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Half-lives of alpha-decaying nuclei in the medium-mass region within the transfer matrix method
Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China..
KTH, School of Engineering Sciences (SCI), Physics. Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China.;KTH Royal Inst Technol, Dept Phys, S-10691 Stockholm, Sweden..
Tongji Univ, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China..
2018 (English)In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 5, article id 054316Article in journal (Refereed) Published
Abstract [en]

The alpha-decay half-lives of even-even nuclei from Sm to Th are systematically studied based on the transfer matrix method. For the nuclear potential, a type of cosh-parametrized form is applied to calculate the penetration probability. Through a least-squares fit to experimental half-lives, we optimize the parameters in the potential and the a preformation factor P-0. During this process, P-0 is treated as a constant for each parent nucleus. Eventually, the calculated half-lives are found to agree well with the experimental data, which verifies the accuracy of the present approach. Furthermore, in recent studies, P-0 is regulated by the shell and paring effects plus the nuclear deformation. To this end, P-0 is here associated with the structural quantity, i.e., the microscopic correction of nuclear mass (E-mic). In this way, the agreement between theory and experiment is greatly improved by more than 20%, validating the appropriate treatment of P-0 in the scheme of E-mic.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 97, no 5, article id 054316
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-230448DOI: 10.1103/PhysRevC.97.054316ISI: 000433012100002Scopus ID: 2-s2.0-85047244388OAI: oai:DiVA.org:kth-230448DiVA, id: diva2:1217421
Note

QC 20180613

Available from: 2018-06-13 Created: 2018-06-13 Last updated: 2018-06-13Bibliographically approved

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