Quasimolecular x-ray spectroscopy for slow Cl/sup 16+/-Ar collisions

Journal Article · Sun May 01 00:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.37.3313· OSTI ID:5310387

Schuch, R; Meron, M; Johnson, B M; Jones, K W; Hoffmann, R; Schmidt-Boecking, H; Tserruya, I

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), Journal Name: Phys. Rev. A; (United States) Vol. 37:9; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
CHARGED PARTICLES
CHLORINE IONS
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FLUIDS
GASES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MEV RANGE
MEV RANGE 01-10
MOLECULAR IONS
MULTICHARGED IONS
NONMETALS
RARE GASES
SPECTRA
TRANSIENTS
X-RAY SPECTRA