Observation of electron capture into continuum states of neutral atoms

Energy spectra of electrons ejected in the forward direction from 75-keV/amu He/sup 0/-He,Ar collisions have been measured in coincidence with the charge-state--selected outgoing projectiles He/sup 0/, He/sup +/, and He/sup 2+/. The appearance of the cusp-shaped peak in the electron spectrum in coin...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1989-01, Vol.62 (5), p.527-530
Hauptverfasser:	SARKADI, L, PALINKAS, J, KOVER, A, BERENYI, D, VAJNAI, T
Format:	Artikel
Sprache:	eng
Schlagworte:	640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena ARGON ATOM COLLISIONS ATOM-ATOM COLLISIONS Atomic and molecular collision processes and interactions ATOMIC AND MOLECULAR PHYSICS CAPTURE CHARGE STATE Charge transfer COINCIDENCE METHODS COLLISIONS COULOMB FIELD COUNTING TECHNIQUES DISTANCE ELECTRIC FIELDS ELECTRON CAPTURE ELECTRON EMISSION ELECTRON SPECTRA ELEMENTS EMISSION ENERGY RANGE Exact sciences and technology FLUIDS GASES HELIUM INTERACTION RANGE KEV RANGE KEV RANGE 10-100 NONMETALS Physics PROJECTILES RARE GASES SCREENING SPECTRA
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Beschreibung
Zusammenfassung:	Energy spectra of electrons ejected in the forward direction from 75-keV/amu He/sup 0/-He,Ar collisions have been measured in coincidence with the charge-state--selected outgoing projectiles He/sup 0/, He/sup +/, and He/sup 2+/. The appearance of the cusp-shaped peak in the electron spectrum in coincidence with He/sup 0/ gives the first clear experimental evidence that electron capture into the continuum states (ECC) occurs in collisions where the projectile is a neutral atom. The ECC for He/sup 0/ impact is characterized by a considerably smaller width of the cusp peak than for He/sup +/ impact.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.62.527