8He-6He: a comparative study of electromagnetic fragmentation reactions

Summary, in English

Dissociation of a 227 MeV/u 8He beam in a lead target has been studied in a kinematically complete experiment. The results are compared with similar data from the well-known halo nucleus 6He. Coulomb–nuclear interference in the inelastic channel gives evidence for a Iπ=1− resonance in 8He at Ex=4.15 MeV. The deduced B(E1) value of 0.38±0.07 e2 fm2 indicates a uniform distribution of the four neutrons around the greek small letter alpha-particle core.

• Author: M. Meister; Karin Markenroth Bloch; D. Aleksandrov; T. Aumann; T. Baumann; M.J.G. Borge; L.V. Chulkov; D. Cortina-Gil; B Eberlein; T.W. Elze; H Emling; H Geissel; Margareta Hellström; B Jonson; J V Kratz; R Kulessa; A Leistenschneider; I Mukha; G Münzenberg; F Nickel; T Nilsson; G Nyman; M Pfützner; V Pribora; A Richter; K Riisager; C Scheidenberger; G Schrieder; H Simon; O Tengblad; M V Zhukov
• Publishing year: 2002
• Language: English
• Pages: 3-16
• Publication/Series: Nuclear Physics A
• Volume: 700
• Issue: 1-2
• Links: http://dx.doi.org/10.1016/S0375-9474(01)01305-7
• Document type: Journal article
• Publisher: Elsevier
• Status: Published