The crystal blocking technique has been used to measure the total time of the induced fission process for the 235U + α reaction in the energy rage of bombarding α-particles from 25.9 to 31.2 MeV. The experimental fission lifetimes observed in this reaction vary from 10-17 to 10-16 s, depending on the projectile energy. The experimental data (along with the corresponding data on the angular anisotropy and fissionability of Pu isotopes produced in the investigated reaction) have been analyzed within the dynamic-statistical approach with allowance for the nuclear dissipation phenomenon and the double-humped fission barrier model. It is demonstrated that the time of induced fission reaction at low excitation energies is sensitive to the nuclear viscosity.
Dynamical analysis of the induced fission time obtained by the crystal blocking technique for the 235U + α reaction / Dermenev A.A.; Drozdov V.A.; Eremenko D.O.; Malaguti F.; Olivo P.; Platonov S.Yu.; Togo V.; Uguzzoni A.; Fotina O.V; Yuminov O.A.. - In: BULLETIN OF THE RUSSIAN ACADEMY OF SCIENCES. PHYSICS. - ISSN 1062-8738. - STAMPA. - 73 (6):(2009), pp. 835-839. [10.3103/S106287380906029X]
Dynamical analysis of the induced fission time obtained by the crystal blocking technique for the 235U + α reaction
MALAGUTI, FRANCO;OLIVO, PAOLA;UGUZZONI, ARNALDO;
2009
Abstract
The crystal blocking technique has been used to measure the total time of the induced fission process for the 235U + α reaction in the energy rage of bombarding α-particles from 25.9 to 31.2 MeV. The experimental fission lifetimes observed in this reaction vary from 10-17 to 10-16 s, depending on the projectile energy. The experimental data (along with the corresponding data on the angular anisotropy and fissionability of Pu isotopes produced in the investigated reaction) have been analyzed within the dynamic-statistical approach with allowance for the nuclear dissipation phenomenon and the double-humped fission barrier model. It is demonstrated that the time of induced fission reaction at low excitation energies is sensitive to the nuclear viscosity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
