Superheavy hydrogen (5)H

Phys Rev Lett. 2001 Aug 27;87(9):092501. doi: 10.1103/PhysRevLett.87.092501. Epub 2001 Aug 13.

Abstract

Experimental search for (5)H using a secondary beam of (6)He has been performed. The transfer reaction (1)H((6)He,(2)He)(5)H was studied by detecting two protons emitted from the decay of (2)He. A peak consistent with a (5)H resonance at 1.7+/-0.3 MeV above the n+n+t threshold was observed, with a width of 1.9+/-0.4 MeV. The angular distribution of the (1)H((6)He,(2)He)(5)H reaction was measured as well as the energy correlation of the two protons.