Determination of charge distributions for 6 and 8 MeV/amu Xe ions traveling in solids from L x-ray measurements

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:199660

Horvat, V; Watson, R L; Parameswaran, R ^[1]

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1. Texas A&M Univ., College Station, TX (United States)

Measurements of the spectra of L x rays emitted by fast Xe ions traveling in solids were performed with a crystal spectrometer. The L x-ray structure displayed a strong dependence on the target atomic number. Spectra obtained with low-Z targets were characterized by partially resolved peaks which broadened and merged together as the target atomic number increased beyond Z = 6. Moreover, the energies of the principal spectral components systematically decreased as Z increased. The main components of the spectra were identified to be L{alpha}, and L{beta}{sub 1} pairs from projectile initial states having 1 to 4 L-shell vacancies. From comparisons of the spectra obtained with both thick and thin targets, it was concluded that the L x-ray structure closely mirrors the equilibrium charge distribution. This rather unique circumstance is a consequence of the fact that, at 6 and 8 MeV/amu, the existence of at least one L shell vacancy is highly probable in a charge-equilibrated Xe ion, while the existence of a K-shell vacancy is highly improbable. Detailed spectral analysis enabled extraction of fundamental parameters which characterized the L- and M-shell population distributions as well as the charge distributions of the projectile ions inside the solid targets.

• OSTI ID: 199660
• Report Number(s): CONF-941129--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHARGE DISTRIBUTION
CHARGE STATES
GEV RANGE 01-10
HEAVY ION REACTIONS
L SHELL
MEV RANGE 100-1000
SOLIDS
X-RAY SPECTRA
XENON IONS