Article (Scientific journals)
Laser-probing measurements and calculations of lifetimes of the 5d D-2(3/2) and 5d D-2(5/2) metastable levels in BaII
Gurell, J.; Biémont, Emile; Blagoev, K. et al.
2007In Physical Review. A, Atomic, molecular, and optical physics, 75 (5), p. 1-6
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Abstract :
[en] The two metastable levels 5d(2)D(3/2) and 5d(2) D-5/2 in Ba II both show extremely long lifetimes of the order of several tens of seconds each. This has been found both by experiments and by theoretical predictions. The small transition probabilities associated with these two levels make them interesting and challenging for theoreticians as well as for experimentalists. Several calculations and measurements of these two lifetimes have been made previously but discrepancies between the results are present. This article presents values of τ = 89.4 +/- 15.6 s for the D-2(3/2) level and τ = 32.0 +/- 4.6 s for the D-2(5/2) level measured in a beam-laser experiment performed at the ion storage ring CRYRING. These values are supported by our new calculations resulting in τ= 82.0 s for the D-2(3/2) level and τ= 31.6 s for the D-2(5/2) level.
Disciplines :
Physics
Electrical & electronics engineering
Chemistry
Author, co-author :
Gurell, J.
Biémont, Emile ;  Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Blagoev, K.
Fivet, V.
Lundin, P.
Mannervik, S.
Norlin, L. O.
Quinet, Pascal  ;  Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Rostohar, D.
Royen, P.
Schef, P.
Language :
English
Title :
Laser-probing measurements and calculations of lifetimes of the 5d D-2(3/2) and 5d D-2(5/2) metastable levels in BaII
Publication date :
May 2007
Journal title :
Physical Review. A, Atomic, molecular, and optical physics
ISSN :
1050-2947
eISSN :
1094-1622
Publisher :
American Physical Soc, College Pk, United States - Maryland
Volume :
75
Issue :
5
Pages :
1-6
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 March 2010

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