Abstract
Using particle x-ray coincidence techniques, the probability forK shell ionization has been measured absolutely at two impact parameters for collisions of 5.8 MeV/amu208Pb on Ag and Au. In the asymmetric collision system Pb-Ag, the 1sσ excitation probability of the PbK shell is 2.2% at 25 fm impact parameter, and an exponential probability distribution falls off too quickly to account for the measured total cross section. For the symmetric system Pb-Au, the latter conclusion is also made for the 2pσ excitation probability although in this case, the probability is much larger being 29% at 42 fm.
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On sabbatical leave from Kansas State University and partially supported by USERDA Division of Physical Research
The authors acknowledge the technical support of W. Enders and computation assistance of Dr. R. Hadsell to the successful outcome of this experiment. One of us (J.R.M.) would like to thank Prof. P. Armbruster and the Atomic Physics group at GSI for their hospitality and stimulation during a sabbatical leave at GSI.
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Macdonald, J.R., Armbruster, P., Behncke, H.H. et al. An absolute measurement of the probability for 1s σ and 2p σ excitation of the leadK shell. Z Physik A 284, 57–59 (1978). https://doi.org/10.1007/BF01433875
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DOI: https://doi.org/10.1007/BF01433875