Abstract
The spectra ofK x-rays emitted by the target-like reaction products in the deep inelastic collisions 1,160-MeV136Xe+Pb and136Xe+232Th were investigated. Target-like x-ray emission probabilities per projectile-like and per target-like product were determined and compared with theoretical predictions of atomic vacancy production in the higher-Z particle (1s }-vacancy production). It is shown that a large fraction of the x-rays is produced by internal conversion ofγ-rays in the higher-Z reaction product. Measurement of target-like x-rays in coincidence with projectile-like and with target-like reaction products allowed the determination of the average survival probability against fission and of theZ-distribution of the highly excited target-like nuclei as a function of theQ value (total kinetic energy loss). The observed average survival probabilities agree qualitatively with theoretical predictions of Wilcke et al. Nuclearreaction-time effects on the 1s σ-vacancy production in these collisions could not be demonstrated with any certainty.
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Work supported in part by the National Science Foundation (grant PHY 80-15438)
Recipient of Swiss National Science Foundation Fellowship (1979-80).
Recipient of NATO Fellowship (1979).
Recipient of Alexander von Humboldt Foundation Senior U.S. Scientist Award (1980–81)
Helpful discussions with J. Huizenga, L. Moretto, W. Nörenberg and H. Sann are gratefully acknowledged. Communications by G. Soff were very useful to us. One of us (W.E.M.) is indebted to the the Alexander von Humboldt Foundation for an award which made possible prolonged stays at the Institute of Theoretical Physics of the University of Frankfurt where encouragement and stimulation helped to further this experiment.
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Stoller, C., Chemin, J.F., Anholt, R. et al. X-ray study of the deep inelastic reactions 1,160-MeV136Xe+Pb and136Xe+232Th. Z Physik A 310, 9–17 (1983). https://doi.org/10.1007/BF01433605
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DOI: https://doi.org/10.1007/BF01433605