L-subshell ionization cross sections for proton bombardment of Ag, In, Sn, and I
L--x-ray production cross sections were measured for thin targets of Ag, In, Sn, and I in the proton energy range 0.300--5.000 MeV. Subshell ionization cross sections were extracted and compared with existing data and with the predictions of plane-wave Born approximation (PWBA), perturbed--stationary-state theory including energy loss, Coulomb deflection and relativistic corrections (ECPSSR), binary-encounter approximation with corrections accounting for binding effect and Coulomb retardation (BEABC), and semiclassical approximation taking into account binding, energy loss, Coulomb deflection, and relativistic effects (SCABCR). Large disagreement was found with PWBA, but the other theories reproduced the experimental data rather well. Owing to the nodal structure of the 2s wave function, deeper insight was achieved by considering the ratios of the subshell ionization cross sections. These results were found to be in good agreement with analogous measurements on high-Z elements and favor the ECPSSR over the other theories. A realistic value for the ..omega../sub 1/ fluorescence yield was suggested for indium near the discontinuity at Zapprox.50.
- Research Organization:
- Istituto di Fisica Sperimentale, Universita degli Studi di Napoli, I-80125 Napoli, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, I-80125 Napoli, Italy
- OSTI ID:
- 5375574
- 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
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BORN APPROXIMATION
CATIONS
CHARGED PARTICLES
COLLISIONS
CORRECTIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION SPECTRA
ENERGY RANGE
HALOGENS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INDIUM
INNER-SHELL IONIZATION
IODINE
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONIZING RADIATIONS
IONS
KEV RANGE
KEV RANGE 100-1000
L SHELL
METALS
MEV RANGE
MEV RANGE 01-10
NONMETALS
PSS METHOD
RADIATIONS
SILVER
SPECTRA
TIN
TRANSITION ELEMENTS
X RADIATION