Messung der mittleren Lebensdauern des 748 keV- und des 776 keV-Niveaus in51Cr |
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Authors: | W. Haar F. W. Richter |
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Affiliation: | 1. Physikalisches Institut der Universit?t Marburg a. d. Lahn, Deutschland
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Abstract: | Using theγ-radiation of 748 and 28 keV the half-lives of the first two excited states in51Cr at 748 and 776 keV have been measured by a pulsed beam technique. The interesting states were populated by the reaction51V(p, nγ)51Cr at 4 MeV proton energy. The half-lives were found to beT 1/2(51Cr, 748 keV)=(7.35±0.03) ns andT 1/2(51Cr, 776 keV)=(5.53±0.07) ns. The influence of the 28 keV transition between the two levels upon the lifetime of the 748 keV state has been investigated. The 776 keV-state populates the 748 keV state only by 8.4%. The lifetime of the 776 keV state, therefore, cannot account for the anomalous long lifetime of the level at 748 keV as has been proposed by Bartholomew et al. |
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