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19/08/2026, 09:00
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19/08/2026, 09:25
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Alessia Francesca Di Pietro (Universita e INFN, Catania (IT))19/08/2026, 09:30
The presentation explores reaction experiments using low-energy post-accelerated radioactive beams to
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examine the influence of halo structures and neutron and proton excess on reaction dynamics and nuclear structure. Results of reactions induced
by neutron-halo and proton-halo nuclei performed at ISOLDE are compared, highlighting differences in the reaction dynamics that
stem from... -
Ivan Todorov Anastasov (University of Sofia - St. Kliment Ohridski (BG))19/08/2026, 10:30
The nuclear shell model, combined with pairing correlations, offers a straightforward explanation of the low-energy spectra of semi-magic nuclei. In a single high-$j$ orbital with more than two particles, low-lying $J>0$ states arise from recoupling of unpaired nucleons and group into multiplets labeled by seniority $\nu$ -- the number of unpaired particles. The generalized seniority scheme is...
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Alina Didik (Universitaet zu Koeln (DE))19/08/2026, 10:50
The recoil distance Doppler-shift (RDDS) technique is a well-established method for the determination of excited-state lifetimes and electromagnetic transition strengths. The implementation at the MINIBALL plunger extends this capability to post-accelerated radioactive ion beams at HIE-ISOLDE and establishes a new experimental program for lifetime measurements.
The commissioning experiment...
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Hannah Kleis (University of Liverpool (GB))19/08/2026, 11:20
Shape coexistence in the neutron-deficient lead region around $N \approx 104$ has been discovered in different nuclei especially in the mercury isotopes, where a staggering effect was found between even- and odd-mass nuclei using charge radii measurement [1,2]. In addition the study of the even-even $^{182-188}$Hg isotopes via various reactions showed a mixing of weakly deformed oblate and...
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Erwin Siesling (CERN)19/08/2026, 11:40
Long Shutdown 3 for ISOLDE started already right at the end of the physics run in December 2025 to accommodate the 24 months of work needed for the ISOLDE Beam Dump Replacement project. This period was chosen strategically to have the full ISOLDE facility ready with the restart of the CERN injector chain and the return of protons from the PS Booster to ISOLDE in 2028.
The 2 years of ISOLDE...
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Annie Dolan19/08/2026, 13:40
The ISOLDE Solenoidal Spectrometer (ISS) is used to study transfer reactions in inverse kinematics with the high-energy beams delivered by the HIE-ISOLDE linac. ISS has completed five successful physics campaigns since it was fully commisssioned in 2021. This talk will provide an overview of the experiments performed, developments made since the 2023 HIE-ISOLDE workshop, and future plans for...
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Gulla Torvund (University of Oslo (NO))19/08/2026, 14:10
We investigate $^{207}$Tl, the one-proton-hole neighbor of doubly magic $^{208}$Pb — one of the most thoroughly studied doubly magic nuclei, whose first excited state is a well-established octupole phonon vibration. A deep-inelastic experiment has confirmed the existence of a 17/2$^+$ state in $^{207}$Tl [1], previously proposed theoretically to be a particle-octupole vibration coupling (POVC)...
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C. O'Shea (University of Surrey)19/08/2026, 14:30
Thermonuclear runaways on the surface of accreting neutron stars, known as Type-I X-ray bursts (XRBs), are powered by the rapid-proton ($rp$) process, a sequence of proton captures and $\beta^{+}$ decays involving nuclei extending toward the proton drip line. Since many of the nuclei involved are experimentally inaccessible, key reaction rates remain poorly constrained, introducing significant...
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Erik Jensen (Chalmers University of Technology (SE))19/08/2026, 15:10
While radioactive ion beam facilities in Europe are currently undergoing maintenance and major upgrades, the newly commissioned Facility for Rare Isotope Beams (FRIB) in the U.S. has been providing radioactive beams for nuclear physics experiments for the past four years.
The Gas Stopping Area at FRIB enables thermalisation and momentum compression of in-flight radioactive beams, yielding...
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Tobias Beck (KU Leuven (BE))19/08/2026, 15:30
To be added
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Josh Alex David Curry (University of Liverpool (GB))20/08/2026, 09:00
The performance of the silicon detectors used in the ISOLDE Solenoidal Spectrometer depends on an accurate calibration, which requires precise knowledge of these detector dead-layer thicknesses. A mixed alpha source was used to irradiate the ISS silicon array at different incidence angles. Source positions were determined by fitting the measured count distributions with a solid-angle model. By...
