In-beam γ -ray spectroscopy of 94 Ag

X. Pereira-López*, M. A. Bentley, R. Wadsworth, P. Ruotsalainen, S. M. Lenzi, U. Forsberg, K. Auranen, A. Blazhev, B. Cederwall, T. Grahn, P. Greenlees, A. Illana, D. G. Jenkins, R. Julin, H. Jutila, S. Juutinen, X. Liu, R. Llewelyn, M. Luoma, K. MoschnerC. Müller-Gatermann, B. S.Nara Singh, F. Nowacki, J. Ojala, J. Pakarinen, P. Papadakis, P. Rahkila, J. Romero, M. Sandzelius, J. Sarén, H. Tann, S. Uthayakumaar, J. Uusitalo, J. G. Vega-Romero, J. M. Vilhena, R. Yajzey, W. Zhang, G. Zimba

*Corresponding author for this work

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A recoil-beta-tagging experiment has been performed to study the excited T= 0 and T= 1 states in the odd–odd N= Z nucleus 94Ag, populated via the 40Ca(58Ni,1p3n)94Ag reaction. The experiment was conducted using the MARA recoil separator and JUROGAM3 array at the Accelerator Laboratory of the University of Jyväskylä. Through correlating fast, high-energy beta decays at the MARA focal plane with prompt γ rays emitted at the reaction target, a number of transitions between excited states in 94Ag have been identified. The timing characteristics of these transitions confirm that they fall within decay sequences that feed the short-lived T= 1 ground state of 94Ag. The transitions are proposed to proceed within and between the sets of states with T= 0 and T= 1. Possible correspondence between some of these transitions from analog states in 94Pd has been discussed, and shell-model calculations including multipole and monopole electromagnetic effects have been presented, in order to enable predictions of the decay patterns between the T= 0 and T= 1 states and to allow a theoretical set of Coulomb energy differences to be calculated for the A= 94 T= 1 analog states.

Original languageEnglish
Article number44
Number of pages8
JournalEuropean Physical Journal A
Issue number3
Publication statusPublished - 15 Mar 2023

Bibliographical note

© 2023, The Author(s).

Funding Information:
The authors thank the GAMMAPOOL European Spectroscopy Resource for the loan of the detectors for the JUROGAM III array. Support has also been provided by the EU 7th framework programme, Project No. 262010 (ENSAR). We wish to acknowledge support from the UK STFC under Grants nos. ST/L005727/1, ST/P003885/1, ST/V001035/1, the Ministry of Science and ICT (Grant no. IBS-R031-D1). U. Forsberg would like to thank Birgit and Hellmuth Hertz’ Foundation for financial support. C. Müller-Gatermann acknowledges the support of the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. J. G. Vega-Romero acknowledges CONACYT financial support.

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