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M-shell electron capture and direct ionization of gold by 25-MeV carbon and 32-MeV oxygen ions

Conference ·
OSTI ID:6046810
; ; ; ; ; ; ; ; ;
M-shell x-ray production cross sections have been measured for thin solid targets of Au for 25 MeV /sup 12/C/sup q+/ (q = 4, 5, 6) and for 32 MeV /sup 16/O/sup q+/ (q = 5, 7, 8). The microscopic cross sections were determined from measurements made with targets ranging in thickness from 0.5 to 100 ..mu..g/cm/sup 2/. For projectiles with one or two K-shell vacancies, the M-shell x-ray production cross sections are found to be enhanced over those by projectiles without a K-shell vacancy. The sum of direct ionization to the continuum (DI) and electron capture (EC) to the L, M, N ... shells and EC to the K-shell of the projectile have been extracted from the data. The results are compared to the predictions of first Born theories i.e. PWBA for DI and OBK of Nikolaev for EC and the ECPSSR approach that accounts for energy loss, Coulomb deflection and relativistic effects in the perturbed stationary state theory. 25 references, 3 figures, 1 table.
Research Organization:
North Texas State Univ., Denton (USA); Oak Ridge National Lab., TN (USA); Texas Univ., Arlington (USA); East Carolina Univ., Greenville, NC (USA)
DOE Contract Number:
AC05-84OR21400
OSTI ID:
6046810
Report Number(s):
CONF-841117-47; ON: DE85006923
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CARBON IONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
GOLD
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
K SHELL
M SHELL
METALS
MEV RANGE
MEV RANGE 10-100
MULTICHARGED IONS
OXYGEN IONS
SPECTRA
TRANSITION ELEMENTS
X-RAY SPECTRA