Hyperfine Quenching of the 2s2p 3P0 State of Berylliumlike Ions

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The hyperfine-induced 2s2p {sup 3}P{sub 0}-2s{sup 2} {sup 1}S{sub 0} transition rate for Be-like {sup 47}Ti{sup 18+} was recently measured in a storage-ring experiment by Schippers et al. [Phys. Rev. Lett. 98, 033001 (2007)]. The measured value of 0.56(3) s{sup -1} is almost 60% larger than the theoretical value of 0.356 s{sup -1} from a multiconfiguration Dirac-Fock calculation by Marques et al. [Phys. Rev. A 47, 929 (1993)]. In this work, we use a large-scale relativistic configuration-interaction method to calculate these hyperfine-induced rates for ions with Z = 6-92. Coherent hyperfine-quenching effects between the 2s2p {sup 1,3}P{sub 1} states are ... continued below

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Cheng, K T; Chen, M H & Johnson, W R March 13, 2008.

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The hyperfine-induced 2s2p {sup 3}P{sub 0}-2s{sup 2} {sup 1}S{sub 0} transition rate for Be-like {sup 47}Ti{sup 18+} was recently measured in a storage-ring experiment by Schippers et al. [Phys. Rev. Lett. 98, 033001 (2007)]. The measured value of 0.56(3) s{sup -1} is almost 60% larger than the theoretical value of 0.356 s{sup -1} from a multiconfiguration Dirac-Fock calculation by Marques et al. [Phys. Rev. A 47, 929 (1993)]. In this work, we use a large-scale relativistic configuration-interaction method to calculate these hyperfine-induced rates for ions with Z = 6-92. Coherent hyperfine-quenching effects between the 2s2p {sup 1,3}P{sub 1} states are included in a perturbative as well as a radiation damping approach. Contrary to the claims of Marques et al., contributions from the {sup 1}P{sub 1} state are substantial and lead to a hyperfine-induced rate of 0.67 s{sup -1}, in better agreement with, though larger than, the measured value.

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PDF-file: 30 pages; size: 0.3 Mbytes

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  • Journal Name: Physical Review A, vol. 77, no. 5, May 1, 2008, pp. 052504; Journal Volume: 77; Journal Issue: 5

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  • Report No.: LLNL-JRNL-402318
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 945154
  • Archival Resource Key: ark:/67531/metadc899722

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  • March 13, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 7, 2016, 3:23 p.m.

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Cheng, K T; Chen, M H & Johnson, W R. Hyperfine Quenching of the 2s2p 3P0 State of Berylliumlike Ions, article, March 13, 2008; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc899722/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.