High-j single-particle neutron states outside the N=82 core

TY - JOUR

T1 - High-j single-particle neutron states outside the N=82 core

AU - Kay, B. P.

AU - Freeman, S. J.

AU - Schiffer, J. P.

AU - Clark, J. A.

AU - Deibel, C.

AU - Heinz, A.

AU - Parikh, A.

AU - Wrede, C.

PY - 2008/1/10

Y1 - 2008/1/10

N2 - The behaviour of the i(13/2) and h(9/2) single-neutron strength was studied with the (of, He-3) reaction on Ba-138, Ce-140, Nd-142 and Sm-144 targets at a beam energy of 51 MeV. The separation between the single-neutron states i(13/2) and h(9/2) was measured in N = 83 nuclei with changing proton number. To this end spectroscopic factors for states populated in high-e transfer were extracted from the data. Some mixing of e = 5 and 6 strength was observed with states that are formed by coupling the f(7/2) state to the 2(+) and 3(-) vibrational states and the mixing matrix elements were found to be remarkably constant. The centroids of the strength indicate a systematic change in the energies of the i(13/2) and h(9/2) single-neutron states with increasing proton number that is in quantitative agreement with the effects expected from the tensor interaction. (c) 2007 Elsevier B.V. All rights reserved.

AB - The behaviour of the i(13/2) and h(9/2) single-neutron strength was studied with the (of, He-3) reaction on Ba-138, Ce-140, Nd-142 and Sm-144 targets at a beam energy of 51 MeV. The separation between the single-neutron states i(13/2) and h(9/2) was measured in N = 83 nuclei with changing proton number. To this end spectroscopic factors for states populated in high-e transfer were extracted from the data. Some mixing of e = 5 and 6 strength was observed with states that are formed by coupling the f(7/2) state to the 2(+) and 3(-) vibrational states and the mixing matrix elements were found to be remarkably constant. The centroids of the strength indicate a systematic change in the energies of the i(13/2) and h(9/2) single-neutron states with increasing proton number that is in quantitative agreement with the effects expected from the tensor interaction. (c) 2007 Elsevier B.V. All rights reserved.

KW - = 83 NUCLEI

KW - HOLE STATES

KW - SYSTEMATICS

KW - LEVEL

UR - http://www.scopus.com/inward/record.url?scp=37349056677&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2007.11.033

DO - 10.1016/j.physletb.2007.11.033

M3 - Article

SN - 0370-2693

VL - 658

SP - 216

EP - 221

JO - Physics Letters B

JF - Physics Letters B

IS - 5

ER -