Spectroscopy of $^{9}$He, quasi-free scattering $^{6}$He+$^{4}$He
- Wolski, R.
- S. Golovkov, M.
- V. Grigorenko, L.
- S. Fomichev, A.
- V. Gorshkow, A.
- Krupko, S.A.
- M. Rodin, A.
- I. Sidorchuk, S.
- S. Slepnev, R.
- V. Stepantsov, S.
- M. Ter-Akopian, G.
- A. Korsheninnikov, A.
- Yu. Nikolskii, E.
- A. Kuzmin, E.
- G. Novatskii, B.
- N. Stepanov, D.
- Fortier, S.
- Roussel-Chomaz, P.
- Mittig, W.
DOIAbstract
International audienceLow lying states of the unbound $^{9}$He system were investigated by means of the (d,p) reaction. A cryogenic deuterium target was bombarded by a secondary $^{8}$He beam. Complete kinematics measurements were accomplished. The observed $^{9}$He states are broad and overlapping. Their spins and parities have been unambiguously determined. Data from a $^{6}$He($\alpha$,2$\alpha$)2n experiment have been analyzed in terms of a quasi-free scattering approach. A large effect of the 2n final state interaction on the internal $^{6}$He momentum distribution has been demonstrated
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