Study of the $^{22}$Mg waiting point relevant for x-ray burst nucleosynthesis via the $^{22}$Mg($\alpha$,$p$)$^{25}$Al reaction
| Autor: | Jayatissa, H., Avila, M. L., Rehm, K. E., Mohr, P., Meisel, Z., Chen, J., Hoffman, C. R., Liang, J., Müller-Gatermann, C., Neto, D., Ong, W. J., Psaltis, A., Santiago-Gonzalez, D., Tang, T. L., Ugalde, C., Wilson, G. |
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| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.131.112701 |
| Popis: | The $^{22}$Mg($\alpha$,$p$)$^{25}$Al reaction rate has been identified as a major source of uncertainty for understanding the nucleosynthesis flow in Type-I x-ray bursts (XRBs). We report a direct measurement of the energy- and angle-integrated cross sections of this reaction in a 3.3-6.9 MeV center-of-mass energy range using the MUlti-Sampling Ionization Chamber (MUSIC). The new $^{22}$Mg($\alpha$,$p$)$^{25}$Al reaction rate is a factor of $\sim$4 higher than the previous direct measurement of this reaction within temperatures relevant for XRBs, resulting in the $^{22}$Mg waiting point of x-ray burst nucleosynthesis flow to be significantly bypassed via the ($\alpha,p$) reaction Comment: 6 pages, 3 figures, 1 table |
| Databáze: | arXiv |
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