Spectroscopic study of 97 Mo, 99 Mo, and 101 Mo
[ X ]
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Physical Soc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Excited states of the molybdenum isotopes 97,99,101 42 Mo have been populated in two experiments which used fusion-fission and binary grazing reactions to populate yrast states of the nuclei of interest. In the first experiment, the GASP array of escape-suppressed Ge detectors was used to detect gamma rays from fusion-fission products initiated by the interaction of a 230-MeV beam of 36S ions with a thick target of 176Yb. In the multinucleon transfer experiment, a 530-MeV beam of 96Zr ions was incident on a thin 124Sn target; projectile-like ejectiles were detected and identified using the PRISMA magnetic spectrometer and their associated gamma rays were detected using the CLARA array of escape-suppressed Ge detectors. In 99Mo, the previously known positive-parity vd5/2 decay sequence was extended to spin (25/2+) while, in 101Mo, a similar, but hitherto unobserved vg7/2 positive-parity decay sequence was established to spin (27/2+). In 99Mo and in 101Mo, previously observed vh11/2 negative-parity decay sequences were also observed to spin 27/2-. Although the observed decay sequences in 97Mo have not been extended beyond the results of earlier work, a disagreement in the published level structure of the h11/2 band has been resolved. The observed positive-parity decay sequences have been compared with the results of state-of-the-art shell-model calculations; the general features of the energy spectrum of excited states of 97Mo, 99Mo, and 101Mo are reproduced, but not in detail. The experimental energies of the negative-parity states of 99Mo and 101Mo are reasonably well reproduced in particle-rotor (PRM) calculations. For 97Mo, better agreement with the high-spin states was obtained when the core in the PRM calculations was treated in a variable moment of inertia approach. For the vh11/2 negative-parity decay sequences of the three isotopes studied here, model-dependent evidence is presented for nuclear shape changes with increasing neutron number.
Açıklama
Anahtar Kelimeler
Nuclear-Data Sheets, Ground-State, Shell-Model, Spin States, Half-Life, Mo-97, Deformation, Detector, Band, Isotopes
Kaynak
Physical Review C
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
110
Sayı
4
