sections (DCS) of the proton transfer reaction ${}^{12}$C(${}^{10}$B,${}^{9}$Be${}_{g.s.}$)${}^{13}$N${}_{g.s.}$. has been carried out (Fig. 1) for the ANC ${}^{13}$N${}_{g.s.}$→${}^{12}$C+p obtaining. The experiment was fulfilled at 10B ions beam of the C-200P cyclotron of the Heavy Ion Laboratory (University of Warsaw) at the energy...