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Analysis of the coincidence method for comparing atomic and nuclear lifetimes

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

A fully quantum-mechanical analysis is presented of the process in which an incident proton excites both a nuclear resonance and, by electron emission, also a hole in theK-shell which then decays by X-ray emission. The ratio of the intensities of the X-rays emitted before and after compound-nucleus decay is calculated (a) for the case of an isolated nuclear resonance, and (b) for strongly overlapping resonances. We show that in both cases the measured quantity is a branching ratio. The influence of the energy-resolution of the detectors, of the energy spread of the incident beam, and of the structure of the wave packets describing the individual particles in the incident beam is discussed.

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Authors and Affiliations

  1. Max-Planck-Institut für Kernphysik, Heidelberg, Federal Republic of Germany

    K. W. McVoy, X. T. Tang & H. A. Weidenmüller

Authors
  1. K. W. McVoy
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  2. X. T. Tang
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  3. H. A. Weidenmüller
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Additional information

Senior US-scientist Humboldt awardee. On leave from Department of Physics, University of Wisconsin, Madison, Wisconsin, USA

On leave from Institute for Atomic Physics, Academia Sinica, Peking, China. Supported by DAAD, Bonn, FRG

The authors are grateful to M. Kleber for having pointed out an incorrect formulation in the original manuscript.

Two of the authors (KWM and XTT) are pleased to have this opportunity to express their gratitude for the warm hospitality extended to them by the Max-Planck-Institut für Kernphysik in Heidelberg, where this work was carried out.

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McVoy, K.W., Tang, X.T. & Weidenmüller, H.A. Analysis of the coincidence method for comparing atomic and nuclear lifetimes. Z Physik A 299, 195–200 (1981). https://doi.org/10.1007/BF01443936

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  • DOI: https://doi.org/10.1007/BF01443936

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