Abstract
The nuclear system H5 was studied using the H3(t,p)H5 transfer reaction at a laboratory energy of 57.7 MeV and small center of mass angles. The energy and angular correlations among the H5 decay fragments were obtained by complete kinematical reconstruction. A broad structure in the H5 missing mass spectrum above 2.5 MeV with a typical width of several MeV was identified as a mixture of 3/2+ and 5/2+ states. Analysis of interference patterns observed in the measured angular correlations disclosed the 1/2+ ground state of H5 concealed in the smooth missing mass spectrum. The deduced values for the resonance energy and width are Eg.s.≈1.8 MeV and Γg.s.≈1.3 MeV. The estimated cross sections for population of the ground state and the doublet of excited states at θc.m.=5°−10° are 150±50 μb/sr and 4.6±2 mb/sr, respectively.13 MoreReceived 29 August 2005DOI:https://doi.org/10.1103/PhysRevC.72.064612©2005 American Physical Society
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