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USNDP

12He (2017KE05)


(Not illustrated)

The nucleus 12He has not been observed. See (2015JO05) and (1985PO10, 2005GR38).

1. 14Be(CH2, 12He → 8He + 4n) Qm = -38.5229

It was suggested by (2014SH23) that data collected in 14Be interactions on a CH2 target (2012KO43) could be influenced by 2p removal reactions that would populate states in 12He. A reanalysis of the data (2015JO05), which determined the full kinematics of ejected neutrons and charged He ions, showed no evidence for population of 12He.