RATIO OF ASYMMETRIC TO SYMMETRIC FISSION OF Pu$sup 239$ AND Pu$sup 241$ AS A FUNCTION OF NEUTRON ENERGY
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
Further radiochemical experiments were carried out to test the theoretical suggestion that in low-energy neutroninduced fission, the asymmetric to symmetric fission ratio should depend on the spin of the fissioning nucleus. In the present work two kinds of experiments were done. In the first, with both Pu/sup 239/ and Pu/sup 241/, comparisons were made of the asymmetric/symmetric yield ratios for thermal fission with the corresponding ratios for gross resonance fission with epi-Sm neutrons. In the second kind, monoenergetic neutrons were employed to study variations of Pu/sup 239/ fission yields with neutron energy over the 0.297 ev resonance. If the assumption is made that spin difference is the principal cause of change in the asymmetric/symmetric ratio in this energy region, the results indicate that this ratio differs by a factor of at least 5.3 between the two spin states of Pu/sup 239/. This is the largest effect of this kind observed to date. (auth)
- Research Organization:
- Phillips Petroleum Co., Atomic Energy Div., Idaho Falls, Idaho
- NSA Number:
- NSA-14-024899
- OSTI ID:
- 4150508
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 119; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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