The present paper is devoted to the description of quasi-neutron structure of odd isotones in chain with N = 149 : 243Pu, 245Cm , 247Cf, 249Fm , 251No, and 253Rf. The minimization of potential surface with respect to collective parameters was carried out in order to define ground states and describe low lying quasi-neutron states in the frame of two center shell model. The blocking effect was taken into account as well, transition probabilities and corresponding lifetimes for low lying quasi-neutron states were estimated.
21.10.Pc Single-particle levels and strength functions
13.40.-f Electromagnetic processes and properties
21.10.Tg Lifetimes, widths
$^1$Department of Nuclear Physics, Faculty of Physics, M.V.Lomonosov Moscow State University.\
$^2$Joint Institute for Nuclear Research, Bogolyubov Theoretical Physics Laboratory\
$^3$D.V. Skobeltsyn Institute of Nuclear Physics, M.V.Lomonosov Moscow State University.\
$^4$Joint Institute for Nuclear Research
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