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APS » Journals » Phys. Rev. C » Volume 55 » Issue 4
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Phys. Rev. C 55, 1665–1675 (1997)

Ionic charge dependence of the internal conversion coefficient and nuclear lifetime of the first excited state in 125Te

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F. Attallah1, M. Aiche1, J. F. Chemin1, J. N. Scheurer1, W. E. Meyerhof2, J. R. Grandin3, P. Aguer4, G. Bogaert4, C. Grunberg5, J. Kiener4, A. Lefebvre4, and J. P. Thibaud4
1Centre d’Etudes Nucléaires de Bordeaux-Gradignan, IN2P3-CNRS, Université de Bordeaux, Boı̂te Postale 117, F-33175 Gradignan, France
2Department of Physics, Stanford University, Stanford, California 94305
3Centre Interdisciplinaire de Recherche avec les Ions Lourds, CEA-CNRS, Boı̂te Postale 5133, F-14040 Caen, France
4Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, IN2P3-CNRS, Université d’Orsay, F-91405 Orsay, France
5Grand Accélérateur National d’Iond Lourds, Boı̂te Postale 5027, F-14021 Caen, France

Received 21 October 1996; published in the issue dated April 1997

We have studied the ionic charge state dependence of the nuclear lifetime of the 35.5-keV first excited state of 125Te. We found for the 47+ and 48+ ions, 400 and 670 % variations with respect to the neutral-atom half-life (1.49 ns). These unusually large effects are due to the energetic blocking of the K-shell internal conversion as the charge state increases past 47+. For the 46+, we suggest a new internal conversion mode without any electron emission into the energy continuum.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.55.1665
DOI:
10.1103/PhysRevC.55.1665
PACS:
23.20.Nx, 21.10.Tg, 27.60.+j
 
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