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Projectile dependence of single-K multiple-L shell vacancy production in argon: A universal scaling of

Journal Article · · Phys. Rev., A; (United States)
Argon K..cap alpha.. x-ray satellites produced by ion collisions have been analyzed in high resolution. Ions of H, C, N, O, F, Si, and Cl with energies in the range 1--5 MeV/amu were used to bombard argon contained in a gas cell. This study is the first systematic study of K x-ray satellites from free-atom targets with Z > 10. The relative satellite intensities and satellite energies are tabulated and their projectile dependence is qualitatively discussed. The average number of L-shell vacancies formed in single-K-vacancy-producing collisions is determined from a model calculation based on theoretical decay rates. This model includes (i) the variation in fluorescence yield, and (ii) the variation in L-shell rearrangement with the number of L-shell and M-shell electrons. The averages obtained from the model calculation are nearly the same as the < l > values obtained by weighting the x-ray satellites equally. A universal scaling of < l> in Z/sub 1/ and projectile velocity is obtained on the basis of an increased binding effect. This is the first successful demonstration of a scaling law for multiple ionization by heavy ions.
Research Organization:
Department of Physics, Kansas State University, Manhattan, Kansas 66502
OSTI ID:
6565428
Journal Information:
Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 18:5; ISSN PLRAA
Country of Publication:
United States
Language:
English