| Autor: |
F. Bečvář, W. Parker, Todd Bredeweg, Bayarbadrakh Baramsai, D. J. Vieira, A. Chyzh, J. L. Ullmann, A. L. Keksis, G. E. Mitchell, R. C. Haight, Dugersuren Dashdorj, Aaron Couture, Marian Jandel, John M. O'Donnell, U. Agvaanluvsan, M. Krtička, Robert S. Rundberg, S. Valenta, Ching-Yen Wu, C. L. Walker, Jeri Kroll |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 69, p 00018 (2014) |
| Popis: |
The experimental spectra of γ rays following radiative neutron capture on iso- lated resonances of stable 152,154−158 Gd targets were measured by the DANCE calorime- ter installed at the Los Alamos Neutron Scattering Center in New Mexico, USA. These spectra were analyzed within the extreme statistical model to get new information on the photon strength functions. Special emphasis was put on study of the scissors vibrational mode present in these isotopes. Our data show that the scissors-mode resonances are built not only on the ground states but also on the excited levels of all studied Gd iso- topes. The scissors mode strength observed in 157,159 Gd products is significantly higher than in neighboring even-even nuclei 156,158 Gd. Such a difference indicates the existence of an odd-even effect in the scissors mode strength. Moreover, there exists no universal parameter-free model of the electric dipole photon strength function describing the ex- perimental data in all of the Gd isotopes studied. The results for the scissors mode are compared with the (γ, γ � ) data for the ground-state transitions and with the results from 3 He-induced reactions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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