Structure of 14B and the evolution of N=9 single-neutron isotones

S. Bedoor, Western Michigan University
A. H. Wuosmaa, Western Michigan University
J. C. Lighthall, Western Michigan University
M. Alcorta, Argonne National Laboratory
B. B. Back, Argonne National Laboratory
P. F. Bertone, Argonne National Laboratory
B. A. Brown, Michigan State University
C. M. Deibel, Louisiana State University
C. R. Hoffman, Argonne National Laboratory
S. T. Marley, Western Michigan University
R. C. Pardo, Argonne National Laboratory
K. E. Rehm, Argonne National Laboratory
A. M. Rogers, Argonne National Laboratory
J. P. Schiffer, Argonne National Laboratory
D. V. Shetty, Western Michigan University


We have used the 13B(d,p)14B reaction in inverse kinematics to study the properties of states in 14B, the lightest particle-bound N=9 isotone. The spectroscopic information, including spins, parities, and spectroscopic factors for the states observed in 14B are used to deduce the wave functions for the low-lying negative parity ν(sd) levels, as well as provide information about the evolution of the effective neutron 1s1/2-0d5/2 single-particle energies. The data confirm that the ground and first-excited states are predominantly s wave in character and are single-neutron halo states. The effective single-particle energies are found to match the trends set by other N=9 isotones. © 2013 American Physical Society.