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Persistent discrepa...
Persistent discrepancy between experimental and theoretical lifetimes for Ni-
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- Si, R. (author)
- Lund University,Fudan University
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- Zhang, C. Y. (author)
- Fudan University
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- Yao, K (author)
- Fudan University
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- Brage, T. (author)
- Lund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Chen, C. Y. (author)
- Fudan University
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- Zou, Y. M. (author)
- Fudan University
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(creator_code:org_t)
- 2017
- 2017
- English.
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In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 95:4
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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