Persistent discrepancy between experimental and theoretical lifetimes for Ni-

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)

[thumbnail of Si-etal-PRA-2017-Persistent-discrepancy-between-experimental-and-theoretical-lifetimes]
Preview
 Text. Filename: Si_etal_PRA_2017_Persistent_discrepancy_between_experimental_and_theoretical_lifetimes.pdf
Final Published Version
License: Strathprints license 1.0
Download (123kB)| Preview

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.

  • 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:14 Apr 2024 01:01
    URI:https://strathprints.strath.ac.uk/id/eprint/82930
CORE (COnnecting REpositories)