X-ray spectroscopy of electronic quasimolecules. II. Emission anisotropy of selected K molecular-orbital transitions

Journal Article · Fri Jan 15 00:00:00 EST 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.37.426· OSTI ID:5512639

Zouros, T J.M.; Liarokapis, E; Greenberg, J S

The emission anisotropy of selected K molecular-orbital (MO) transitions has been measured by exploiting the cascade relationship between MO x rays emitted in transitions from the (2psigma,..pi../sub x/) MO's into the 1ssigma MO and the characteristic K x ray which follows from the filling of the ensuing vacancy in the projectile or target atoms after their separation. For 40-MeV Ni+Ni collisions the anisotropy is found to exhibit a photon-energy dependence similar to the singles MO x-ray anisotropy but with a striking tenfold increase in overall magnitude. The large positive anisotropy observed for the MO coincidence spectrum, in agreement with theory, thus provides one of the more direct and convincing illustrations of the role played by the MO mechanism in slow ion-atom collisions.

• Research Organization: A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511
• OSTI ID: 5512639
• Journal Information: Phys. Rev. A; (United States), Vol. 37:2
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
NICKEL
ATOM-ATOM COLLISIONS
X-RAY SPECTRA
ANISOTROPY
ATOMS
DIMERS
K SHELL
MEV RANGE 10-100
TRANSIENTS
ATOM COLLISIONS
COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
METALS
MEV RANGE
SPECTRA
TRANSITION ELEMENTS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena