تقرير
$^{57}$Zn $\beta$-delayed proton emission establishes the $^{56}$Ni $rp$-process waiting point bypass
| العنوان: | $^{57}$Zn $\beta$-delayed proton emission establishes the $^{56}$Ni $rp$-process waiting point bypass |
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| المؤلفون: | Saxena, M., Ong, W. -J, Meisel, Z., Hoff, D. E. M., Smirnova, N., Bender, P. C., Burcher, S. P., Carpenter, M. P., Carroll, J. J., Chester, A., Chiara, C. J., Conaway, R., Copp, P. A., Crider, B. P., Derkin, J., Estrade, A., Hamad, G., Harke, J. T., Jain, R., Jayatissa, H., Liddick, S. N., Longfellow, B., Mogannam, M., Montes, F., Nepal, N., Ogunbeku, T. H., Richard, A. L., Schatz, H., Soltesz, D., Subedi, S. K., Sultana, I., Tamashiro, A. S., Tripathi, V., Xiaog, Y., Zink, R. |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | We measured the $^{57}$Zn $\beta$-delayed proton ($\beta$p) and $\gamma$ emission at the National Superconducting Cyclotron Laboratory. We find a $^{57}$Zn half-life of 43.6 $\pm$ 0.2 ms, $\beta$p branching ratio of (84.7 $\pm$ 1.4)%, and identify four transitions corresponding to the exotic $\beta$-$\gamma$-$p$ decay mode, the second such identification in the $f p$-shell. The $p/\gamma$ ratio was used to correct for isospin mixing while determining the $^{57}$Zn mass via the isobaric multiplet mass equation. Previously, it was uncertain as to whether the rp-process flow could bypass the textbook waiting point $^{56}$Ni for astrophysical conditions relevant to Type-I X-ray bursts. Our results definitively establish the existence of the $^{56}$Ni bypass, with 14-17% of the $rp$-process flow taking this route. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physletb.2022.137059 |
| الوصول الحر: | http://arxiv.org/abs/2204.01621Test |
| رقم الانضمام: | edsarx.2204.01621 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physletb.2022.137059 |
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