Single-Proton Removal Reaction Study of $^{16}$B

J.L. Lecouey (1) , N.A. Orr (1) , F.M. Marqués (1) , N.L. Achouri (1) , J.C. Angélique (1) , B.A. Brown (2) , F. Carstoiu (1, 3) , W.N. Catford (4) , N.M. Clarke (5) , M. Freer (5) , B.R. Fulton (6) , S. Grévy (1) , F. Hanappe (7) , K.L. Jones (4) , M. Labiche (1) , R.C. Lemmon (4) , A. Ninane (8) , E. Sauvan (1) , K.M. Spohr (9) , L. Stuttge (10)

1 LPCC - Laboratoire de physique corpusculaire de Caen
2 National Superconducting Cyclotron Laboratory
3 NIPNE - Horia Hulubei National Institute of Physics and Nuclear Engineering
4 Department of Physics
5 Institute for Neuromuscular Research
6 Department of Physics
7 PNTPM
8 Slashdey Integrated Systems Solutions
9 School of Engineering and Science
10 IPHC - Institut Pluridisciplinaire Hubert Curien

The low-lying level structure of the unbound system $^{16}$B has been investigated via single-proton removal from a 35 MeV/nucleon $^{17}$C beam. The coincident detection of the beam velocity $^{15}$B fragment and neutron allowed the relative energy of the in-flight decay of $^{16}$B to be reconstructed. The resulting spectrum exhibited a narrow peak some 85 keV above threshold. It is argued that this feature corresponds to a very narrow (GAMMA ≪100 keV) resonance, or an unresolved multiplet, with a dominant PI(p3/2)$^{−1=$ ⊗ V(d$^{3}$$_{5/2}$)J=3/2+ PI(p3/2)$^{−1}$ ⊗ V (d$^{2}$$_{5/2, s1/2}$)J=3/2+ configuration which decays by d-wave neutron emission.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

J.L. Lecouey, N.A. Orr, F.M. Marqués, N.L. Achouri, J.C. Angélique, et al.. Single-Proton Removal Reaction Study of $^{16}$B. Physics Letters B, 2009, 672, pp.6-11. ⟨10.1016/j.physletb.2008.12.053⟩. ⟨in2p3-00259696⟩