Angular-anisotropy coefficients for fragment originating from the resonance-neutron-induced fission of 235U oriented nuclei
| Autor: | D. I. Tambovtsev |
|---|---|
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Physics of Atomic Nuclei. 71:706-712 |
| ISSN: | 1562-692X 1063-7788 |
| DOI: | 10.1134/s106377880804011x |
| Popis: | Statistical distributions of the coefficients measured for the angular distribution of fragments originating from the fission of 235U oriented nuclei that was induced by resonance neutrons obtained by using booster targets at the electron accelerator in Harwell and at a pulsed reactor in Dubna were approximated by a curve that was calculated under the assumption of a normal distribution of partial-wave fission amplitudes. A cutoff from below at a level of one-half of the average partial-wave width was introduced in this distribution. The calculation was performed with allowance for the K = 0, 1 and 2 channels for J = 3 and the K = 1 and 2 channels for J =4. The contributions of the K channels to the total probability were in the ratio 0.15 : 0.53 : 0.32 for J = 3 and in the ratio 0.625 : 0.375 for J = 4. A strong suppression of the K = 0 channel in the J = 3 spin subsystem in contrast to the situation observed in photofission can be interpreted as an indication of the possible partial conservation of K in resonance states formed from the entrance channel, which features only maximum values of K equal to J and J − 1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|