Ground--state energies and widths of $^5$He and $^5$Li

Details Ground--state energies and widths of $^5$He and $^5$Li Ground--state energies and widths of $^5$He and $^5$Li

1996-05-20

arxiv.org/abs/nucl-th/9605028v1

Phys.Rev.C54:1485-1487,1996

Physics

Nuclear Physics

Nuclear Theory

3 pages, no figures, uses revtex.sty, accepted for publication in PRC, uuencoded postscript and tex-files available at ftp:/

Scientific paper

10.1103/PhysRevC.54.1485

We extract energies and widths of the ground states of $^5$He and $^5$Li from recent single--level R--matrix fits to the spectra of the $^3$H$({\rm d},\gamma$)$^5$He and the $^3$He$({\rm d},\gamma$)$^5$Li reactions. The widths obtained differ significantly from the formal R--matrix values but they are close to those measured as full widths at half maxima of the spectra in various experiments. The energies are somewhat lower than those given by usual estimates of the peak positions. The extracted values are close to the S--matrix poles calculated previously from the multi--term analyses of the N-$^4$He elastic scattering data.

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