| Autor: |
P.D. Georgopulos, J. G. Woodworth, R. G. Johnson, K. G. McNeill, J. W. Jury |
| Rok vydání: |
1979 |
| Předmět: |
|
| Zdroj: |
Nuclear Physics A. 327:53-63 |
| ISSN: |
0375-9474 |
| DOI: |
10.1016/0375-9474(79)90317-8 |
| Popis: |
The angular distribution of photoneutrons for the reaction 13 C(γ, n 0 ) 12 C was measured in the region of excitation energy between 7.6 and 24 MeV. The anisotropy coefficients over many of the sharp resonances seen have been interpreted using a simple single-particle description, and information on the spin and parity of these excited 13 C states has been found to be in agreement with the known level scheme. New levels at 7.95 MeV and at 12.05 MeV are seen and both are given the tentative J π assignment of 3 2 + . Comparison is made with results for the similar 12 C ( p , γ 0 ) 13 N reaction. The measured angular distribution coefficient, a 2 / a 0 , displays general agreement in magnitude with the predictions of a recent calculation but the gross energy-dependent features are in marked disagreement. The observed a 3 / a 0 coefficient between 14 and 18 MeV has the unexpectedly large average value of +0.38±0.05. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
