ISOLDE Decay Station (IDS) collaboration meeting (March 2025)

11 Mar 2025, 11:00 → 12 Mar 2025, 13:00 Europe/Zurich

Sala de Grados (1st floor) (Facultad de Ciencias Físicas UCM)

Andres Illana, Hilde De Witte (KU Leuven (BE)), James Cubiss (The University of Edinburgh (GB)), Luis M Fraile (Universidad Complutense (ES)), Razvan Lica (Horia Hulubei National Institute of Physics and Nuclear Engineering (RO)), Thomas Elias Cocolios (KU Leuven - IKS)

 

 

 

The ISOLDE Decay Station (IDS) collaboration meeting will be organized at Complutense University of Madrid (https://maps.app.goo.gl/S9jWdqYDkGeqFtb28) on the afternoon of March 11^th, 2025, through to afternoon of March 12^th 2025. The aims of the collaboration meeting are:

• To present the current status of results pending publication and future experiment proposals.
• To review the progress of on-going upgrades for the device and discuss future developments.
• To discuss potential uses for the device during CERN's LS3 period.

All members of the IDS collaboration are welcome, as well as external researchers interested in performing experiments at IDS.

We note that the FAST'25 workshop will follow immediately after the IDS collaboration meeting, from the midday of March 12^th 2025. Details for the FAST'25 workshop can be found at the following link https://indico.cern.ch/event/1502610/

Tuesday night group meal - 20:30 at El Escarpin; elescarpinsidreria.com; https://maps.app.goo.gl/a3wXTRu1rEQ6Dagc6.

Tuesday 11 March

12:30 → 14:00 Session 1: Open session

12:30 Welcome and updates

Speaker: James Cubiss (The University of Edinburgh (GB))

2025_IDS_welcome_and_updates.pdf

13:00 IS456 Progress on Decay and Resonance Laser Ionisation Spectroscopy of Neutron Rich Polonium

Speaker: Jack Shaw (KU Leuven (BE))

Jack_shaw_DecaySpectroscopyOfPolonium_March2025.pdf

13:20 Results from the IS685 experiment on Cd isotopes

Speaker: Marcos Llanos Exposito (Universidad Complutense (ES))

13:40 Study of the isospin of the 2+ doublet in 8Be populated in the beta+/EC decay of 8B

Speaker: Daniel Fernandez Ruiz (Consejo Superior de Investigaciones Cientificas (CSIC) (ES))

DFR-8boro.pdf

14:00 → 15:00 Lunch break

15:00 → 16:25 Session 2: Open session

15:00 Nuclear structure of the exotic nucleus 84Ge

Speaker: Pablo Gonzalez-Tarrio Vicente (Universidad Complutense (ES))

15:20 Gamma-ray spectroscopy analysis of 229Ac following the beta-decay of 229Ra

Speaker: Magda Satrazani (KU Leuven (BE))

MMS_IDS_Collaboration_Meeting25.pptx

15:40 Beta delayed neutron emission from 8He

Speaker: Jeppe Schultz Nielsen

IDS collaboration meeting.pdf

16:00 Decay spectroscopy of Ac225 and daughters

Speaker: Jana Aelbrechts (KU Leuven (BE))

presentation_IDS_Ac225_JA.pdf

16:25 → 16:50 Coffee break

16:50 → 18:00 Session 3: Open session

16:50 Beta-delayed two-neutron spectroscopy of 134In

Experimental measurements of beta-delayed neutron emitters south-east of the 132Sn region can be used to validate the Hauser-Feshbach statistical model [1] calculations where beta-delayed two-neutron emission is an accessible decay mode. A previous measurement of neutron-rich gallium isotopes had shown that single-neutron emission is dominant from two-neutron unbound excited states [2], which is well described by the statistical model in the case of high nuclear level densities. To explore these phenomena in the low nuclear level density regime, a measurement of beta-delayed neutron emission from 134In was performed at the ISOLDE decay station (IDS) at CERN [3]. For the first time, correlated two-neutron emission from excited states in 134Sn were measured using the NEXT detector[4,5]. Moreover, the initial neutron emission was found to populate the neutron-unbound single-particle i13/2 state in 133Sn, which has gained attention over the last two decades [6-9]. This talk will cover both the experimental results and the comparison with the theoretical models in regards to BGT and the statistical model.

Funding: National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Cooperative Agreements No. DE-NA0003899 and DE-NA0004068, U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-FG02-96ER40983 (UTK), National Science Foundation under the contract NSF-MRI-1919735. References:

[1] W. Hauser, H. Feshbach; Phys. Rev. 87, 366 (1952)
[2] R. Yokoyama, R. Grzywacz, et al; Phys. Rev. C 100, 031302 (2019)
[3] R. Grzywacz, M. Madurga, M. Karny; https://cds.cern.ch/record/2752915
[4] J. Heideman, et al; Nucl. Inst. And Methods A 946, 162528 (2019)
[5] S. Neupane, et al; Nucl. Inst. And Methods A 1020, 165881 (2021)
[6] W. Urban, W. Kurcewicz, A. Nowak, et al; EPJ A 5, 239 (1999)
[7] P. Hoff, P. Baumann, A. Huck; Hyperfine Interactions 129, 141 (2000)
[8] A. Korgul et al.; EPJ A 7, 167 (2000)
[9] K. Jones et al.; Nature 465, 454 (2010)

Speaker: Peter Dyszel (University of Tennessee (US))

Peter_Dyszel IDS March2025.pdf

17:10 Proposal for the installation of the SLICES spectrometer at the IDS

SLICES is a spectrometer for internal conversion electrons designed for the beta decay station of the SPES facility at the Legnaro National Laboratories. It consists of a magnetic transport system coupled to a segmented large-area Si(Li) detector. The Si(Li) detector is about 70 mm in diameter and 7 mm thick, is segmented in 32 radial segments, and is cooled down to liquid nitrogen temperature. The setup ensures a very good energy resolution (about 3 keV of FWHM at 1 MeV electron energy) and high efficiency in specific energy ranges (up to 8-12%). In this talk, I will describe SLICES and present the proposal for its installation at the IDS.

Speaker: Marco Rocchini (Universita e INFN, Firenze (IT))

rocchini_SLICES-IDS.pdf

17:30 Muonic x ray spectroscopy with IDS at PSI

Speaker: Stella Vogiatzi (KU Leuven)

MuX_IDStoPSI.pdf

18:00 → 19:00 Open discussion

Wednesday 12 March

10:00 → 12:00 Steering Committee Meeting: Closed session