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Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 59: Nuclear Structure and Dynamics II

HK 59.8: Talk

Wednesday, March 18, 2009, 18:30–18:45, H-ZO 50

Neutron knockout from Borromean halo: the target dependence — •Christoph Langer — Institut für Kernphysik, Universität Frankfurt, D-60438 Frankfurt am Main, Germany

The halo nuclei 11Li, 8He and 14Be were studied at GSI Darmstadt. In the FRS-LAND setup a mixed secondary beam consisting of nuclei with similar A/Z ratio was impinging on targets made of carbon, polyethylene and liquid hydrogen in order to study their contributions to different knockout reactions. A spectroscopic analysis of the borromean halo system 6He is presented. The one-neutron-breakup channel using a liquid hydrogen target was used to extract invariant mass spectra and a missing momentum distribution of the 5He subsystem for an incoming beam at around 240 MeV/A. These results are compared with literature and an earlier experiment performed with a carbon and polyethylene target only. Here, the proton related cross sections were obtained by subtracting the carbon background from the polyethylene data. Furthermore it was possible to reconstruct the total cross section of the one-neutron-knockout channel of 6He. This project is supported by the HGF Young Investigators Project VH-NG-327

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