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Pietro Nicola Spagnoletti (University of Liverpool (GB))20/08/2026, 09:20
In our recent Coulomb Excitation study of $^{144}$Ba at Miniball we performed a new approach to producing gamma-ray spectra. This was essential to access the weak $3^-\rightarrow2^+$ $\gamma$-ray decay, the key result of this work and Dr Ben Jones PhD thesis. The approach builds upon our previous study of $^{222}$Rn (https://doi.org/10.1103/PhysRevC.105.024323), wherein we energy of a single...
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Maria Vittoria Managlia (Chalmers University of Technology (SE))20/08/2026, 09:40
Where do the heaviest elements in the Universe come from? Gold, platinum,
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uranium are not made on Earth, but forged in some of the most violent events in
the cosmos, such as the collisions of neutron stars. There, atomic nuclei
capture neutrons and grow heavier and heavier, until they become so unstable
that they split in two. This splitting, called \textit{nuclear fission}, sets a limit... -
Ismael Martel (University of Huelva (ES))20/08/2026, 10:30
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The HIE–ISOLDE facility has established a broad programme of nuclear structure and reaction studies with radioactive ion beams, particularly through the Miniball, ISS, and SEC collaborations. Despite these achievements, several physics questions remain challenging due to limitations in sensitivity and selectivity, especially for low-intensity beams and weak reaction channels.
This...
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Teresa Kurtukian Nieto (Consejo Superior de Investigaciones Cientificas (CSIC) (ES))20/08/2026, 10:50
The ISLS (ISOLDE Superconducting Linear Spectrometer) is a by-product of the ISOLDE Superconducting Recoil Separator (ISRS) project. It integrates MAGDEM (MAGnet DEMonstrator), the fundamental building block of the ISRS particle storage ring.
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MAGDEM is an extremely compact, helium-free Nb-Ti CCT superconducting magnet cooled by a single Gifford–McMahon (GM) cryocooler. It incorporates nested... -
Ariel Esteban Tarifeno Saldivia (Instituto de Física Corpuscular (IFIC), CSIC-UV, Spain)20/08/2026, 11:20
Radiative neutron capture (n,γ) reactions govern the nucleosynthesis of heavy elements in stars through the slow (s-), intermediate (i-), and rapid (r-) neutron capture processes. Despite more than 70 years of experimental effort, direct (n,γ) cross-section measurements have been performed on only ~350 stable nuclei and merely 17 radioactive isotopes.
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The difficulty lies in the need to... -
Prof. Luis M Fraile (CERN), Sean John Freeman (The University of Manchester (GB))20/08/2026, 11:40
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Rafael Antonio Lopez20/08/2026, 13:30
Recent Monte Carlo Shell Model (MCSM) calculations made by T. Togashi et. al. [Phys. Rev. Lett. 121, 062501 (2018)] attempt to account for discrepancies observed between measurements and previous theoretical calculations of the reduced transition probability B(E2;$2^{+}_{1}->0^{+}_{1}$) in the neutron deficient Sn isotopes. One of the predictions of the MCSM calculation is that a shape change...
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Maximilian Paul Droste (Universitaet zu Koeln (DE))20/08/2026, 13:50
Coulomb excitation of the neutron-rich, even-even isotopes $^{130}$Sn and $^{134}$Sn was performed at the HIE-ISOLDE facility using post-accelerated radioactive ion beams at an energy of 4.4 MeV/u, impinging on $^{206}$Pb and $^{194}$Pt targets. The de-exciting $\gamma$ rays were detected with the refurbished high-efficiency Miniball spectrometer in coincidence with scattered particles,...
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Sebastian Gomez Garcia (Consejo Superior de Investigaciones Cientificas (CSIC) (ES))20/08/2026, 14:10
The Scattering Experiments Chamber (SEC) is the third and final experimental station installed at HIE-ISOLDE on the XT03 beamline. Its large dimensions allow the integration of complex experimental setups combining both charged-particle detectors and scintillator arrays. This flexibility provides an ideal environment for reaction studies over the full angular range, enabling experiments on...
