Persistent discrepancy between experimental and theoretical lifetimes for Ni-

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Si, R. and Zhang, C. Y. and Yao, K. and Brage, T. and Chen, C. Y. and Zou, Y. M. (2017) Persistent discrepancy between experimental and theoretical lifetimes for Ni-. Physical Review A, 95 (4). 042504. ISSN 2469-9926 (https://doi.org/10.1103/PhysRevA.95.042504)

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Abstract

Recently the lifetime of the excited 3d94s22D3/2 in Ni- was measured to be 15.1±0.4 s [Phys. Rev. A 93, 012512 (2016)2469-992610.1103/PhysRevA.93.012512]. This deviates from results from nonrelativistic, within the LS-approximation, calculations for this forbidden magnetic-dipole transition of 18.88 s [J. Phys. B 50, 025001 (2017)JPAPEH0953-407510.1088/1361-6455/50/2/025001]. We here present elaborate and fully relativistic multiconfiguration Dirac-Hartree-Fock calculations, to explore this difference. Our calculated transition energy 1485.65cm-1 is in excellent agreement with the experimental 1485±3cm-1 [Phys. Rev. A 58, 2051 (1998)PLRAAN1050-294710.1103/PhysRevA.58.2051]. However the lifetime of 18.86 s, while agreeing well with the nonrelativistic analytical value, deviates from experiment by 25%. The uncertainties of our calculated wavelength and lifetime are estimated to be better than 0.1% and 1%, respectively. In spite of including a careful investigation of contributions from correlation as well as higher-order relativistic effects, we cannot find any explanation from the structure theory for this deviation.

ORCID iDs

Si, R., Zhang, C. Y. ORCID logoORCID: https://orcid.org/0000-0003-1935-6907, Yao, K., Brage, T., Chen, C. Y. and Zou, Y. M.;
  • Item type:Article
    ID code:82930
    Dates:
    Date
    Event
    11 April 2017
    Published
    1 April 2017
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:26 Oct 2022 10:24
    Last modified:19 Dec 2024 01:30
    URI:https://strathprints.strath.ac.uk/id/eprint/82930
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