Angular differential cross sections for 25-, 50-, and 100-keV-proton excitation of helium to the n = 2 level

Journal Article · Sat Jul 01 00:00:00 EDT 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.18.48· OSTI ID:6949328

Park, J T; George, J M; Peacher, J L; Aldag, J E

Differential cross sections for 25-, 50-, and 100-keV-proton excitation of helium to the n = 2 level have been determined for center-of-mass scattering angles from 0 to 1.2 mrad. The cross sections were obtained from an analysis of the angular distribution of the scattered protons which had lost an energy corresponding to the excitation of the helium target to its n = 2 level. The differential cross section is very sharply peaked in the forward direction and decreases by a factor of 45 in 1.0 mrad at 25 keV and by a factor of 650 in 1.0 mrad at 100 keV. The data are in excellent agreement with a recent multistate eikonal calculation.

• Research Organization: Physics Department, University of Missouri at Rolla, Rolla, Missouri 65401
• OSTI ID: 6949328
• Journal Information: Phys. Rev., A; (United States), Vol. 18:1
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ION-ATOM COLLISIONS
HYDROGEN IONS 1 PLUS
DIFFERENTIAL CROSS SECTIONS
EXCITATION
ION BEAMS
KEV RANGE 10-100
ATOM COLLISIONS
BEAMS
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FLUIDS
HYDROGEN IONS
ION COLLISIONS
IONS
KEV RANGE
NONMETALS
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena