Quasimolecular x-ray spectroscopy for slow Cl/sup 16+/-Ar collisions
Quasimolecular x-ray transitions into the 1ssigma orbital of the Cl/sup 16+/-Ar collision system were measured in coincidence with scattered particles for collision energies of 20, 10, 5, and 2.5 MeV. The acceleration-deceleration method was used to produce K-shell vacancy bearing projectiles at low velocities. Because K-shell vacancies were brought into the collisions, the excited states of the transient quasimolecules could decay by x-ray emission either on the incoming or on the outgoing parts of the collision trajectory. The resulting interference structures in the quasimolecular x-ray spectra are clearly observed for impact parameters between 600 and 3000 fm. The analysis of these spectra has produced the first experimental determinations of 2p..pi..-1ssigma transition energies as a function of internuclear distance. Details of the experimental procedure, results, and analysis are presented; the velocity and impact-parameter dependencies of spectral decay widths are investigated; and the effects of collision broadening for quasimolecular x rays are discussed.
- Research Organization:
- Physikalisches Institut, Universitaet Heidelberg, D-6900 Heidelberg, Federal Republic of Germany
- OSTI ID:
- 5310387
- Journal Information:
- Phys. Rev. A; (United States), Vol. 37:9
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coincidence studies of quasimolecular electron emission in 700-keV Ar sup 2+ -Kr collisions
Emission anisotropy of x-rays from selected transitions in electronic quasimolecules
Related Subjects
ARGON
ION-ATOM COLLISIONS
CHLORINE IONS
COINCIDENCE METHODS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
MEV RANGE 01-10
MOLECULAR IONS
MULTICHARGED IONS
TRANSIENTS
X-RAY SPECTRA
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
COUNTING TECHNIQUES
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
ION COLLISIONS
IONS
MEV RANGE
NONMETALS
RARE GASES
SPECTRA
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena