First measurement of 25 Al+p resonant scattering relevant to the astrophysical reaction 22 Mg( α ,p) 25 Al

• Published in: EPJ Web of conferences 2022, Vol.260, p.5001
• Main Authors: Hu, J., Yamaguchi, H., Lam, Y.H., Heger, A., Kahl, D., Jacobs, A.M., Johnston, Z., Xu, S.W., Zhang, N.T., Ma, S.B., Ru, L.H., Liu, E.Q., Liu, T., Hayakawa, S., Yang, L., Shimizu, H., Hamill, C.B., Murphy, A. StJ, Su, J., Fang, X., Chae, K.Y., Kwag, M.S., Cha, S.M., Duy, N.N., Uyen, N.K., Kim, D.H., Pizzone, R.G., La Cognata, M., Cherubini, S., Romano, S., Tumino, A., Liang, J., Psaltis, A., Sferrazza, M., Kim, D., Li, Y.Y., Kubono, S.
• Format: Article
• Language: English
• ISSN: 2100-014X; 2100-014X
• DOI: 10.1051/epjconf/202226005001

Type I X-ray bursts (XRBs) are the most frequently observed thermonuclear explosions in nature. The 22 Mg( α ,p) 25 Al reaction plays a critical role in XRB models. However, experimental information is insufficient to deduce a precise 22 Mg( α ,p) 25 Al reaction rate for the respective XRB temperature range. A new measurement of 25 Al+p resonant scattring was performed up to the astrophysically interested energy region of 22 Mg( α ,p) 25 Al. Several resonances were observed in the excitation functions, and their level properties have been determined based on an R-matrix analysis. In particular, proton widths and spin-parities of four natural-parity resonances above the α threshold of 26 Si, which can contribute the reaction rate of 22 Mg( α ,p) 25 Al, were first experimentally determined.