Multiple outer-shell ionization effect in inner-shell x-ray production by light ions

Journal Article · Sat Nov 01 00:00:00 EST 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.34.3813· OSTI ID:5086453

Lapicki, G; Mehta, R; Duggan, J L; Kocur, P M; Price, J L; McDaniel, F D

L-shell x-ray production cross sections by 0.25--2.5-MeV /sub 2//sup 4/He/sup +/ ions in /sub 28/Ni, /sub 29/Cu, /sub 32/Ge, /sub 33/As, /sub 37/Rb, /sub 38/Sr, /sub 39/Y, /sub 40/Zr, and /sub 46/Pd are reported. The data are compared to the first Born approximation and the ECPSSR theory that accounts for the projectile energy loss (E) and Coulomb deflection (C) as well as the perturbed-stationary-state (PSS) and relativistic (R) effects in the treatment of the target L-shell electron. Surprisingly, the first Born approximation appears to converge to the data while the ECPSSR predictions underestimate them in the low-velocity limit. This is explained as the result of improper use of single-hole fluorescence yields. A heuristic formula is proposed to account for multiple ionizations in terms of a classical probability for these phenomena and, after it is applied, the ECPSSR theory of L-shell ionization is found to be in good agreement with the data.

• Research Organization: Department of Physics, East Carolina University, Greenville, North Carolina 27858
• OSTI ID: 5086453
• Journal Information: Phys. Rev. A; (United States), Vol. 34:5
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ARSENIC
ION COLLISIONS
BROMINE
COPPER
GALLIUM
GERMANIUM
HELIUM IONS
COLLISIONS
SELENIUM
ZINC
BORN APPROXIMATION
INNER-SHELL IONIZATION
KEV RANGE 100-1000
L SHELL
MEV RANGE 01-10
MULTILEVEL ANALYSIS
X RADIATION
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
HALOGENS
IONIZATION
IONIZING RADIATIONS
IONS
KEV RANGE
METALS
MEV RANGE
NONMETALS
RADIATIONS
SEMIMETALS
TRANSITION ELEMENTS
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions