Measurements of distributions of energy loss and additivity of energy loss for 50 to 150 keV protons in hydrogen and nine hydrogen gases

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:7316391

Thorngate, J H

Detailed measurements of energy-loss distributions were made for 51, 102 and 153 keV protons traversing hydrogen, methane, ethyne, ethene, ethane, propyne, propadiene, propene, cyclopropane and propane. Less detailed measurements were made at 76.5 and 127.5 keV. To simplify comparison with theory, all of the measurements were made at a gas density that gave a 4% energy loss. The mean energy, second central moment (a measure of the width of the distribution) and the third central moment (a measure of the skew) were calculated from the measured distributions. Stopping power values, calculated using the mean energy, agreed with the predictions of the theory by Bethe. For the second and third central moments, the best agreement between measurement and theory was obtained when the classical scattering probability was used for the calculations; but the agreement was not good. In all cases, variations were found in the data that could be correlated to the type of carbon binding in the molecule.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 7316391
• Report Number(s): CONF-761059-2
• Country of Publication: United States
• Language: English

Related Subjects

654001* -- Radiation & Shielding Physics-- Radiation Physics
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACETYLENE
ALKANES
ALKENES
ALKYNES
ALLENE
CATIONS
CHARGED PARTICLES
CHARGED-PARTICLE TRANSPORT
CRYOGENIC FLUIDS
CYCLOALKANES
DIENES
ELEMENTS
ENERGY LOSSES
ENERGY RANGE
ETHANE
FLUIDS
HYDROCARBONS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
IONS
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
METHANE
NONMETALS
ORGANIC COMPOUNDS
POLYENES
PROPANE
PROPYLENE
PROPYNE
RADIATION TRANSPORT
STOPPING POWER