Sarazin F, Savajols H, Mittig W, Nowacki F, Orr NA, Ren Z, Roussel-Chomaz P, Auger G, Baiborodin D, Belozyorov AV, Borcea C, Caurier E, Dlouhy Z, Gillibert A, Lalleman AS, Lewitowicz M, Lukyanov SM, Penionzhkevich YE, Ridikas D, Sakurai H, Tarasov O
GANIL, BP 5027, F-14076 Caen Cedex 05, France.
Phys Rev Lett. 2000 May 29;84(22):5062-5. doi: 10.1103/PhysRevLett.84.5062.
The masses of 31 neutron-rich nuclei in the range A = 29-47 have been measured. The precision of 19 masses has been significantly improved and 12 masses were measured for the first time. The neutron-rich Cl, S, and P isotopes are seen to exhibit a change in shell structure around N = 28. Comparison with shell model and relativistic mean field calculations demonstrate that the observed effects arise from deformed prolate ground state configurations associated with shape coexistence. Evidence for shape coexistence is provided by the observation of an isomer in 43S.
已测量了A = 29 - 47范围内31个富中子核的质量。其中19个质量的精度得到了显著提高，12个质量是首次测量。发现富中子的氯、硫和磷同位素在N = 28附近呈现出壳结构变化。与壳模型和相对论平均场计算的比较表明，观察到的效应源于与形状共存相关的变形长椭球基态构型。43S中同质异能素的观测提供了形状共存的证据。
