MONTE CARLO CALCULATIONS ON INTRANUCLEAR CASCADES. II. HIGH-ENERGY STUDIES AND PION PROCESSES

Journal Article · Tue Apr 01 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.110.204· OSTI ID:4331425

Metropolis, N; Bivins, R; Storm, M; Miller, J M; Friedlander, G; Turkevich, A

The nuclear cascade calculations described in the precedng paper have been extended to incident energies up to 1.8 Be with the inclusion of pion production, scattering, and absorption processes. Again the MANIAC electronic computer was used. Several incident proton energies between 450 Mev and 1.8 Bev have been investigated, with Al/sup 27/, Cu/sup 64/, Ru/sup 100/, Ce/sup 140/, Bi/sup 209/, and U/sup 2 38/ as target nuclei. Cascades initiated by pions of several energies up to 1500 Mev incident on Ru/sup 100/ have also been studied. The elementary cross sections used and the assumptions made about details of the ineiastic nucleon-nucleon and pionnucleon processes are presented. The results of the calculation are summarized in tables and graphs giving data on transparencies, on numbers, energy spectra, and angular distributions of emitted cascade nucleons and pions, and on frequencies of occurrence and excitation energies of residual nuclei. The computed number of distributions, energy spectra, and angular distributions of emitted particles are compared with the results of several emulsion experiments with incident protons and negative pions. The agreement is generally satisfactory, but certain discrepancies are found, for example regardng spectra and angular distributions of emitted pions; some of these discrepancies are discussed in terms of details of the model used. The calculation predicts quite well the over-all yield distribution of spallation products of copper produced by 2Bev protons; however, as at lower energies, the calculated cross sections for (p,pn) reactions are too low by factors of two or three. (auth)

• Research Organization: Los Alamos Scientific Lab., N. Mex; Columbia Univ., New York; Brookhaven National Lab., Upton, N.Y.; Univ. of Chicago
• NSA Number: NSA-12-008682
• OSTI ID: 4331425
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 110; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION-- ALUMINUM 27-- ANGULAR DISTRIBUTION-- BISMUTH 209-- CERIUM 140-- COMPUTERS-- COPPER-- COPPER 64-- CROSS SECTIONS-- ENERGY LEVELS-- ENERGY RANGE-- EXCITATION-- FISSION PRODUCTS-- FREQUENCY-- INTERACTIONS-- MONTE CARLO METHOD-- NUCLEAR CASCADE-- NUCLEAR EMULSIONS-- NUCLEAR MODELS-- NUCLEAR REACTIONS-- NUCLEI-- NUCLEONS-- NUMERICALS-- PIONS-- PIONS-MINUS- - PRODUCTION-- PROTON BEAMS-- RUTHENIUM 100-- SCATTERING-- SPECTRA-- TARGETS-- TRANSIENTS-- URANIUM 238
ABSORPTION-- ANGULAR DISTRIBUTION-- BEAMS-- COMPUTERS-- COPPER-- CROSS SECTIONS-- ENERGY LEVELS-- ENERGY RANGE-- EXCITATION-- FISSION PRODUCTS-- FREQUENCY-- INTERACTIONS-- MONTE
PHYSICS