تقرير
Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich $^{122-131}$Sb$_{51}$ isotopes
| العنوان: | Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich $^{122-131}$Sb$_{51}$ isotopes |
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| المؤلفون: | Biswas, S., Lemasson, A., Rejmund, M., Navin, A., Kim, Y. H., Michelagnoli, C., Stefan, I., Banik, R., Bednarczyk, P., Bhattacharya, S., Bhattacharyya, S., Clément, E., Crawford, H. L., de France, G., Fallon, P., Frémont, G., Goupil, J., Jacquot, B., Li, H. J., Ljungvall, J., Maj, A., Ménager, L., Morel, V., Palit, R., Pérez-Vidal, R. M., Ropert, J., Barrientos, D., Benzoni, G., Birkenbach, B., Boston, A. J., Boston, H. C., Cederwall, B., Collado, J., Cullen, D. M., Désesquelles, P., Domingo-Pardo, C., Dudouet, J., Eberth, J., Gonzalez, V., Harkness-Brennan, L. J., Hess, H., Jungclaus, A., Korten, W., Labiche, M., Lefevre, A., Menegazzo, R., Mengoni, D., Million, B., Napoli, D. R., Pullia, A., Quintana, B., Ralet, D., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Stezowski, O., Theisen, Ch., Valiente-Dobon, J. J., Zielinska, M. |
| المصدر: | Physical Review C 99, 064302 (2018) |
| سنة النشر: | 2019 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | The neutron-rich $^{122-131}$Sb isotopes were produced as fission fragments in the reaction $^{9}$Be($^{238}$U,~f) with 6.2 MeV/u beam energy. An unique setup, consisting of AGATA, VAMOS++ and EXOGAM detectors, was used which enabled the prompt-delayed gamma-ray ($\gamma$) spectroscopy of fission fragments in the time range of 100 ns - 200 $\mu$s. New isomers, prompt and delayed transitions were established in the even-A $^{122-130}$Sb isotopes. In the odd-A $^{123-131}$Sb isotopes, new prompt and delayed $\gamma$-ray transitions were identified, in addition to the confirmation of the previously known isomers. The half-lives of the isomeric states and the $B(E2)$ transition probabilities of the observed transitions depopulating these isomers were extracted. The experimental data was compared with the theoretical results obtained in the framework of Large-Scale Shell-Model (LSSM) calculations in a restricted model space. Modifications of several components of the shell model interaction were introduced to obtain a consistent agreement with the excitation energies and the $B(E2)$ transition probabilities in neutron-rich Sn and Sb isotopes. The isomeric configurations in Sn and Sb were found to be relatively pure. Further, the calculations revealed that the presence of a single valence proton, mainly in the $g_{7/2}$ orbital in Sb isotopes, leads to significant mixing (due to the $\nu\pi$ interaction) of: (i) the neutron seniorities ($\upsilon_{\nu}$) and (ii) the neutron angular momentum ($I_{\nu}$). The above features have a weak impact on the excitation energies, but have an important impact on the $B(E2)$ transition probabilities. In addition, a constancy of the relative excitation energies irrespective of neutron seniority and neutron number in Sn and Sb was observed. Comment: 23 pages, 18 figures, 10 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.99.064302 |
| URL الوصول: | http://arxiv.org/abs/1906.01245 |
| رقم الأكسشن: | edsarx.1906.01245 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.99.064302 |
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