Accession Number : ADD095491

Title :   Stopping Powers and Ranges of Electrons and Positions,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Berger, M J ; Seltzer, S M

Report Date : Aug 1982

Pagination or Media Count : 167

Abstract : Tables of stopping powers and related data are given for electrons in 37 elements and 60 compounds, and for positions in 8 materials. The tables include (1) collision stopping powers (2) radiative stopping powers, (3) total stopping powers, (4) ranges (computed in the continuous-slowing-down approximation), (5) radiation yields (fraction of electron energy converted into bremsstrahlung), and (6) the logarithmic derivatives of all these quantities with respect to the mean excitation energy of the medium. These results are given at 81 energies between 1000 MeV and 10 keV. Restricted collision stopping powers are tabulated for selected materials, with cut-off energies of 1, 10 and 100 keV. The principal new ingredients in the preparation of these tables were: (1) a revision and updating of the mean excitation energies which enter into the Bethe stopping-power formula, on the basis of the best available data from stopping-power measurements and analyses of experimental oscillator-strength distributions and dielectric-response functions; (2) use of the general formulation of Sternheimer and Peierls for the density-effect correcting to the collision stopping power; and (3) use of theoretical bremsstrahlung cross sections of Tseng and Pratt. (Author)

Descriptors :   *ELECTRONS, *POSITRONS, STOPPING, POWER, COLLISIONS, RADIATION, RANGE(DISTANCE), RELAXATION, ELECTRON ENERGY, ENERGY CONVERSION, BREMSSTRAHLUNG, EXCITATION, MEASUREMENT, OSCILLATORS, STRENGTH(GENERAL), DISTRIBUTION, DIELECTRIC PROPERTIES, YIELD, MATHEMATICAL ANALYSIS, TABLES(DATA)

Subject Categories : Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE