Extrapolated ranges and stopping cross-sections for alpha particles (0.4-5.5 MeV) in normal and cyclo-hydrocarbons. I. Gases and vapours
- 1 July 1984
- journal article
- research article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 29 (7) , 811-827
- https://doi.org/10.1088/0031-9155/29/7/005
Abstract
The stopping power and ranges of methane, ethane, ethene, n-propane, cyclopropane, n-butane, n-pentane, cyclopentane, n-hexane and benzene for 241Am alpha particles have been measured by the indirect method in which the residual energy is measured as a function of thickness of absorber traversed. Analytical expressions to allow numerical calculations of extrapolated ranges and the stopping cross-sections of the materials investigated are presented and the results are compared where possible with other published results. The standard error of presented range values is 1-2% and that of stopping cross-sections is 2-4%. This work supports the application of the Bragg rule for single and double bonded hydrocarbons.Keywords
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