تقرير
Observation of Positive-Parity Bands in $^{109}$Pd and $^{111}$Pd: Enhanced $\gamma$-Softness
| العنوان: | Observation of Positive-Parity Bands in $^{109}$Pd and $^{111}$Pd: Enhanced $\gamma$-Softness |
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| المؤلفون: | Stefanova, E. A., Lalkovski, S., Korichi, A., Kutsarova, T., Lopez-Martens, A., Xu, F. R., Liu, H. L., Kisyov, S., Minkova, A., Bazzacco, D., Bergström, M., Görgen, A., Hannachi, F., Herskind, B., Hübel, H., Jansen, A., Khoo, T. L., Podolyák, Zs., Schönwasser, G. |
| سنة النشر: | 2012 |
| المجموعة: | Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment |
| الوصف: | The neutron-rich nuclei $^{109}$Pd and $^{111}$Pd were produced as fission fragments following the $^{30}$Si + $^{168}$Er reaction at 142 MeV. Using the identification based on the coincidences with the complementary fission fragments, the only positive-parity bands observed so far in $^{109}$Pd and $^{111}$Pd emerged from this work. A band, built on top of the 5/2$^+$ ground state exhibiting $\Delta I$ = 1 energy-level staggering, was observed in each of these nuclei. Both nuclei of interest, $^{109}$Pd and $^{111}$Pd, are suggested to lie in the transitional region of Pd isotopes of maximum $\gamma$-softness. The ground states of both nuclei are predicted by TRS calculations to be extremely $\gamma$-soft with shallow triaxial minima. The first crossing in the new bands is proposed to be due to an alignment of $h^2_{11/2}$ neutrons. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.86.044302 |
| URL الوصول: | http://arxiv.org/abs/1206.1173 |
| رقم الأكسشن: | edsarx.1206.1173 |
| قاعدة البيانات: | arXiv |
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