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decay of exotic P and S isotopes with neutron number near 28Tripathi, V.*; Bhattacharya, S.*; Rubino, E.*; Benetti, C.*; Perello, J. F.*; Tabor, S. L.*; Liddick, S. N.*; Bender, P. C.*; Carpenter, M. P.*; Carroll, J. J.*; et al.
Physical Review C, 106(6), p.064314_1 - 064314_14, 2022/12
被引用回数：2 パーセンタイル：47.44(Physics, Nuclear)ミシガン州立大学の国立超伝導サイクロトロン研究所にて、中性子過剰なリン、硫黄同位体を生成し、そこからのベータ崩壊半減期および娘核の励起準位を測定した。
Pの崩壊によって得られるエネルギー準位から、この原子核の基底状態は
あるいは
であることが示唆された。中性子数が偶数の硫黄同位体からの崩壊様式を系統的に調べた結果、中性子数が増えるにつれてガモフテラー遷移強度の大きな準位の励起エネルギーが高くなることがわかった。これは、大規模殻模型計算によって予言されている現象に一致する。
0 transition strength for 
Se using the SPICE spectrometerSmallcombe, J.; Garnsworthy, A. B.*; Korten, W.*; Singh, P.*; Ali, F. A.*; Andreoiu, C.*; Ansari, S.*; Ball, G. C.*; Barton, C. J.*; Bhattacharjee, S. S.*; et al.
Physical Review C, 106(1), p.014312_1 - 014312_9, 2022/07
被引用回数：3 パーセンタイル：61.19(Physics, Nuclear)The selenium isotopes lie at the heart of a tumultuous region of the nuclear chart where shape coexistence effects grapple with neutron-proton pairing correlations, triaxiality, and the impending proton dripline. In this work a study of Se by internal conversion electron and 
-ray spectroscopy was undertaken with the SPICE and TIGRESS arrays. New measurements of the branching ratio and lifetime of the 
state were performed yielding a determination of 
milliunits. Two state mixing calculations were performed that highlighted the importance of interpretation of such 
strength values in the context of shape-coexistence.
Se nuclear shapes with SPICE and TIGRESSSmallcombe, J.; Garnsworthy, A. B.*; Korten, W.*; Singh, P.*; Ali, F. A.*; Andreoiu, C.*; Ansari, S.*; Ball, G. C.*; Barton, C. J.*; Bhattacharjee, S. S.*; et al.
no journal, ,
The phenomenon of shape coexistence is prevalent in the Z
34 region, with isotopes of neutron-deficient even Ge, Se and Kr each exhibiting the characteristic low-lying coexisting 0+ bands which display quadrupole deformation different to that of the ground states. In the selenium isotopes, 
Se seem to show a prolate ground structure with shape coexisting oblate excitation, while in 
Se the oblate structure appears to have become the ground state. The exact nature of the low-lying structure 
Se and any shape coexistence remains uncertain. Combining the Spectrometer for Internal Conversion Electrons (SPICE) with the TIGRESS HPGe Array, a full electron and gamma-ray experimental study of Se, Se was undertaken at the TRIUMF ISAC-II facility to unveil the low-lying structure of these nuclei. Details of the device and experiment will be presented, alongside the experimental results and possible structural interpretations for both isotopes.
