Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
61 (1992), S. 360-362
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Modified Bethe–Bloch theory of stopping power provides for inclusion of several parameters in the Bethe–Bloch formula. These parameters include the target mean excitation energy and those associated with target shell corections, with the low-velocity projectile-z3 (Barkas effect) term, and with an effective charge factor. Fits of stopping power measurements permit extraction of one or two (and sometimes three) parameter values while the remaining parameters are assigned fixed values based on other studies. Omission of one or more of the required correction terms or factors induces distortions in the values of the extracted parameters. A recent development has been omission of the (parameter independent) high-velocity Barkas effect term in an analysis where projectile energies were sufficiently high to necessitate inclusion of this term. The importance of incorporating all pertinent terms and factors into the modified Bethe–Bloch formula is strenuously emphasized.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.107943
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