1. Evolution of the nuclear spin-orbit splitting explored via the 32Si(d,p)33Si reaction using SOLARIS.
- Author
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Chen, J., Kay, B.P., Hoffman, C.R., Tang, T.L., Tolstukhin, I.A., Bazin, D., Lubna, R.S., Ayyad, Y., Beceiro-Novo, S., Coombes, B.J., Freeman, S.J., Gaffney, L.P., Garg, R., Jayatissa, H., Kuchera, A.N., MacGregor, P., Mitchell, A.J., Mittig, W., Monteagudo, B., and Munoz-Ramos, A.
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NUCLEAR structure , *NEUTRONS , *MEAN field theory , *RADIOISOTOPES , *CYCLOTRONS , *KINEMATICS - Abstract
The spin-orbit splitting between neutron 1 p orbitals at 33Si has been deduced using the single-neutron-adding (d , p) reaction in inverse kinematics with a beam of 32Si, a long-lived radioisotope. Reaction products were analyzed by the newly implemented SOLARIS spectrometer at the reaccelerated-beam facility at the National Superconducting Cyclotron Laboratory. The measurements show reasonable agreement with shell-model calculations that incorporate modern cross-shell interactions, but they contradict the prediction of proton density depletion based on relativistic mean-field theory. The evolution of the neutron 1 p -shell orbitals is systematically studied using the present and existing data in the isotonic chains of N = 17 , 19, and 21. In each case, a smooth decrease in the separation of the 1 p 3 / 2 - 1 p 1 / 2 orbitals is seen as the respective p -orbitals approach zero binding, suggesting that the finite nuclear potential strongly influences the evolution of nuclear structure in this region. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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