Pion-induced spallation of copper across the (3,3) resonance

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.1426· OSTI ID:6947139

Orth, C J; Dropesky, B J; Williams, R A; Giesler, G C; Hudis, J

Cross sections for about two dozen radioactive spallation products have been measured 50-, 100-, 190-, and 350-MeV ..pi../sup + -/ and for 200- and 350-MeV proton interactions with copper. Some of measured pion-induced cross sections at 50 and 350 MeV are about the same as for protons of 200 and 590 MeV, respectively. However, at 100 and 190 MeV, nearer to the (3,3) pion-nucleon resonance, these pion-induced cross section sums are 50 to 75% greater than those for protons of similar total energy. Ratios of the ..pi../sup -/ to ..pi../sup +/ cross sections are greater than unity for neutron-rich products and less than unity for neutron-deficient products at all four energies, indicating that pion absorption is a substantial reaction mode, even at 190 and 350 MeV. At 100 MeV, and especially at 50 MeV, absorption appears to dominate over inelastic scattering and the sigma/sub ..pi..//sup -//sigma/sub ..pi..//sup +/ ratios are noticeably changed from those at the higher energies. The intranuclear cascade plus evaporation codes reproduce the proton cross sections fairly well. The pion version of the intranuclear cascade code reproduces the pion results quite well at 350 MeV, but is underestimates them significantly at 50 and 100 MeV.

• Research Organization: Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6947139
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651625* -- Nuclear Properties & Reactions
A=59-89
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
COPPER
CROSS SECTIONS
ELEMENTS
ENERGY RANGE
EVAPORATION MODEL
GAMMA SPECTRA
HADRON REACTIONS
INELASTIC SCATTERING
MATHEMATICAL MODELS
MESON REACTIONS
METALS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
PROTON REACTIONS
RESONANCE SCATTERING
SCATTERING
SPALLATION
SPECTRA
TRANSITION ELEMENTS