High-resolution atomic beam study of the helium excimer potentials He/sub 2/(A,C /sup 1/. sigma. /sub u , g//sup +/). [18 to 140 millielectron volts]

Journal Article · Mon Mar 28 00:00:00 EST 1977 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.38.686· OSTI ID:7120298

Brutschy, B; Haberland, H

The long-range parts of the A,C /sup 1/..sigma../sub u , g//sup +/ excimer potentials of the He/sub 2/ molecule have been accurately determined from high-resolution differential-cross-section measurements at the relative kinetic energy range from 18 to 140 meV. The barrier height of the intermediate maximum of the A/sup 1/..sigma../sub u//sup +/ potentials is 47/sup +2//sub -//sub 1/ meV at an internuclear distance of 3.14 +- 0.05 A. The long-range parts of the potential from the recent ab initio calculation by Guberman and Goddard is always 5 to 20 meV higher than the potential determined from our experiments.

• Research Organization: Fakultaet fuer Physik der Universitaet Freiburg, Freiburg, Germany
• OSTI ID: 7120298
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 38:13
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ATOM-ATOM COLLISIONS
INTERATOMIC FORCES
ATOMIC BEAMS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
MILLI EV RANGE
ATOM COLLISIONS
BEAMS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY RANGE
EV RANGE
FLUIDS
NONMETALS
RARE GASES
SCATTERING
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena