Anomalous reaction mean free paths of nuclear projectile fragments from heavy ion collisions at 2A GeV
Journal Article
·
· Phys. Rev. C; (United States)
We present in detail the description and the analysis of two independent experiments using beams of /sup 16/O and /sup 56/Fe. From their results it is concluded that the reaction mean free paths of relativistic projectile fragments, 3< or =Z< or =26, are shorter for a few centimeters after emission than at large distances, where they are compatible with values predicted from experiments on beam nuclei. The probability that this effect is due to a statistical fluctuation is <10/sup -3/. The effect is enhanced in later generations of fragments, the correlation between successive generations suggesting a kind of ''memory'' for the anomaly. Various systematic and spurious effects as well as conventional explanations are discussed, mainly on the basis of direct experimental observations internal to our data, and found not to explain our results. The data can be interpreted by the relatively rare occurrence of anomalous fragments that interact with an unexpectedly large cross section. The statistical methods used in the analysis of the observations are fully described.
- Research Organization:
- Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
- OSTI ID:
- 6081866
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 27:4; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Sun Aug 01 00:00:00 EDT 1982
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Journal Article
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OSTI ID:1022099
Related Subjects
651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651525 -- Nuclear Properties & Reactions
A=39-58
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
FRAGMENTATION
GEV RANGE
GEV RANGE 10-100
GEV RANGE 100-1000
HEAVY ION REACTIONS
IRON 56 REACTIONS
MEAN FREE PATH
NUCLEAR EMULSIONS
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
PROBABILITY
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651525 -- Nuclear Properties & Reactions
A=39-58
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
FRAGMENTATION
GEV RANGE
GEV RANGE 10-100
GEV RANGE 100-1000
HEAVY ION REACTIONS
IRON 56 REACTIONS
MEAN FREE PATH
NUCLEAR EMULSIONS
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
PROBABILITY