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Inclusion of electric octupole contributions explains the fast radiative decays of two metastable states in Ar+
KTH, School of Engineering Sciences (SCI), Physics.
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2007 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 99, no 21, 213001- p.Article in journal (Refereed) Published
Abstract [en]

A laser probing investigation has yielded the lifetimes of the 3s(2)3p(4)(D-1)3d (2)G(7/2,9/2) metastable doublet states of Ar+. The results, obtained with the CRYRING ion storage ring of Stockholm, are 3.0 +/- 0.4 and 2.1 +/- 0.1 s, respectively. Comparisons with theoretical values calculated with two independent theoretical approaches, i.e., the pseudorelativistic Hartree-Fock method and the multiconfiguration Breit-Pauli approach, have allowed us to establish the unexpected and extraordinary strong contribution of an electric octupole (E3) transition to the ground state, in addition to the M1 decay channels to the 3d F-2,F-4 states and the E2 contributions to the 4s P-2, D-2 states.

Place, publisher, year, edition, pages
2007. Vol. 99, no 21, 213001- p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-37071DOI: 10.1103/PhysRevLett.99.213001ISI: 000251107500017ScopusID: 2-s2.0-36248947367OAI: diva2:431975
Available from: 2011-07-28 Created: 2011-07-28 Last updated: 2011-07-28Bibliographically approved

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Norlin, Lars-Olov
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