تقرير
Understanding Excitations in $^{59,61}$Co, $^{59}$Ni
| العنوان: | Understanding Excitations in $^{59,61}$Co, $^{59}$Ni |
|---|---|
| المؤلفون: | Ajayi, Samuel, Tripathi, Vandana, Rubino, E., Bhattacharya, Soumik, Baby, L. T., Lubna, R. S., Benetti, C., Wibisono, Catur, Wheeler, MacMillan B., Tabor, S. L., Utsuno, Yutaka, Shimizu, Noritaka, Allmond, J. M. |
| سنة النشر: | 2023 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | High spin states in $^{59}$Co ($Z=27$), $^{59}$Ni ($Z=28$) and $^{61}$Co have been populated by the fusion evaporation reactions, $^{48}$Ti($^{14}$C, p2n)$^{59}$Co, $^{48}$Ti($^{14}$C, 3n)$^{59}$Ni, and $^{50}$Ti($^{14}$C, p2n)$^{61}$Co. The 9 MV tandem accelerator at the John D Fox Laboratory, Florida State University (FSU) was used to accelerate the $^{14}$C beam and the de-exciting $\gamma$ rays were detected by the FSU detector array consisting of six High Purity Germanium (HPGe) clover detectors, and three single crystals. Directional correlation of the $\gamma$ rays de-exciting oriented states (DCO ratios) and polarization asymmetry measurements helped to establish spin and parities of the excited states whenever possible. The level scheme of $^{59}$Co has been expanded with the inclusion of positive parity states up to 31/2$^+$ at around 11 MeV. The $^{59}$Ni positive parity states known from previous study were verified with modifications to some of the spins and parities. On the other hand, the negative parity states were extended to 31/2 at an excitation energy of 12 MeV. No new transition was observed for $^{61}$Co, but one of the major bands has been reassigned as consisting of positive parity states by reason of this study which is a candidate for magnetic rotation band. Cross shell excitations were observed in the three nuclei studied and the prominent role of excitation to g$_{9/2}$ orbital crossing the $N=40$ shell gap was established in relation to collective excitation in these nuclei by comparison with large-scale shell model calculations. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2306.14368 |
| رقم الأكسشن: | edsarx.2306.14368 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |