194Hg激发超形变态中的运动学窄化与遍历带

Motional narrowing and ergodic bands in excited superdeformed states of 194Hg.

作者信息

Lopez-Martens A, Døssing T, Khoo T L, Matsuo M, Herskind B, Lauritsen T, Carpenter M P, Janssens R V F, Hackman G, Lee I-Y, Macchiavelli A O, Vigezzi E, Yoshida K

机构信息

C.S.N.S.M, IN2P3-CNRS, Batiment 104-108, 91405 Orsay, France.

出版信息

Phys Rev Lett. 2008 Mar 14;100(10):102501. doi: 10.1103/PhysRevLett.100.102501.

DOI:10.1103/PhysRevLett.100.102501

PMID:18352178

Abstract

The E(gamma) - E(gamma) coincidence spectra from the electromagnetic decay of excited superdeformed states in (194)Hg reveal surprisingly narrow ridges, parallel to the diagonal. A total of 100-150 excited bands are found to contribute to these ridges, which account for nearly all the unresolved E2 decay strength. Comparison with theory suggests that these excited bands have many components in their wave functions, yet they display remarkable rotational coherence. This phenomenon can be explained in terms of the combination of shell effects and motional narrowing.

摘要

来自（194）Hg中激发态超形变电磁衰变的E（γ）-E（γ）符合谱显示出令人惊讶的狭窄脊线，与对角线平行。发现总共100 - 150个激发带对这些脊线有贡献，这些脊线几乎占了所有未分辨的E2衰变强度。与理论的比较表明，这些激发带的波函数中有许多成分，但它们表现出显著的转动相干性。这种现象可以用壳效应和运动学窄化的组合来解释。