Fission time for the 235U + α reaction measured by the crystal blocking technique

✍ Scribed by O.A. Yuminov; A.M. Borisov; V.A. Drozdov; D.O. Eremenko; O.V. Fotina; F. Malaguti; P. Olivo; S.Yu. Platonov; V. Togo; A.F. Tulinov

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 290 KB
• Volume: 267
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2009.05.018

✦ Synopsis

E a = 25.9-31.2 MeV Crystal blocking technique Total time of induced fission process Double-humped fission barrier model Nuclear dissipation a b s t r a c t

The crystal blocking technique has been used to measure the total time of the induced fission process for the 235 U + a reaction in the energy range of bombarding a-particles from 25.9 to 31.2 MeV. Experimental fission times observed in this reaction vary from 10 À17 to 10 À16 s, depending on the projectile energy. Together with the corresponding experimental data on angular anisotropy in the same reaction they were analyzed within the dynamic-statistical approach with allowance for the nuclear dissipation phenomenon and the double-humped fission barrier model. It was demonstrated that the time of induced fission at low excitation energies is sensitive to the nuclear dissipation magnitude.