M-shell electron capture and direct ionization of gold by 25-MeV carbon and 32-MeV oxygen ions
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
- Resource Relation:
- Conference: 8. conference on the application of accelerators in research and industry, Denton, TX, USA, 12 Nov 1984; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON IONS
ION-ATOM COLLISIONS
GOLD
OXYGEN IONS
CROSS SECTIONS
IONIZATION
K SHELL
M SHELL
MEV RANGE 10-100
MULTICHARGED IONS
X-RAY SPECTRA
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
ION COLLISIONS
IONS
METALS
MEV RANGE
SPECTRA
TRANSITION ELEMENTS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena