TY - JOUR
T1 - Projectile-charge dependence of inner-shell-ionization cross sections in a high-velocity region
AU - Ishii, K.
AU - Sera, K.
AU - Yamadera, A.
AU - Sebata, M.
AU - Arai, H.
AU - Morita, S.
PY - 1982/1/1
Y1 - 1982/1/1
N2 - Ratios of ionization cross sections for proton impact to those for He-ion3 impact have been measured on Al K and Y L shells at projectile energies of 7, 9, 12, 16, and 21 MeV /amu. The ratio tends to unity with an increase in the projectile energy for both the Al K and Y L ionizations. This behavior can well be explained in terms of the Binstock-Reading theory combined with the distant-collision theory of Hill and Merzbacher: The polarization effect in distant collisions and the decreasing electron-density effect in close collisions cancel out each other in this high-energy region.
AB - Ratios of ionization cross sections for proton impact to those for He-ion3 impact have been measured on Al K and Y L shells at projectile energies of 7, 9, 12, 16, and 21 MeV /amu. The ratio tends to unity with an increase in the projectile energy for both the Al K and Y L ionizations. This behavior can well be explained in terms of the Binstock-Reading theory combined with the distant-collision theory of Hill and Merzbacher: The polarization effect in distant collisions and the decreasing electron-density effect in close collisions cancel out each other in this high-energy region.
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U2 - 10.1103/PhysRevA.25.2511
DO - 10.1103/PhysRevA.25.2511
M3 - Article
AN - SCOPUS:23544472476
VL - 25
SP - 2511
EP - 2518
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 5
ER -