Experimental study of the two-body spin-orbit force
| Autor: | Burgunder, G., Sorlin, O., Nowacki, F., Giron, S., Hammache, F., Moukaddam, M., eville, N. De S er, Beaumel, D., aceres, L. C, ément, E. Cl, Duchêne, G., Ebran, J. P., Fernandez-Dominguez, B., Flavigny, F., Franchoo, S., Gibelin, J., Gillibert, A., évy, S. Gr, Guillot, J., Lapoux, V., Lepailleur, A., Matea, I., Matta, A., Nalpas, L., Obertelli, A., Otsuka, T., Pancin, J., Poves, A., Raabe, R., Scarpaci, J. A., Stefan, I., Stodel, C., Suzuki, T., Thomas, J. C. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.112.042502 |
| Popis: | Energies and spectroscopic factors of the first $7/2^-$, $3/2^-$, $1/2^-$ and $5/2^-$ states in the $^{35}$Si$_{21}$ nucleus were determined by means of the (d,p) transfer reaction in inverse kinematics at GANIL using the MUST2 and EXOGAM detectors. By comparing the spectroscopic information on the $^{35}$Si and $^{37}$S isotones, a reduction of the $p_{3/2} - p_{1/2}$ spin-orbit splitting by about 25% is proposed, while the $f_{7/2} -f_{5/2}$ spin-orbit splitting seems to remain constant. These features, derived after having unfolded nuclear correlations using shell model calculations, have been attributed to the properties of the 2-body spin-orbit interaction, the amplitude of which is derived for the first time in an atomic nucleus. The present results, remarkably well reproduced by using several realistic nucleon-nucleon forces, provide a unique touchstone for the modeling of the spin-orbit interaction in atomic nuclei. Comment: 5 pages, 3 figures, accepted for publication in Physical Review Letters |
| Databáze: | arXiv |
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