Angular differential and total cross sections for the excitation of atomic hydrogen to its n = 2 level by 25--150-keV hydrogen molecular ions
Experimentally and theoretically determined differential and total cross sections are reported for excitation of atomic hydrogen to its n = 2 level by 25--150-keV hydrogen molecular ions. The differential cross sections decrease 3--4 orders of magnitude over the measured center-of-mass scattering-angular range from 0 to 4.5 mrad. The results of a first Born approximation and two other theoretical calculations based upon the Glauber approximation are presented and compared with the experimental results. Both calculations based on the Glauber approximation agree fairly well with the experimental results. The Born approximation agrees moderately well with the experimental results at the very small scattering angles but is well below the experimental results at the larger scattering angles. None of the theoretical calculations presented agree well with the total cross section. However, the results for the total cross section of the two calculations based on the Glauber approximation agree with the experimental results in curve shape better than the Born-approximation results.
- Research Organization:
- Physics Department, University of MissouriRolla, Rolla, Missouri 65401
- OSTI ID:
- 6529406
- Journal Information:
- Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 30:2; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOM COLLISIONS
BORN APPROXIMATION
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
GLAUBER THEORY
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 2 PLUS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
MOLECULAR IONS
NONMETALS
SCATTERING
SMALL ANGLE SCATTERING
TOTAL CROSS SECTIONS