Study of the production and decay properties of neutron-deficient nobelium isotopes

The new neutron-deficient isotope ^249 No was synthesized for the first time in the fusion-evaporation reaction ^204 Pb( ^48 Ca,3n) ^249 No. After separation, using the kinematic separator SHELS, the new isotope was identified with the GABRIELA detection system through genetic correlations with the known daughter and granddaughter nuclei ^245 Fm and ^241 Cf. The alpha-decay activity of ^249 No has an energy of 9129(22) keV and half-life 38.3(2.8) ms. An upper limit of 0.2