Giant dipole resonance built on hot rotating nuclei produced during evaporation of light particles from theMo88compound nucleus
| Autor: | F. Gramegna, R. Nicolini, W. Meczynski, B. Szpak, Massimo Chiari, B. Fornal, M. Krzysiek, M. Ciemala, M. Zieblinski, Giovanni Casini, B. Wasilewska, Luca Morelli, M. Matejska-Minda, M. Cinausero, S. Brambilla, D. Montanari, M. Degerlier, A. Chbihi, Alessandra Corsi, Giorgio Baiocco, A. Nannini, S. Carboni, J. Dudek, J. Styczen, L. Bardelli, A. Giaz, Oliver J. Roberts, A. Maj, I. Mazumdar, Gabriele Pasquali, J.P. Wieleczko, N. Blasi, P. Bednarczyk, M. Kmiecik, S. Myalski, A. Bracco, F. C. L. Crespi, Sandro Barlini, N. Dinh Dang, O. Wieland, M. Bruno, F. Camera, G. Benzoni, M. D'Agostino, S. Leoni, Silvia Piantelli, Ch. Schmitt, V. L. Kravchuk, Maurizio Bini, Simone Valdré, T. Marchi, G. Prete, B. Million, K. Mazurek |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Physics
Nuclear and High Energy Physics education.field_of_study Photon 010308 nuclear & particles physics Phonon Drop (liquid) Nuclear Theory Population 01 natural sciences Spectral line Dipole 0103 physical sciences Thermal Atomic physics Nuclear Experiment 010306 general physics education Excitation |
| Zdroj: | Physical Review C. 91 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.91.054313 |
| Popis: | High-energy giant dipole resonance (GDR) γ rays were measured following the decay of the hot, rotating compound nucleus of 88Mo, produced at excitation energies of 124 and 261 MeV. The reaction 48Ti+ 40Ca at 300 and 600 MeV bombarding energies has been used. The data were analyzed using the statistical modelMonte Carlo code GEMINI++. It allowed extracting the giant dipole resonance parameters by fitting the high-energy γ -ray spectra. The extracted GDR widths were compared with the available data at lower excitation energy and with theoretical predictions based on (i) The Lublin-Strasbourg drop macroscopic model, supplemented with thermal shape fluctuations analysis, and (ii) The phonon damping model. The theoretical predictions were convolutedwith the population matrices of evaporated nuclei from the statistical model GEMINI++. Also a comparison with the results of a phenomenological expression based on the existing systematics, mainly for lower temperature data, is presented and discussed. A possible onset of a saturation of the GDR width was observed around T = 3 MeV. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|