L-shell x-ray production cross sections in Nd, Gd, Ho, Yb, Au and Pb for 25-MeV carbon and 32-MeV oxygen ions
L-shell x-ray production cross sections in /sub 60/Nd, /sub 64/Gd, /sub 67/Ho, /sub 70/Yb, /sub 79/Au and /sub 82/Pb have been measured for incident 25 MeV /sub 6//sup 12/C/sup +q/(q = 4,5,6) and 32 MeV /sub 8//sup 16/O/sup +q/(q = 5,7,8) ions. Measurements were made on targets ranging in thickness from 1 to 100 ..mu..g/cm/sup 2/. Echancement in the L-shell x-ray production cross section for projectiles with one or two K-shell vacancies over those for projectiles with no K-shell vacancies is observed. The sum of direct ionization to the continuum (DI) plus electron capture (EC) to the L,M,N ... shells and EC to the K-shell of the projectile have been extracted from the data. Calculations in the first Born approximation are approx. 10 times larger than the data. Predictions of the ECPSSR theory that accounts for the energy-loss, Coulomb deflection, perturbed-stationary state, and relativistic effects are in good agreement with the data for both ions.
- Research Organization:
- North Texas State Univ., Denton (USA). Dept. of Physics; East Carolina Univ., Greenville, NC (USA). Dept. of Physics; Oak Ridge National Lab., TN (USA); Texas Univ., Arlington (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5923561
- Report Number(s):
- CONF-841117-48; ON: DE85006924
- Resource Relation:
- Conference: 8. conference on the application of accelerators in research and industry, Denton, TX, USA, 12 Nov 1984; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
L- and M-shell x-ray production cross sections of neodymium, gadolinium, holmium, ytterbium, gold, and lead by 25-MeV carbon and 32-MeV oxygen ions
M-shell electron capture and direct ionization of gold by 25-MeV carbon and 32-MeV oxygen ions
Related Subjects
GENERAL PHYSICS
CARBON IONS
ION-ATOM COLLISIONS
GADOLINIUM
GOLD
HOLMIUM
LEAD
NEODYMIUM
OXYGEN IONS
YTTERBIUM
BORN APPROXIMATION
K SHELL
L SHELL
MEV RANGE 10-100
MULTICHARGED IONS
X RADIATION
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
ION COLLISIONS
IONIZING RADIATIONS
IONS
METALS
MEV RANGE
RADIATIONS
RARE EARTHS
TRANSITION ELEMENTS
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions