Observation of excited states in 5H

Phys Rev Lett. 2004 Dec 31;93(26 Pt 1):262501. doi: 10.1103/PhysRevLett.93.262501. Epub 2004 Dec 20.

Abstract

The 5H system was produced in the 3H(t,p)5H reaction studied with a 58 MeV tritium beam at small c.m. angles. High statistics data were used to reconstruct the energy and angular correlations between the 5H decay fragments. A broad structure in the 5H missing mass spectrum showing up above 2.5 MeV was identified as a mixture of the 3/2+ and 5/2+ states. The data also present evidence that the 1/2+ ground state of 5H is located at about 2 MeV.