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arXiv · 0709.0468

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

B. P. Kay·S. J. Freeman·J. P. Schiffer·J. A. Clark·C. Deibel·A. Heinz·A. Parikh·C. Wrede
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Abstract

The behaviour of the i13/2 and h9/2 single-neutron strength was studied with the (4He,3He) reaction on 138Ba, 140Ce, 142Nd and 144Sm targets at a beam energy of 51 MeV. The separation between the single-neutron states i13/2 and h9/2 was measured in N =83 nuclei with changing proton number. To this end spectroscopic factors for states populated in high-l transfer were extracted from the data. Some mixing of l=5 and 6 strength was observed with states that are formed by coupling the f7/2 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 i13/2 and h9/2 single-neutron states with increasing proton number that is in quantitative agreement with the effects expected from the tensor interaction.

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B. P. Kay, S. J. Freeman, J. P. Schiffer, J. A. Clark, C. Deibel, A. Heinz, A. Parikh, C. Wrede. 2007-09-04. High-j single-particle neutron states outside the N=82 core. https://doi.org/10.1016/j.physletb.2007.11.033

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