Energy loss and straggling of protons and helium ions traversing some thin solid foils
Absolute measurements of stopping powers and energy straggling for hydrogen- and helium-ion beams in Ge, Se, Pd, Ag, Sb, and Bi in the energy range 20 < or = E < or = 260 keV were performed by the method of determining the energy loss suffered by an ion beam which has traversed a thin film. The measured stopping powers fit reasonably well with those of other authors obtained at higher and lower ion energies. Agreement with theoretical predictions for energies >100 keV/amu is found to be better for hydrogen than it is for helium beams. The Z/sub 2/ dependence of the stopping power for hydrogen projectiles is discussed including measurements of other authors performed on other elements, and is found to agree in shape with that for helium for ion velocities v > 2 a.u., but there is evidence that it begins to differ with decreasing v. It is deduced from the present measurements that for hydrogen as well as helium ions the amplitude of oscillations of the Z/sub 2/ dependence increases with decreasing ion velocity, reaching a maximum at v = 1.4 a.u. The Lindhard-Scharff theory is found to be in satisfactory agreement with the measured energy straggling.
- Research Organization:
- Comision Nacional de Energia Atomica, Centro Atomico Bariloche, S.C. de Bariloche, R.N., Argentina
- OSTI ID:
- 6672943
- Journal Information:
- Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 18:2; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Beams & their Reactions
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANTIMONY
BEAMS
BISMUTH
CATIONS
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY LOSSES
ENERGY RANGE
GERMANIUM
HELIUM 4 BEAMS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION BEAMS
ION COLLISIONS
IONS
KEV RANGE
KEV RANGE 10-100
METALS
PALLADIUM
PLATINUM METALS
SELENIUM
SEMIMETALS
SILVER
STOPPING POWER
TRANSITION ELEMENTS