Approaching 100Sn : Structural evolution in 98,100Cd via lifetime measurements
(2025) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 863.- Abstract
The lifetimes of low-lying excited states below the 8+ seniority isomer were directly measured using fast timing detectors in the neutron-deficient isotopes 98,100Cd. This experiment was conducted with the DEcay SPECtroscopy (DESPEC) setup at GSI, where the ions of interest were produced via a fragmentation reaction and identified using the FRagment Separator (FRS) before being implanted in the AIDA active stopper system, and the γ rays emitted during the de-excitation of isomeric states were detected by the LaBr3 FATIMA Array. The newly deduced values for the reduced transition probabilities were compared with shell-model calculations using different interactions and effective charges. The results... (More)
The lifetimes of low-lying excited states below the 8+ seniority isomer were directly measured using fast timing detectors in the neutron-deficient isotopes 98,100Cd. This experiment was conducted with the DEcay SPECtroscopy (DESPEC) setup at GSI, where the ions of interest were produced via a fragmentation reaction and identified using the FRagment Separator (FRS) before being implanted in the AIDA active stopper system, and the γ rays emitted during the de-excitation of isomeric states were detected by the LaBr3 FATIMA Array. The newly deduced values for the reduced transition probabilities were compared with shell-model calculations using different interactions and effective charges. The results indicate that, while 98Cd aligns well with a seniority scheme description, in 100Cd the transition strengths among low-lying states are not fully reproduced, and the nature of these states remains an open problem within the present theoretical description. Ultimately, a key element in the description of this region, crucial for nuclear physics and astrophysics, appears to be the proton-neutron term of the nuclear effective interaction.
(Less)
- author
- Zhang, G.
; Zyriliou, A.
; Cox, D.
LU
; Hrabar, Y.
LU
and Sarmiento, L. G. LU
- author collaboration
- organization
- publishing date
- 2025-04
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Gamma-ray spectroscopy, Lifetime measurement, Nuclear structure, Radioactive beams
- in
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 863
- article number
- 139378
- publisher
- Elsevier
- external identifiers
-
- scopus:86000508900
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2025.139378
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2025 The Author(s)
- id
- 59dafbea-25ca-4732-9ce6-0a4ff4fa7567
- date added to LUP
- 2025-10-07 14:05:40
- date last changed
- 2025-10-08 09:18:00
@article{59dafbea-25ca-4732-9ce6-0a4ff4fa7567, abstract = {{<p>The lifetimes of low-lying excited states below the 8<sup>+</sup> seniority isomer were directly measured using fast timing detectors in the neutron-deficient isotopes <sup>98,100</sup>Cd. This experiment was conducted with the DEcay SPECtroscopy (DESPEC) setup at GSI, where the ions of interest were produced via a fragmentation reaction and identified using the FRagment Separator (FRS) before being implanted in the AIDA active stopper system, and the γ rays emitted during the de-excitation of isomeric states were detected by the LaBr<sub>3</sub> FATIMA Array. The newly deduced values for the reduced transition probabilities were compared with shell-model calculations using different interactions and effective charges. The results indicate that, while <sup>98</sup>Cd aligns well with a seniority scheme description, in <sup>100</sup>Cd the transition strengths among low-lying states are not fully reproduced, and the nature of these states remains an open problem within the present theoretical description. Ultimately, a key element in the description of this region, crucial for nuclear physics and astrophysics, appears to be the proton-neutron term of the nuclear effective interaction.</p>}}, author = {{Zhang, G. and Zyriliou, A. and Cox, D. and Hrabar, Y. and Sarmiento, L. G.}}, issn = {{0370-2693}}, keywords = {{Gamma-ray spectroscopy; Lifetime measurement; Nuclear structure; Radioactive beams}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}}, title = {{Approaching <sup>100</sup>Sn : Structural evolution in <sup>98,100</sup>Cd via lifetime measurements}}, url = {{http://dx.doi.org/10.1016/j.physletb.2025.139378}}, doi = {{10.1016/j.physletb.2025.139378}}, volume = {{863}}, year = {{2025}}, }