Ternary fission of 252Cf: 3368 keV γ radiation from 10Be fragments

[[abstract]]Ternary fission of 252Cf was studied at Gammasphere with eight ΔE×E particle telescopes. After Doppler correction, the 3368 keV 2+→0+ transition in 10Be was found in coincidence with the 10Be fragments with no evidence for any γ rays not Doppler shifted for 10Be with >21 MeV kinetic energy. The ratio of the first 2+ to ground-state population probabilities was estimated as N(2+)∕N(0+)=0.160±0.025. The angular distribution for 3368 keV γ rays indicated the spin alignment of excited 10Be nuclei preferentially is parallel or antiparallel to their momentum.[[fileno]]2010125010046[[department]]物理