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2007-01-01 - Article/Dans un journal avec peer-review - Anglais - 4 page(s)

Lundin P., Gurell J., Norlin L.-O., Royen P., Mannervik S., Palmeri Patrick , Quinet Pascal , Fivet Vanessa, Biémont Emile , "Inclusion of electric octupole contributions explains the fast radiative decays of two metastable states in Ar+" in Physical Review Letters, 99, 21, 1-4, 213001

  • Edition : American Physical Society, Ridge (NY)
  • Codes CREF : Physique atomique et moléculaire (DI1220), Mécanique quantique classique et relativiste (DI1211)
  • Unités de recherche UMONS : Astrophysique et spectroscopie (S804)
Texte intégral :

Abstract(s) :

(Anglais) A laser probing investigation has yielded the lifetimes of the 3s23p4(1D)3d 2G7/2,9/2 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 2,4F states and the E2 contributions to the 4s 2P, 2D states.

Notes :
  • (Anglais) Lecture en ligne: http://www.physto.se/~gurell/Lundin%20et%20al.pdf
Identifiants :
  • DOI : 10.1103/PhysRevLett.99.213001