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Hannes Mayr (Technische Universitaet Darmstadt (DE))20/08/2026, 15:00
The generalised seniority scheme is a truncated version of the nuclear shell model [1]. It is able to describe the structure of atomic nuclei in the vicinity of shell closures. The number of unpaired nucleons, the seniority $\nu$, is considered a good quantum number.
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The region of the even-even Po-Rn-Ra nuclei with $N=124$ exhibits strong signs of seniority-like behaviour. This can be... -
Sean John Freeman (The University of Manchester (GB))20/08/2026, 15:20
The status of transfer reaction measurements focussed on the Mg island of inversion, which build on the study of 28Mg(d,p) performed in RUN2, will be summarised.
Measurements of the (d,p) reaction on beams of 27Na and 27Mg have been performed with ISS. The cross sections have been analysed using two different reaction models with a high degree of consistency. Comparisons of strength...
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20/08/2026, 15:50
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Frank Browne (The University of Manchester (GB))21/08/2026, 09:00
The High-resolution Cluster Array at the RIBF (HiCARI) was a limited-time installation of segmented high-purity germanium detectors of different types at the RIBF, RIKEN. Three experimental campaigns covering a broad range of physics topics were conducted with HiCARI over a two-year period. The in-beam gamma-ray spectroscopy experiments covered a wide range of the available beams at the RIBF...
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Liam Gaffney (University of Liverpool (GB))21/08/2026, 09:30
Identifying nuclei that have a stable octupole deformation is crucial to the search for odd mass isotopes with atomic electric-dipole moments (EDMs). Observation of a non-zero atomic EDM at the current levels of experimental precision would indicate $CP$ violation and would imply new physics beyond the standard model. Nuclear mean-field calculations predict that octupole correlations are...
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Hakan Johansson (Chalmers University of Technology (SE))21/08/2026, 10:20
Double-sided silicon strip detectors (DSSSDs) are used in many experiments. They provide good position resolution and help reduce the readout capacitance. However, calibrating many individual strips can be challenging.
A tool that almost automatically performs an internal gain-matched calibration will be presented. It is based on Millepede II, which is typically used for detector...
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Kathrin Wimmer (University of Cologne)21/08/2026, 10:40
HI-TREX is the next-generation silicon detector array for transfer-reaction studies at HIE-ISOLDE. Improved granularity, increased solid-angle coverage, modern ASIC-based readout electronics, and enhanced rate capability will significantly extend the experimental possibilities for charged-particle spectroscopy in combination with the MINIBALL $\gamma$-ray spectrometer.
This contribution...
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Dr Vetle Wegner Ingeberg (Department of Physics, University of Oslo)21/08/2026, 11:20
For the next run period at ISOLDE, the Nuclear Physics group at the University of Oslo are considering proposing a longer experimental campaign with the Oslo SCintillator ARay (OSCAR). The main aims of such a campaign will be to measure the nuclear level density and $\gamma$-ray strength function of key nuclei relevant for nuclear structure and nuclear astrophysics (e.g. i-process...
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Georgi Georgiev (Université Paris-Saclay (FR))21/08/2026, 11:40
Getting control of an additional degree of freedom of a system is a dream and a challenge for any experimentalist. Experiments with spin-polarized stable beams were done around 1990’s. However, with the change of the paradigm and the advances of Radioactive Ion Beam (RIB) - based nuclear structure studies, this subject of research has been slowly fading away. The questions that we would like...
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Jose Nicolas Orce Gonzalez (University of the Western Cape (ZA))21/08/2026, 13:30
Here we present the scientific motivation for investigating the shapes of benchmark nuclei at the LHC ($^{12}$C, $^{24}$Mg, $^{48}$Ca, $^{76}$Ge-$^{86}$Kr and $^{136}$Xe-$^{136}$Ba), which can also be studied through low-energy Coulomb-excitation measurements at HIE-ISOLDE. By combining complementary measurements across these two energy regimes, these benchmark nuclei offer a unique...
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Yassid Ayyad (Universidade de Santiago de Compostela)21/08/2026, 13:50
Direct reactions in inverse kinematics are among the most powerful probes of the structure of exotic nuclei, but their study with post-accelerated radioactive beams is often limited by the trade-off between target thickness and resolution, and by the low intensities available for the most exotic species. We propose to bring the Active Target Time Projection Chamber (AT-TPC) to ISOLDE and to...
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21/08/2026, 14:10
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21/08/2026, 15:20
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