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Inclusive neutron spectra at 0/sup 0/ from Nb-Nb and Au-Au collisions at 800 MeV/nucleon

Journal Article · · Phys. Rev. C; (United States)
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Inclusive neutron spectra were measured at 0/sup 0/ from Nb-Nb and Au-Au collisions at 800 MeV/nucleon. The spectra in the rest frame of the projectile were decomposed into three Gaussians with standard deviations of 55 +- 4, 114 +- 12, and 259 +- 22 MeV/c for Nb-Nb collisions, and 56 +- 4, 110 +- 10, and 279 +- 15 MeV/c for Au-Au collisions. Physical processes associated with each Gaussian are discussed. The dependence of the parameters of the three Gaussians on the impact parameter indicates that the temperature of the spectators excited by peripheral collisions is lower than that excited by nonperipheral collisions, that projectile neutrons involved in nonperipheral collisions have a broader momentum distribution than those involved in peripheral collisions, and that an observed high-energy tail has its origin primarily in nonperipheral collisions. The high-energy tail is explained well by collective backscattering of neutrons in the target from nucleon clusters in the projectile with a mean cluster size of about 1.3 in both Nb and Au.
Research Organization:
Kent State University, Kent, Ohio 44242
OSTI ID:
7144892
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 38:1; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651720* -- Nuclear Properties & Reactions
A=90-149
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651920 -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
BACKSCATTERING
BEVALAC
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DISTRIBUTION
ELASTIC SCATTERING
ENERGY RANGE
FRAGMENTATION
GEV RANGE
GEV RANGE 10-100
GEV RANGE 100-1000
GOLD 197 REACTIONS
GOLD 197 TARGET
HEAVY ION REACTIONS
IMPACT PARAMETER
INCLUSIVE INTERACTIONS
INTERACTIONS
INVARIANCE PRINCIPLES
LORENTZ INVARIANCE
MONTE CARLO METHOD
NEUTRON SPECTRA
NIOBIUM 93 REACTIONS
NIOBIUM 93 TARGET
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
SCATTERING
SPECTRA
TARGETS
TIME-OF-FLIGHT METHOD