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

Technical Report · Mon Nov 01 00:00:00 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 National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6523283
• Report Number(s): LBL-15325; ON: DE83005450
• Resource Relation: Other Information: Portions are illegible in microfiche products. Thesis
• Country of Publication: United States
• Language: English

Related Subjects

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