Fragment emission in reactions of 18. 5-GeV /sup 12/C ions with complex nuclei

Conference · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5228169

Porile, N T; Cole, G D

The emission of fragments ranging from /sup 24/Na to /sup 52/Mn in reactions of 18.5 GeV /sup 12/C ions with Cu, Ag, Gd, Ta, Au, and U targets has been studied by means of activation techniques. The experiments involved determination of the fragment production cross sections and thick-target recoil properties. The latter were used to obtain mean fragment kinetic energies and values of ..beta../sub parallel to/, the forward velocity component of the struck nucleus (in units of c). The results are compared with similar data for incident protons of the same total kinetic energy. The data may be used to assess the importance of central collisions in fragment production. Such collisions lead to the near total destruction of both interacting nuclei and the resulting fragments are emitted by a system of intermediate rapidity. In such a process, the factorization hypothesis, which has been shown to be valid for target and projectile fragmentation reactions, should not be obeyed. A test for factorization is performed by means of a relation which states that the ratio of the cross sections for producing fragment /sup A/Z in /sup 12/C reactions to that for producing the same fragment in proton reactions with the same target is unity, provided both cross sections are reduced by the values of the corresponding total reaction cross sections sigma/sub R/, and evaluated for the same total kinetic energy of the projectile. The results of this comparison for the targets studied are presented and discussed. (WHK)

• Research Organization: Purdue Univ., Lafayette, IN (USA). Dept. of Chemistry
• DOE Contract Number: AS02-76ER01505
• OSTI ID: 5228169
• Report Number(s): DOE/ER/01505-99; CONF-820536-1; ON: DE82012322
• Country of Publication: United States
• Language: English

Related Subjects

651625 -- Nuclear Properties & Reactions
A=59-89
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651725 -- Nuclear Properties & Reactions
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651825* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651925 -- Nuclear Properties & Reactions
A=190-219
Experimental-- Nuclear Reactions & Scattering-- (-1987)
652025 -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
COPPER
CROSS SECTIONS
ELEMENTS
ENERGY
ENERGY RANGE
FACTORIZATION
FRAGMENTATION
GADOLINIUM
GEV RANGE
GEV RANGE 10-100
GOLD
HEAVY ION REACTIONS
KINETIC ENERGY
METALS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
RARE EARTHS
RECOILS
SILVER
TANTALUM
TRANSITION ELEMENTS
URANIUM