Speaker
Yuri Pyatkov
(JINR)
Description
Yu.V. Pyatkov1,2, D.V. Kamanin2, V.E. Zhuchko2, Z.I. Goryainova2, E.A. Kuznetsova2, Yu. M. Sereda2, A.N. Solodov2, O.V. Strekalovsky2, A.O. Zhukova2
1National Nuclear Research University “MEPHI”, 115409 Moscow, Russia
2 Joint Institute for Nuclear Research, 141980 Dubna, Russia
In our previous publications [1-4] we presented experimental evidences of rare ternary decay mode of low excited heavy nuclei called collinear cluster tri-partition (CCT). Essential feature of this process is that some fraction of the fission fragments (FFs) born during binary fission undergo a break-up, while they pass through a solid-state foil. Later we found that the FFs break-up is delayed relative to binary fission of mother system by up to 400ns. It is reasonable to think of such specific FFs as formed in the shape-isomer states [5]. The break-up is due to the FF inelastic scattering in the foil medium. One of our recent experiments at the double-armed time-of-flight COMETA-f spectrometer was dedicated to comparative study of the break-up of the FFs in the shape-isomer states while they pass through the degrader foils from Ta and Lexan. The influence of the nuclear charge of the degrader foil onto the break-up parameters is discussed.
References
1. Yu.V. Pyatkov et al., Eur. Phys. J. A 45, 29 (2010).
2. Yu.V. Pyatkov et al., Eur. Phys. J. A 48, 94 (2012).
3. Yu.V. Pyatkov et al., Phys. Rev. C 96 (2017) 064606.
4. Yu.V. Pyatkov et al., Eurasian Journal of Physics and Functional Materials
v.4 №1 (2020) 13-18
5. D.V.Kamanin, Yu.V.Pyatkov, A.N.Solodov et al., Journal of Physics: Conference Series 2586, 2023, art. 012043.
Primary author
Yuri Pyatkov
(JINR)