Speaker
Prof.
Yuri Pyatkov
(JINR, MEPhI)
Description
In our previous pablications devoted to the collinear cluster tri-parttition of the low excited nuclei [1, 2] we have discussed the role of scattering medium in the registration of the CCT products. Briefly, even if initially two CCT partners fly in the same direction perfectly collinearly they get some angular divergence after passing the scattering medium on the flight pass due to the multiple scattering. Thanks to such effect they can be registered independently in the “stop” mosaic detector. Actually even thin backing of the radioactive source provides the observable effect. In order to increase it additional absorber (Ti foil) was introduced just after the source at the distance of approximately 1mm. We observe essential mass deficit in the total mass of the fission fragments detected in coincidence with Ti ions knocked out from the foil. It could be expected if the scattered fragment looks like a di-nuclear system destroying due to inelastic scattering on the Ti nucleus. A mean flight time between the Cf source and the foil does not exceed 0.1 ns. It can be regarded as a low limit for the life time of the di-nuclear system (shape-isomer). Possible link of the effect under study and gamma-isomers recently observed in [3] is discussed.
References
1. Yu. V. Pyatkov et al., Eur. Phys. J. A 45 (2010) 29.
2. Yu. V. Pyatkov et al., Eur. Phys. J. A 48 (2012) 94.
3. D. Kameda et al., Phys. Rev. C 86 (2012) 054319.
Primary author
Prof.
Yuri Pyatkov
(JINR, MEPhI)
Co-authors
Alexandr Alexandrov
(chief of the research group)
Alexandr Strekalovsky
(junior researcher)
Dmitri Kamanin
(chief of the International department of the JINR)
Elena Kuznetsova
(researcher)
Irina Alexandrova
(engineer)
Nikolai Kondratyev
(senior researcher)
Noel Mkaza
(senior lecture)
Oleg Strekalovsky
(senior researcher)
Vladimir Zhuchko
(senior researcher)
Vusi Malaza
(PhD student)
