Quenching of Single-Particle Strength in A=15 Nuclei.
/ Authors
B. Kay, T. Tang, I. Tolstukhin, G. B. Roderick, A. Mitchell, Y. Ayyad, S. Bennett, J. Chen, K. Chipps, H. Crawford
and 10 more authors
S. Freeman, K. Garrett, M. Gott, M. Hall, C. Hoffman, H. Jayatissa, A. Macchiavelli, P. MacGregor, D. Sharp, G. Wilson
/ Abstract
Absolute cross sections for the addition of s- and d-wave neutrons to ^{14}C and ^{14}N have been determined simultaneously via the (d,p) reaction at 10 MeV/u. The difference between the neutron and proton separation energies, ΔS, is around -20 MeV for the ^{14}C+n system and +8 MeV for ^{14}N+n. The population of the 1s_{1/2} and 0d_{5/2} orbitals for both systems is reduced by a factor of approximately 0.5 compared with the independent single-particle model, or about 0.6 when compared with the shell model. This finding strongly contrasts with results deduced from intermediate-energy knockout reactions between similar nuclei on targets of ^{9}Be and ^{12}C. The simultaneous technique used removes many systematic uncertainties.
Journal: Physical review letters