Hyperfine quenching and precision measurement of the 2 sup 3 P sub 0 -2 sup 3 P sub 1 fine-structure splitting in heliumlike gadolinium (Gd sup 62+ )

Journal Article · Mon Mar 02 00:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.1307· OSTI ID:7234488

Indelicato, P; Birkett, B B; Briand, J; Charles, P; Dietrich, D D; Marrus, R; Simionovici, A ^[1]

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1. Laboratoire de Physique Atomique et Nucleaire, Institut de Radium, Universite Pierre et Marie Curie, T12 Boite 93, 75252 Paris CEDEX 05 (France) Department of Physics, University of California, Berkeley, California 94720 (United States) Lawrence Livermore National Laboratory, L-296, P.O. Box 808, Livermore, California 94550 (United States) Laboratoire Grenoblois de Recherches sur les Ions, les Plasmas et la Physique Atomique, Centre d'Etudes Nucleaires de Grenoble, Boite Postale 85X, 38041 Grenoble CEDEX (France)

The hyperfine-quenched transition 2{sup 3}{ital P}{sub 0-}1{sup 1}{ital S}{sub 0} has been observed in heliumlike gadolinium (Gd{sup 62+}) in the two isotopes {sup 155}Gd and {sup 157}Gd. The lifetime for the transition ({tau}{sub 0}) has been measured for each isotope and found to be {tau}{sub 0}(155)=13.43(27){times}10{sup {minus}12} sec and {tau}{sub 0}(157)=7.65(55){times}10{sup {minus}12} sec. From the measured lifetimes a value is inferred for the absolute value of the 2{sup 3}{ital P}{sub 0-}2{sup 3}{ital P}{sub 1} fine-structuring splitting {vert bar}{Delta}{ital E}{sub 0-1}{vert bar} in Gd{sup 62+} with the result {vert bar}{Delta}{ital E}{sub 0-1}{vert bar}=18.57(19) eV, where the error represents 1 standard deviation. This result is compared with calculations based on the multiconfiguration Dirac-Fock method and on the unified method.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7234488
• Journal Information: Physical Review Letters; (United States), Vol. 68:9; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
GADOLINIUM IONS
FINE STRUCTURE
LIFETIME
ACCURACY
COMPARATIVE EVALUATIONS
ERRORS
EXPERIMENTAL DATA
GADOLINIUM 155
GADOLINIUM 157
HYPERFINE STRUCTURE
RADIATIVE DECAY
X-RAY SPECTRA
CHARGED PARTICLES
DATA
DECAY
EVALUATION
EVEN-ODD NUCLEI
GADOLINIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
IONS
ISOTOPES
NUCLEI
NUMERICAL DATA
PARTICLE DECAY
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPECTRA
STABLE ISOTOPES
664200* - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)