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Evidence for a new low-lying resonance state in 7He

Meister, M ; Markenroth Bloch, Karin LU orcid ; Aleksandrov, D ; Aumann, T ; Axelsson, L ; Baumann, T ; Borge, M J G ; Chulkov, L V ; Dostal, W and Eberlein, B , et al. (2002) In Physical Review Letters 88(10).
Abstract
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.
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publishing date
type
Contribution to journal
publication status
published
in
Physical Review Letters
volume
88
issue
10
article number
102501
publisher
American Physical Society
external identifiers
  • pmid:11909350
  • scopus:0037061218
ISSN
1079-7114
DOI
10.1103/PhysRevLett.88.102501
language
English
LU publication?
no
id
db69ae1e-b08e-493a-86ad-c341a7d91e06 (old id 1125279)
date added to LUP
2016-04-01 12:20:08
date last changed
2022-04-06 11:30:22
@article{db69ae1e-b08e-493a-86ad-c341a7d91e06,
  abstract     = {{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.}},
  author       = {{Meister, M and Markenroth Bloch, Karin and Aleksandrov, D and Aumann, T and Axelsson, L and Baumann, T and Borge, M J G and Chulkov, L V and Dostal, W and Eberlein, B and Elze, Th W and Emling, H and Forssen, C and Geissel, H and Hellström, Margareta and Holzmann, R and Jonson, B and Kratz, J V and Kulessa, R and Leifels, Y and Leistenschneider, A and Mukha, I and Münzenberg, G and Nickel, F and Nilsson, T and Nyman, G and Richter, A and Riisager, K and Scheidenberger, C and Schrieder, G and Simon, H and Tengblad, O and Zhukov, M V}},
  issn         = {{1079-7114}},
  language     = {{eng}},
  number       = {{10}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Evidence for a new low-lying resonance state in 7He}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.88.102501}},
  doi          = {{10.1103/PhysRevLett.88.102501}},
  volume       = {{88}},
  year         = {{2002}},
}