THE ZR-90(N, P)Y-90 REACTION AT E(N) = 98 MEV
| Autor: | CONDE, H, OLSSON, N, RAMSTROM, E, RONNQVIST, T, ZORRO, R, BLOMGREN, J, HAKANSSON, A, TIBELL, G, JONSSON, O, NILSSON, L, RENBERG, PU, OSTERLUND, M, UNKELBACH, W, WAMBACH, J, VANDERWERF, SY, ULLMANN, J, WENDER, SA |
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| Přispěvatelé: | KVI - Center for Advanced Radiation Technology |
| Jazyk: | angličtina |
| Rok vydání: | 1992 |
| Předmět: |
Y-90 DEDUCED GAMOW-TELLER
PREEQUILIBRIUM NEUTRON EMISSION MEASURED-SIGMA(EP THETA) E = 98 MEV COMPARISON WITH RPA-DWIA CALCULATIONS ZR-90(N P) P N REACTIONS MULTIPOLE DECOMPOSITION CROSS-SECTIONS OTHER MULTIPOLE STRENGTHS GAMOW-TELLER STRENGTH NUCLEON-NUCLEON INTERACTION STATISTICAL MULTISTEP DIRECT ISOVECTOR GIANT-RESONANCES CHARGE-EXCHANGE BETA-DECAY Nuclear Experiment DWBA CALCULATIONS INTERMEDIATE ENERGIES STATISTICAL-THEORY |
| Zdroj: | Nuclear Physics A, 545(4), 785-821. ELSEVIER SCIENCE BV |
| ISSN: | 0375-9474 |
| Popis: | Double-differential cross sections of the Zr-90(n, p) reaction have been measured at 98 MeV in the angular range 0-degrees-30-degrees for excitation energies up to 40 MeV. The spectra have been interpreted in terms of direct and multistep reactions. The contributions from the latter have been calculated using a statistical theory of multistep direct reactions. The direct parts of the spectra have been decomposed into their different multipole components by using peak-fitting and multipole-decomposition techniques, based on sample angular distributions calculated within the distorted-wave Born approximation. An extensive microscopic calculation based on the random-phase approximation has also been performed and the results are compared with the experimental data. A value S(beta)+ = 1.7 +/- 0.2 is extracted for the Gamow-Teller strength, suggesting an occupancy nu-2 = 0.09 +/- 0.01 for the 1g9/2 proton orbital. This value has been compared with recent results from (d, He-3) proton pickup and (e, e'p) knockout reactions. |
| Databáze: | OpenAIRE |
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