ISOLDE Workshop and Users meeting 2020

Session

HIE-ISOLDE Session

Nov 26, 2020, 9:05 AM

Conveners

HIE-ISOLDE Session

• Gerda Neyens (CERN)

HIE-ISOLDE Session

• Gerda Neyens (CERN)

17. The SpecMAT active target

Oleksii Poleshchuk (KU Leuven, Institute for Nuclear and Radiation Physics)

11/26/20, 9:05 AM

Invited

The SpecMAT active target will be used to study isotopes in the exotic regions of the nuclide chart and investigate the fundamental questions related to the shell structure of nuclei far from stability via nucleon-transfer reactions in inverse kinematics. The active target will be placed in a strong and homogeneous magnetic field of the ISOLDE Solenoidal Spectrometer for reconstruction of the...

23. Isovector valence-shell excitation of $^{140}$Nd - (IS 546)

Ralph Kern (TU Darmstadt)

11/26/20, 9:25 AM

Submitted

The impact of the local shell structure on the proton-neutron mixing in low-energy quadrupole states is of particular interest in contemporary nuclear structure research. In vibrational nuclei, the two most generic quadrupole-collective excitations are a mixture of the collective $2^+$ proton and $2^+$ neutron excitations. The symmetric (isoscalar) coupling appears as the lowest-lying $2^+$...

25. Collectivity in $^{142}$Xe

Corinna Henrich (Technische Universitaet Darmstadt (DE))

11/26/20, 9:45 AM

Submitted

The neutron-rich $^{142}$Xe lies north-east of the doubly-magic $^{132}$Sn, in a region that is not only describable by nuclear theory with single-particle and mean-field approaches, but also became accessible in experiments in recent times.

Since the r-process is expected to pass through the region, knowledge on the nuclear structure of the nuclides therein may impact the theoretical...

13. The single-neutron excitation of $^{207}$Hg

Tsz Leung Tang (Argonne National Laboratory (US))

11/26/20, 10:10 AM

Invited

The single-neutron excitation was studied for the first time via the $^{206}$Hg(d,p) reaction in inverse kinematics using a $^{206}$Hg beam. The beam was produced at the CERN’s ISOLDE facility at an energy of 7.4 MeV/u. The energy and position of protons emitted at backwards angles were measured using the new ISOLDE Solenoidal Spectrometer (ISS) at a magnetic field strength of 2.5 T. The...

5. Evolution of single-particle structure along $N=17$: The $d(^{28}$Mg,$p)^{29}$Mg reaction measured with the ISOLDE Solenoidal Spectrometer

Patrick Thomas MacGregor (University of Manchester (GB))

11/26/20, 10:30 AM

Submitted

Single-particle structure has been observed to evolve away from stability. The ordering and separation between levels varies to the extent that the established magic numbers change. For example, in the neutron-rich region where $Z = 8$-20, the $N = 20$ shell closure weakens, with a new closure emerging at $N=16$ in $^{24}$O [1]. In order to understand the evolution of these shell closures, and...

4. High-lying resonances in the $^7$Be + d reaction

Dhruba Gupta (Bose Institute (IN))

11/26/20, 10:50 AM

Submitted

The experiment IS 554 was carried out at HIE-ISOLDE to study high-lying resonances in the $^7$Be + d reaction, in the context of the unsolved cosmological lithium problem. We utilized the scattering chamber at HIE-ISOLDE, with sets of DSSD covering an angular range of 8$^o$ - 170$^o$. Resonance enhancement is one way to study the lithium abundance anomaly. The 16.63 MeV and other nearby...