Enhanced α decays to negative-parity states in even-even nuclei with octupole deformation

被引：7
|
作者：
Seif, W. M. [1 ,2 ]
Adel, A. [1 ]
Antonenko, N. V. [3 ]
Adamian, G. G. [3 ]
机构：
[1] Cairo Univ, Fac Sci, Dept Phys, Giza 12613, Egypt
[2] Cairo Univ, Fac Postgrad studies Nanotechnol, Giza 12588, Egypt
[3] Joint Inst Nucl Res, Dubna 141980, Russia
来源：
PHYSICAL REVIEW C | 2023年 / 107卷 / 04期
关键词：
INTRINSIC REFLECTION ASYMMETRY; COULOMB-EXCITATION; FUSION; ISOTOPES; PART; MASS;
D O I：
10.1103/PhysRevC.107.044601
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：
The alpha decays of even-even Ra, Th, U, and Pu isotopes to ground and excited states of daughter nuclei with neutron numbers of N = 130-140 are investigated. These nuclei show some enhanced alpha-branching ratios to negative-parity states (1-, 3-), compared with the decays to positive-parity states (4+) of comparable energy. This enhancement correlates with appearance of static octupole deformation, rather than spherical nuclear shapes or dynamic asymmetric vibrational states. The highly enhanced branching ratios occur for alpha decays to the 1- and 3- states of the Ra isotopes with N = 134, 136, 138, then to 1- state in Th (N = 134-140) and to the 3- state in Rn (N = 132-136) isotopes.
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页数：9
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