Theoretical study of anomalous projectile fragments produced in relativistic heavy ion interactions

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5612386

Fricke, S H

A theoretical study of anomalous projectile fragments produced in relativistic heavy ion experiments is done. A method, valid for any incident flux, for analyzing the data in detector experiments is developed. It is found that the results of this analysis agree with those of the large flux limit that is currently used to analyze most experimental data. The Glauber theory of high energy scattering is used to calculate mean free paths for various projectiles in emulsion detectors. It is found that the experimental power law fit is invalid in the region of charge 3 less than or equal to Z less than or equal to 5. A theoretical density for /sup 6/He is constructed by considering its isobaric analog in /sup 6/Li. The mean free path of /sup 6/He in emulsion is then calculated. The experimental variation of the mean free path of helium secondaries with distance is then explained by assuming the sample to consist of a mixture of /sup 4/He and /sup 6/He. The implications of recent measurements of the interaction cross sections for He and Li isotopes with C are discussed. The sudden impulse mechanism of exciting projectile fragments in relativistic heavy ion collisions is developed. The excitation energies received by /sup 32/S, /sup 137/Au, and /sup 238/U in interactions with the nuclei in emulsion detectors are then calculated. The differences in the observed properties of the induced fission in /sup 238/U and /sup 197/Au are naturally explained when the excitation energies are related to the number of nucleons knocked out.

• Research Organization: Minnesota Univ., Minneapolis (USA)
• OSTI ID: 5612386
• Country of Publication: United States
• Language: English

Related Subjects

651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651725 -- Nuclear Properties & Reactions
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANOMALONS
CARBON
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ELEMENTS
ENERGY RANGE
FISSION
GOLD 197 REACTIONS
HEAVY ION REACTIONS
HELIUM 6 REACTIONS
INFORMATION
LITHIUM 6 REACTIONS
MEAN FREE PATH
NONMETALS
NUCLEAR EMULSIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUMERICAL DATA
RELATIVISTIC RANGE
SPALLATION
SULFUR 32 REACTIONS
THEORETICAL DATA
TOTAL CROSS SECTIONS
URANIUM 238 REACTIONS