Intermediate and high energy reactions of uranium with neon and carbon

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5932635

McGaughey, P L

Target fragment production from the interactions of 1.0, 3.0, 4.8, and 12 GeV /sup 12/C and 5.0, 8.0, 20, and 42 GeV /sup 20/Ne with uranium has been measured using off-line gamma-ray spectroscopic techniques. The experimental charge and mass yield distributions are generally consistent with the concepts of limiting fragmentation and factorization at energies of 3.0 GeV and above. The total projectile kinetic energy was found to be the relevant scaling parameter for the comparison of reactions induced by projectiles of different sizes. Light fragments with mass number less than 60 were found to violate limiting fragmentation, and had excitation functions that were strongly increasing with projectile energy until 8.0 to 12.0 GeV. With the 1.0 GeV /sup 12/C beam the pattern of mass yields was quite different from that of all the other reactions, with the normal peak in the fission mass region (80 < A < 145), but with much lower yields below mass number 60 and between mass numbers 145 and 210, indicating that these fragments are formed primarily in very energetic reactions in which large excitation energies are transferred to and significant amounts of mass are removed from the target nucleus. Theoretical predictions of the intra-nuclear cascade, nuclear fireball, and nuclear firestreak models are compared with the experimental results. The fireball model is found to be inferior to the other two due to its failure to deposit large enough excitation energies within the fragment precursors.

• Research Organization: California Univ., Berkeley (USA)
• OSTI ID: 5932635
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Strong Interactions &amp; Baryon &amp; Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACTINIDES
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
DATA
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EXPERIMENTAL DATA
FIREBALL MODEL
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HEAVY ION REACTIONS
HYPOTHESIS
INFORMATION
LIMITING FRAGMENTATION
MASS NUMBER
MATHEMATICAL MODELS
METALS
NEON 20 REACTIONS
NUCLEAR CASCADES
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE MODELS
SPALLATION
URANIUM