Geometrical effect on the measurement of stopping power: Angle-dependent energy loss of 7-MeV protons in metallic and organic thin foils
Energy losses of 7-MeV protons in metallic and organic thin foils have been obtained as a function of emergence angles. Angular distributions due to multiple scattering have been also measured. The energy loss is found to increase for all targets with increasing emergence angles. The increase of the energy loss cannot be explained by the following three effects: (1) the increase of the target thickness caused by the deflection of the particle, (2) the increase of the path length due to multiple scattering with atomic nuclei, and (3) the energy transfer to the recoil nuclei during the multiple-scattering process. From this consideration, the observed increase of the energy loss with increasing emergence angle is concluded to be due to a hitherto unknown effect. This effect is very likely the dependence of the energy loss on the average impact parameter with the atomic nucleus.
- Research Organization:
- Department of Physics, Nara Women's University, Nara 630, Japan
- OSTI ID:
- 5226814
- Journal Information:
- Phys. Rev. A; (United States), Vol. 25:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM
CHARGED-PARTICLE TRANSPORT
BERYLLIUM
CELLOPHANE
MYLAR
PROTONS
ENERGY LOSSES
SILVER
ANGULAR DISTRIBUTION
EXPERIMENTAL DATA
FOILS
IMPACT PARAMETER
MEV RANGE 01-10
MULTIPLE SCATTERING
STOPPING POWER
ALKALINE EARTH METALS
BARYONS
CARBOHYDRATES
DATA
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ESTERS
FERMIONS
HADRONS
INFORMATION
LOSSES
MATERIALS
METALS
MEV RANGE
NUCLEONS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYESTERS
POLYMERS
POLYSACCHARIDES
RADIATION TRANSPORT
SACCHARIDES
SCATTERING
SYNTHETIC MATERIALS
TRANSITION ELEMENTS
654001* - Radiation & Shielding Physics- Radiation Physics
Shielding Calculations & Experiments