Energy loss of carbon-transmitted 1-MeV H[sub 2][sup +] ions
- Department of Engineering Science, Kyoto University, Kyoto 606-01 (Japan)
Energy losses of 1-MeV H[sub 2][sup +] ions passing through carbon foils of 2--8 [mu]g/cm[sup 2] thickness have been measured. The observed energy loss increases linearly with the target thickness and shows an offset, 0.4 keV, at zero thickness. The stopping power derived from the observed energy losses is 1.15 times as large as the sum of the stopping powers for two single H[sup +] of the same velocity. Stopping powers for H[sub 2][sup +] ions and diprotons are calculated with the first Born approximation. The calculated stopping power for the diproton agrees quite well with the one observed. This indicates that the observed H[sub 2][sup +] ions traverse the target as diprotons after the loss of the binding electrons upon entrance into the foil and recapture target electrons at the exit surface. The observed energy-loss offset at zero thickness also supports this scenario.
- OSTI ID:
- 7071835
- Journal Information:
- Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:3; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMIC IONS
CARBON
CHANNELING
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
ELEMENTS
ENERGY LOSSES
ENERGY RANGE
EVALUATION
FOILS
HYDROGEN IONS
ION CHANNELING
IONS
LOSSES
MEV RANGE
MEV RANGE 01-10
MOLECULAR IONS
NONMETALS
STOPPING POWER