First Double Excitation Cross Sections of Helium Measured for 100-keV Proton Impact

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.5230· OSTI ID:554424

Moretto-Capelle, P; Bordenave-Montesquieu, D; Bordenave-Montesquieu, A ^[1]; Godunov, A L; Schipakov, V A ^[2]

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1. Laboratoire Collisions, Agregats, Reactivite, IRSAMC, UMR 5589, CNRS and Universite Paul Sabatier, 31062 Toulouse Cedex (France)
2. Troitsk Institute for Innovation and Fusion Research, Troitsk, Moscow region, 142092 (Russia)

Excitation cross sections of the (2s{sup 2}){sup 1}S, (2p{sup 2}){sup 1}D , and (2s2p){sup 1}P autoionizing states of helium, produced in collisions with 100-keV protons, have been measured for the first time. Using a high resolution electron spectroscopy together with a recently proposed parametrization of autoionizing resonances distorted by Coulomb interaction in the final state makes it possible to extract from electron spectra {ital total cross sections} as well as {ital magnetic sublevel populations.} These new experimental data are briefly compared with out theoretical calculations. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 554424
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
AUTOIONIZATION
ELECTRON SPECTROSCOPY
EXCITATION
HELIUM
HYDROGEN IONS 1 PLUS
ION-ATOM COLLISIONS
KEV RANGE 10-100
TOTAL CROSS SECTIONS