The decay properties of 264 Hs and 265 Hs produced in the 207,208 Pb( 58 Fe, x n ) ( x =1,2) reactions were studied using a gas-filled recoil ion separator at the linear accelerator facility of RIKEN. A total of six decay chains were assigned to 264 Hs. The cross sections of 264 Hs produced in the 208 Pb( 58 Fe,2 n ) and 207 Pb( 58 Fe, n ) reactions were measured to be 2.8 +6.5 -2.3 and 6.9 +4.4 -3.1 pb, respectively. The isotope 264 Hs decayed by α-particle emission (five events) and spontaneous fission (one event). The α-particle energy of 264 Hs was observed at 10.61 ±0.04 and 10.80 ±0.08 MeV.
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Sato et al. (2011) studied this question.
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