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USNDP

10He (1974AJ01)


(Not illustrated)

10He has not been observed when 232Th has been bombarded with 145 MeV 15N ions (1971AR21), nor in the spontaneous fission of 252Cf (1967CO1K). See also (1966PO09). It is particle unstable: the calculated (M - A) = 52.75 MeV. The breakup energies into 9He + n and 8He + 2n are calculated to be -1.1 and -4.9 MeV, respectively (1972TH13). See also (1966GA25, 1972GA1F). See also (1968CE1A, 1973KO1D) and (1969BA55, 1970RY04, 1971LO13, 1971RY1A; theor.).