# Structure of unbound neutron-rich $^{9}$He studied using single-neutron transfer

Abstract : The 8He(d,p) reaction was studied in inverse kinematics at 15.4A MeV using the MUST2 Si-CsI array in order to shed light on the level structure of 9He. The well known 16O(d,p)17O reaction, performed here in reverse kinematics, was used as a test to validate the experimental methods. The 9He missing mass spectrum was deduced from the kinetic energies and emission angles of the recoiling protons. Several structures were observed above the neutron-emission threshold and the angular distributions were used to deduce the multipolarity of the transitions. This work confirms that the ground state of 9He is located very close to the neutron threshold of 8He and supports the occurrence of parity inversion in 9He.
Document type :
Journal articles

Cited literature [19 references]

http://hal.in2p3.fr/in2p3-00858297
Contributor : Sandrine Guesnon <>
Submitted on : Thursday, September 5, 2013 - 10:47:28 AM
Last modification on : Monday, December 14, 2020 - 4:06:20 PM
Long-term archiving on: : Friday, December 6, 2013 - 4:18:18 AM

### Files

he9-PRC.pdf
Files produced by the author(s)

### Citation

T. Al Kalanee, J. Gibelin, P. Roussel-Chomaz, N. Keeley, D. Beaumel, et al.. Structure of unbound neutron-rich $^{9}$He studied using single-neutron transfer. Physical Review C, American Physical Society, 2013, 88, pp.034301. ⟨10.1103/PhysRevC.88.034301⟩. ⟨in2p3-00858297⟩

Record views