Effect of angular momentum on charged particle-induced fission at moderate excitation energies
A study has been made of the effect of varying the amount of angular momenium possessed by the projectile particle on the fission probability of some elements lighter than polonium. The same compound nucleus with approximately the same excitation energy ( plus or minus 0.5 MeV) was produced by nuclear reactions using different charged particles, thus deposlting varying amounts of angular momenium in the compouad nucleus. All analyses were done using standard radiochemical techniques. The helium ioninduced fission of /sup 195/Pt at an excitation energy of 32.7 MeV resulted in a total fission cross section of 2.2 mu barn, while the deuterium ion-induced fission of /sup 197/Au at the same excitation energy had a total fission cross section of 4.6 mu barn for the same compound nucleus, /sup 199/Hg*. The helium ion-induced fission of /sup 207/Pb at excitatlon energies of 33.5 and 25.6 MeV occurred with total fission cross sections of 3080 mu barns and 27.2 mu barns respectively. The deuterium ion- induced fission of /sup 209/Bi giving the same /sup 211/Po* compound nucleus at approximately the same average excitation energies had total fission cross sections of 330 and 4.0 mu barn respectively. In the first case, the fission reaction induced by the lighter projectile nucleus occurred with a larger total fission cross section, while in the second case, the fission reaction induced by the heavier projectile nucleus possessed the larger total fission cross section. These results indicate that the angular momentum of the impinging nucleus contributes to but is not the only factor which influences the total fission cross section at moderate excitation energies. (auth)
- Research Organization:
- Western Washington State Coll., Bellingham
- NSA Number:
- NSA-29-001711
- OSTI ID:
- 4415265
- Journal Information:
- J. Inorg. Nucl. Chem., v. 35, no. 11, pp. 3651-3658, Journal Name: J. Inorg. Nucl. Chem., v. 35, no. 11, pp. 3651-3658; ISSN JINCA
- Country of Publication:
- United Kingdom
- Language:
- English
Similar Records
RELATIVE CROSS SECTIONS FOR FORMATION OF THE SHIELDED ISOMERIC PAIR Cs$sup 134$m AND Cs$sup 134$ IN MEDIUM ENERGY FISSION
ANGULAR DISTRIBUTIONS FROM HEAVY-ION-INDUCED FISSION (thesis)
Related Subjects
*BISMUTH 209-- DEUTERON REACTIONS
*DEUTERON REACTIONS-- FISSION
*GOLD 197-- DEUTERON REACTIONS
*LEAD 207-- ALPHA REACTIONS
*PLATINUM 195-- ALPHA REACTIONS
ANGULAR MOMENTUM
COMPOUND NUCLEI
CROSS SECTIONS
ENERGY RANGE
EXCITATION
HELIUM IONS
ION BEAMS
MERCURY 199
N68961* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
190 <= A <= 219 Nuclear Reactions & Scattering--Spontaneous & Induced Fission
POLONIUM 211
PROBABILITY