Differences in straggling for positrons and electrons
- Nuclear Physics Laboratory, University of Illinois, Champaign, Illinois 61820 (US)
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899
A satisfactory analysis of the physics of straggling was first given by Landau, who approximated the electron-electron cross section for hard collisions by the Rutherford cross section. Data analysis computer codes continue to use the distribution derived by Landau to calculate the energy lost by electrons because of straggling. We have performed a study of straggling distributions incorporating Moeller and Bhabha cross sections to evaluate the precision of ({ital e},{ital e}{prime}) analyses that use the Rutherford-based Landau formula. In addition, the calculation of the {ital e}{sup +} straggling distribution is relevant to the analysis of experiments that have been proposed to study dispersive effects in nuclear electromagnetic processes by comparing results obtained from {ital e}{sup {minus}} and {ital e}{sup +} scattering from identical nuclei. Measuring differences in such cross sections requires a high degree of confidence in the data analysis. Since accuracies in cross sections on the order of a few percent are required, any differences in energy-loss mechanisms of the same order must be taken into account. In this work, we study the differences in positron and electron straggling at energies of present-day interest.
- OSTI ID:
- 5459030
- Journal Information:
- Physical Review (Section) C: Nuclear Physics; (USA), Journal Name: Physical Review (Section) C: Nuclear Physics; (USA) Vol. 40:4; ISSN 0556-2813; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BHABHA SCATTERING
CHARGED-PARTICLE TRANSPORT
COULOMB FIELD
COUPLED CHANNEL THEORY
CROSS SECTIONS
DISPERSION RELATIONS
ELASTIC SCATTERING
ELECTRIC FIELDS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY LOSSES
FERMIONS
LEPTONS
LOSSES
MOELLER SCATTERING
POSITRONS
RADIATION TRANSPORT
RUTHERFORD SCATTERING
SCATTERING