Analysis of the 2s$sup 2$ $sup 1$S, 2p$sup 2$ $sup 1$D, and 2s2p $sup 1$P autoionizing levels of helium, in proton--helium collisions

Journal Article · Mon Oct 01 00:00:00 EDT 1973 · J. Phys., B (London), v. 6, no. 10, pp. 1997-2009

OSTI ID:4378182

Bordenave-Montesquieu, A; Gleizes, A; Rodiere, M; Benoit-Cattin, P

Using Fano's formula, the three resonances associated with the 2s/sup 2/ /sup 1/S, 2p/sup 2/ /sup 1/D and 2s2p /sup 1/P autoionizing levels of helium were parametrized. They were observed in energy spectra of ejected electrons produced by proton-helium collisions. For the /sup 1/S resonance, the variations with electron emission angle of the shape parameter q and the resonant continuum cross section sigma /s/sub r/ in the angular range 16.5 to 160 deg , for 150-keV protons were determined. The dependence on proton energy of these parameters was also obtained for 16.5 deg angle, in the energy range 14 to 150 keV. Additional results concern the variation of the profile parameters for /sup 1/D and /sup 1/P resonances, with ejection angle, at 150 keV. (auth)

• Research Organization: Paul Sabatier Univ., Toulouse
• NSA Number: NSA-29-008635
• OSTI ID: 4378182
• Journal Information: J. Phys., B (London), v. 6, no. 10, pp. 1997-2009, Journal Name: J. Phys., B (London), v. 6, no. 10, pp. 1997-2009; ISSN JPBAB
• Country of Publication: United Kingdom
• Language: English

Related Subjects

*HELIUM-- ION-ATOM COLLISIONS
*HYDROGEN IONS 1 PLUS-- ION-ATOM COLLISIONS
ANGULAR DISTRIBUTION
AUTOIONIZATION
COLLISIONS
CROSS SECTIONS
D STATES
ELECTRON EMISSION
ELECTRON LOSS
ENERGY SPECTRA
FANO FACTOR
INTERACTIONS
KEV RANGE 10-100
KEV RANGE 100-1000
N60200* --Physics (Atomic & Molecular)--Atomic & Molecular Properties
N60400 --Physics (Atomic & Molecular)--Collision Phenomena
P STATES
PROTONS
RESONANCE
S STATES