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Non-peripheral collisions of heavy ions in nuclear emulsion. [0. 2 to 2. 1 GeV/A]

Conference ·
OSTI ID:7218400
; ; ; ;
The emulsion technique is being used to examine the angular and momentum distribution of fragments emitted from nonperipheral collisions between emulsion nuclei (AgBr) and heavy-ion projectiles /sup 4/He, /sup 16/O, and /sup 40/Ar in the range of energies 0.2 to 2.1 GeV/A. Selection criteria, scanning and measuring, measurements, and analytic procedure are addressed. Prong number distributions, range and angular distributions are shown. The following conclusions were drawn: there is no unique particle-emitting system; prong distributions dN/dtheta are broad and Maxwellian-like, with maxima that shift toward smaller angles as the fragment energy increases, and as the beam energy decreases; no statistically significant structure attributed to well-defined collective phenomena is observed; there is no evidence that the angular distribution for low-energy fragments depends on the impact parameters of the collision between heavy ions at 2.1 GeV/A; at 2.1 GeV/A the number of fragments per event emitted in the backward hemisphere is insensitive to projectile mass. 6 figures, 3 tables. (RWR)
Research Organization:
California Univ., Berkeley (USA). Lawrence Berkeley Lab.
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
7218400
Report Number(s):
LBL-6562; CONF-770602-5
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
ARGON 40 REACTIONS
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ENERGY RANGE
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HEAVY ION REACTIONS
KINETICS
MULTIPLICITY
NUCLEAR EMULSIONS
NUCLEAR REACTION KINETICS
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
REACTION KINETICS
SPALLATION