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Proton-stopping cross sections and mean excitation energies for gaseous Cl/sub 2/ and Br/sub 2/

Journal Article · · Phys. Rev. A; (United States)
First measurements of proton stopping powers in gaseous Cl/sub 2/ and Br/sub 2/ are reported for the energy range between 50 and 750 keV with statistical and systematical errors of about 1% each. In the stopping-power maximum the experimental values are higher than those predicted by the Andersen-Ziegler tables; moreover, lower peak energies are found. Experimental shell corrections were deduced from the proton stopping cross sections and adjusted to the theoretical predictions of Bonderup, whereby higher-order Z/sub 1/ correction terms were included. Within this procedure semiempirical values for the mean ionization potentials of 174 eV for Cl/sub 2/ and 363 eV for Br/sub 2/ were obtained.
Research Organization:
Institut fuer Kernphysik, Strahlenzentrum der Justus-Liebig-Universitaet Giessen, D-6300 Giessen, Federal Republic of Germany
OSTI ID:
5374043
Journal Information:
Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 28:5; ISSN PLRAA
Country of Publication:
United States
Language:
English