Convoy electrons for collisions between projectile He[sup +] and C foils from 17. 5 to 25 keV/amu

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.850· OSTI ID:6702587

Chu, T C; Lee, C S; Hsu, C C; Chang, Y C; Tsai, J L; Pai, C F ^[1]

---

1. Institute of Nuclear Science, National Tsing Hua University, Hsinchu, Taiwan 300 (Taiwan, Province of China) Department of Physics, National Central University, Chungli, Taiwan 320 (Taiwan, Province of China) Department of Physics, National Tsing Hua University, Hsinchu, Taiwan 300 (Taiwan, Province of China)

Charge-analyzed He[sup +] and He[sup 2+] ions are measured in coincidence with convoy electrons for collisions between He[sup +] ions and carbon foils of 3 and 10 [mu]g/cm[sup 2]. The bombarding energy of the projectile He[sup +] ranges from 17.5 to 25 keV/amu. The results are independent of the thickness of the carbon foils. The cross section of convoy electrons for He[sup 2+] is about 3% of that for He[sup +] in a state of equilibrium resulting from multiple excitations and deexcitations. The transport length [lambda][sub [ital c]] of the convoy electrons is about 2.0[plus minus]1.2 A, which is close to the mean free path of free electrons of the same speed in the carbon foil. This implies that the convoy electrons are produced in the bulk of the foil and survive scattering in a 2.0[plus minus]1.2-A-thick last layer.

• OSTI ID: 6702587
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 51:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CARBON
CHARGED PARTICLES
COLLISIONS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FERMIONS
FOILS
HELIUM IONS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
LEPTONS
MULTICHARGED IONS
NONMETALS
SCATTERING