Spallation of Cu by 500- and 1570-MeV. pi. /sup -/
Relative yields of 36 products extending from /sup 7/Be to /sup 65/Zn have been measured for the interaction of 500- and 1570-MeV negative pions with Cu. These results are compared with calculations from the ISOBAR model, with earlier studies of Cu spallation with lower (resonance) energy pions, energetic protons, and heavy ions. Relative yield patterns at both ..pi../sup -/ energies show only slight differences when compared to spallation by protons of comparable energy. Calculations from the ISOBAR model adequately reproduce the shapes of the mass yield and charge yield of the experimental data for 500-MeV ..pi../sup -/. The calculation, however, overestimates the yield of neutron-rich isotopes from deep spallation. At the 1570-MeV ..pi../sup -/ energy the yield patterns, charge-dispersion, and mass-yield curves are nearly identical to those for 2-GeV proton spallation. These results suggest that pion-nucleon resonance effects probably decrease at higher energies and that limiting fragmentation and factorization concepts may be applied to understanding high-energy pion spallation.
- Research Organization:
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973
- OSTI ID:
- 6876585
- Journal Information:
- Phys. Rev., C; (United States), Vol. 18:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPPER
PION MINUS REACTIONS
ISOBAR MODEL
SPALLATION
CROSS SECTIONS
EVAPORATION MODEL
GEV RANGE 01-10
MEV RANGE 100-1000
NUCLEAR REACTION YIELD
RADIOCHEMISTRY
CHARGED-PARTICLE REACTIONS
CHEMISTRY
ELEMENTS
ENERGY RANGE
GEV RANGE
HADRON REACTIONS
MATHEMATICAL MODELS
MESON REACTIONS
METALS
MEV RANGE
NUCLEAR MODELS
NUCLEAR REACTIONS
PARTICLE MODELS
PION REACTIONS
TRANSITION ELEMENTS
YIELDS
651625* - Nuclear Properties & Reactions
A=59-89
Experimental- Nuclear Reactions & Scattering- (-1987)