Systematics of {alpha}-decay half-lives around shell closures

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024602· OSTI ID:21386607

Ismail, M; Ellithi, A Y; Botros, M M; Adel, A ^[1]

---

1. Physics Department, Faculty of Science, Cairo University (Egypt)

We present a systematic calculation of {alpha}-decay half-lives of even-even heavy and superheavy nuclei in the framework of the preformed {alpha} model. The microscopic {alpha}-daughter nuclear interaction potential is calculated by double-folding the density distributions of both {alpha} and daughter nuclei with a realistic effective Michigan three-Yukawa nucleon-nucleon interaction, and the microscopic Coulomb potential is calculated by folding the charge density distributions of the two interacting nuclei. The half-lives are found to be sensitive to the density dependence of the nucleon-nucleon interaction and the implementation of the Bohr-Sommerfeld quantization condition inherent in the Wentzel-Kramers-Brillouin approach. The {alpha}-decay half-lives obtained agree reasonably well with the available experimental data. Moreover, the study has been extended to the newly observed superheavy nuclei. The interplay of closed-shell effects in {alpha}-decay calculations is investigated. The {alpha}-decay calculations give the closed-shell effects of known spherical magicities, Z=82 and N=126, and further predict enhanced stabilities at N=152,162, and 184 for Z=100,108, and 114, owing to the stability of parent nuclei against {alpha} decays. It is worth noting that the aim of this work is not only to reproduce the experimental data better, but also to extend our understanding of {alpha}-decay half-lives around shell closures.

• OSTI ID: 21386607
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
APPROXIMATIONS
BARYON-BARYON INTERACTIONS
CALCULATION METHODS
CHARGE DENSITY
CLOSURES
CONFIGURATION
COULOMB FIELD
DECAY
DENSITY
DISTRIBUTION
ELECTRIC FIELDS
ELEMENTS
EVEN-EVEN NUCLEI
HADRON-HADRON INTERACTIONS
HALF-LIFE
HEAVY NUCLEI
INTERACTIONS
NUCLEAR DECAY
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES
QUANTIZATION
SIMULATION
SPHERICAL CONFIGURATION
STABILITY
TRANSACTINIDE ELEMENTS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
WKB APPROXIMATION