Investigation of the spontaneous fission properties of neutron-deficient nobelium isotopes

Number 1_Vol.3

AUTHORS: A.V. Isaev, A.I. Svirikhin, A.V. Andreev, A.V. Yeremin, I.N. Izosimov, A.N. Kuznetsov, A.A. Kuznetsova, O.N. Malyshev, A.G. Popeko, Yu.A. Popov, E.A. Sokol, M.L. Chelnokov, V.I. Chepigin, T.M. Schneidman, B. Gall, O. Dorvaux, P. Brione, A. Sellam, K. Hauschild, A. Lopez-Martenz, K. Rezynkina, S. Mullins, P. Mosat

DOI: 10.29317/ejpfm.2019030108

PAGES: 58 - 62

DATE: 2019-03-20


In the last years we carried out several experiments aimed to investigate properties of short-lived SF isotopes. The neutron-deficient isotopes of nobelium were produced in fusion-evaporation reactions using 206,208 Pb targets and an intense 48 Ca-beam. Fusion-evaporation residues were separated by the SHELS separator and implanted into a large-area double-sided (48 × 48) strip silicon detector surrounded by 3 He-based neutron counters. Half-lives and decay branching ratios for 252,254 No isotopes were measured. The average number of neutrons per spontaneous fission of 254 No determined for the first time.


neutron multiplicity, spontaneous fission, fission fragment.


[1] A.G. Popeko et al., Nucl. Instrum. Methods Phys. Res. B 376 (2016) 140.
[2] A.V. Isaev et al., Instrum. Exp. Tech. 54 (2011) 37.
[3] A.I. Svirikhin et al., Instrum. Exp. Tech. 54 (2011) 644.
[4] J. Magill et al., Nucleonica GmbH (2015).
[6] D.B. Pelowitz et al., Wilcox, MCNPX 2.7.0 Extensions, LA-UR-05- 2675, Los Alamos National Laboratory (2005).

Download file Open file