Intermediate- and high-energy reactions of uranium with neon and carbon

Technical Report · Mon Nov 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/6523283· OSTI ID:6523283

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 intra-nuclear cascade and nuclear firestreak models are both able to predict the general shapes of the experimental distributions, with the exception of the yields for the lightest fragments.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6523283
• Report Number(s): LBL-15325; ON: DE83005450
• Country of Publication: United States
• Language: English

Related Subjects

652025* -- Nuclear Properties &amp; Reactions
A=220 &amp; above
Experimental-- Nuclear Reactions &amp; Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
CARBON 12 REACTIONS
CHARGE DISTRIBUTION
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DATA ANALYSIS
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EXPERIMENTAL DATA
FRAGMENTATION
GAMMA SPECTROSCOPY
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HEAVY ION REACTIONS
HYPOTHESIS
INFORMATION
LIMITING FRAGMENTATION
MASS SPECTRA
MATHEMATICAL MODELS
METALS
NEON 20 REACTIONS
NUCLEAR FIREBALL MODEL
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICAL DATA
RECOILS
RELATIVISTIC RANGE
SPECTRA
SPECTROSCOPY
URANIUM