Caurier E, Nowacki F, Poves A
IReS, Bât27, IN2P3-CNRS/Université Louis Pasteur, BP 28, Strasbourg, France.
Phys Rev Lett. 2005 Jul 22;95(4):042502. doi: 10.1103/PhysRevLett.95.042502. Epub 2005 Jul 19.
Large scale shell model calculations in the valence space spanned by two major oscillator shells (sd and pf) describe simultaneously the superdeformed excited band of 36Ar and its spherical ground state. We explain the appearance of this superdeformed band at low excitation energy as a consequence of the very large quadrupole correlation energy of the configurations with many particles and many holes (np-nh) relative to the normal filling of the spherical mean field orbits (0p-0h). We study the mechanism of mixing between the different configurations to understand why the superdeformed band survives and how it finally decays into the low-lying spherical states via the indirect mixing of the 0p-0h and 4p-4h configurations.
在由两个主要振子壳层（sd和pf）所跨越的价空间中进行的大规模壳模型计算，同时描述了(^{36}Ar)的超形变激发带及其球形基态。我们将这种低激发能下超形变带的出现解释为，相对于球形平均场轨道的正常填充（0p - 0h），具有许多粒子和许多空穴（np - nh）的组态具有非常大的四极关联能的结果。我们研究不同组态之间的混合机制，以理解超形变带为何能够存续，以及它最终如何通过0p - 0h和4p - 4h组态的间接混合衰变为低能球形态。
