Margareta Hellström
Forskare
Evidence for a new low-lying resonance state in 7He
Författare
Summary, in English
Low-lying resonance states in 7He(6He+n), formed after fragmentation reactions of a 227 MeV/nucleon 8He beam on a carbon target, have been studied. Coincidences between 6He nuclei and neutrons, corresponding to the one-neutron knockout channel in 8He, were selected. The relative energy spectrum in the 6He+n system shows a structure, which is interpreted as the 7He ( Ipi = 3/2(-)) ground state, unbound with 0.43(2) MeV relative to the 6He+n system and a width of Gamma = 0.15(8) MeV overlapping with an excited ( Ipi = 1/2(-)) state observed at 1.0(1) MeV with a width of Gamma = 0.75(8) MeV.
Publiceringsår
2002
Språk
Engelska
Publikation/Tidskrift/Serie
Physical Review Letters
Volym
88
Issue
10
Dokumenttyp
Artikel i tidskrift
Förlag
American Physical Society
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1079-7114