Microscopic description of low-lying M1 excitations in odd-mass actinide nuclei

被引：15
作者：
Tabar, Emre [1 ,2 ]
Yakut, Hakan [1 ,2 ]
Kuliev, Ali Akbar [3 ]
机构：
[1] Sakarya Univ, Dept Phys, TR-54187 Sakarya, Turkey
[2] Sakarya Univ, Biomed Magnet & Semicond Mat Res Ctr BIMAS RC, TR-54187 Sakarya, Turkey
[3] Azerbaijan Natl Acad Aviat, Baku, Azerbaijan
来源：
NUCLEAR PHYSICS A | 2017年 / 957卷
关键词：
Actinide; Odd-mass; M1; excitations; Scissors mode; Rotational invariance; QPNM; MAGNETIC DIPOLE STRENGTH; DEFORMED-NUCLEI; ISOTOPES; HF;
D O I：
10.1016/j.nuclphysa.2016.07.004
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
A restoration method of a broken symmetry which allows self-consistent determination of the separable effective restoration forces is now adapted to odd-mass nuclei in order to restore violated rotational invariance (RI-) of the Quasiparticle Phonon Nuclear Model (QPNM) Hamiltonian. Because of the self consistency of the method, these effective forces contain no arbitrary parameters. Within RI-QPNM, the properties of the low-lying magnetic dipole excitations in odd-mass deformed Th229-233 and U233-239 nuclei have been investigated for the first time. It has been shown that computed fragmentation of the M1 strengths below 4 MeV in these nuclei is much stronger than that in neighboring doubly even Th228-232 and U232-238 nuclei. For U-235 the summed M1 strength in the energy range 1.5-2.8 MeV is in agreement with the relevant experimental data where the missing strength was extracted by means of a fluctuation analysis. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：33 / 50
页数：18
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