Abstract
Abstract
In the present work, we systematically study the α decay half-lives of neptunium (Z = 93) isotopes within a one-parameter model (OPM). The calculated results are in reasonable agreement with the experimental data. Noticeably, the recently measured α decay half-life value of
380
−
110
+
260
ns for 222Np [Phys. Rev. Lett.
125, 032 502 (2020)] has been fairly reproduced by the OPM as 780 ns within a factor of ≈2. In addition, we extend this model to predict α decay half-lives of neptunium isotopes whose α decay is energetically allowed or observed but not yet quantified in NUBASE2016. Meanwhile, it is found that the half-life between the neutron number N = 126 and N = 128 in Np drop sharply, this result shows that the N = 126 shell closure is still very robust at Z = 93. At last, α particle preformation probability
P
α
extd
are extracted in two cases with α transition orbital angular momentum l = 0 and l = 1, we find a amazing phenomenon that the
P
α
extd
are basically the same for α transition with the same orbital angular momentum l.
Funder
Natural Science Foundation of Hunan Province
Construct Program of the Key Discipline in Hunan Province
Natural Science Foundation of Shandong Province
University of South China
Hunan Provincial Innovation Foundation for Postgraduate
National Natural Science Foundation of China
Subject
Condensed Matter Physics,Mathematical Physics,Atomic and Molecular Physics, and Optics
Cited by
22 articles.
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