$^{22} $ mg（$α$，p）$^{25} $的第一个直接测量

论文标题

$^{22} $ mg（$α$，p）$^{25} $的第一个直接测量

First direct measurement of $^{22}$Mg($α$,p)$^{25}$Al and implications for X-ray burst model-observation comparisons

论文作者

Randhawa, J. S., Ayyad, Y., Mittig, W., Meisel, Z., Ahn, T., Aguilar, S., Alvarez-Pol, H., Bardayan, D. W., Bazin, D., Beceiro-Novo, S., Carpenter, L., Cortesi, M., Cortina-Gil, D., Blankstein, D., Gastis, P., Hall, M., Henderson, S., Kolata, J. J., Mijatovic, T., Ndayisabye, F., Malley, P. O, Pereira, J., Pierre, A., Robert, H., Santamaria, C., Schatz, H., Smith, J., Watwood, N., Zamora, J. C.

论文摘要

I型X射线爆发（XRB）光曲线对模型的核输入敏感，因此影响模型观察比较。 $^{22} $ mg（$α$，p）$^{25} $ al是直接影响XRB光曲线的最重要反应之一。我们使用主动目标时间投影室报告了$^{22} $ mg（$α$，p）$^{25} $ al的第一个直接测量。 XRB光曲线模型观察性观察比较源$ \ tt {gs 1826-24} $使用新的反应速率意味着比以前推断出的较少紧凑的中子星。此外，我们的结果消除了XRB模型计算中的重要不确定性，该计算以前阻碍了中子星的紧凑度的提取。

Type-I X-ray burst (XRB) light curves are sensitive to the model's nuclear input and consequently affects the model-observation comparisons. $^{22}$Mg($α$,p)$^{25}$Al is among the most important reactions which directly impact the XRB light curve. We report the first direct measurement of $^{22}$Mg($α$,p)$^{25}$Al using the Active Target Time Projection Chamber. XRB light curve model-observation comparison for the source $\tt{GS 1826-24}$ using new reaction rate implies a less-compact neutron star than previously inferred. Additionally, our result removes an important uncertainty in XRB model calculations that previously hindered extraction of the neutron star compactness.

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