Toward an experimentally determined Al 26 m ( p , γ ) Si 27 reaction rate in ONe novae
Toward an experimentally determined Al 26 m ( p , γ ) Si 27 reaction rate in ONe novae
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实验确定 ONe 新星中 Al 26 m ( p , γ ) Si 27 反应速率
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
C. Wrede
中科院分区：
文献类型：
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作者：
C. Deibel;J. Clark;R. Lewis;A. Parikh;P. Parker;C. Wrede
通过测量陨石包裹体中{26}MAthm{Al}$的衰变和CGRO和INTERNAL等卫星探测到的1.809 MeV的Mathm{Gamma}射线，发现了银河系{26}Mathm{Al}$的核合成的有力证据。有几个地点被建议用来生产超新星，其中包括一颗新星。在一个新星中摧毁$^{26}mathm{Al}$是可能的，通过反应$^{26}mathm{Al}{}^{g}(p，AssureMathm{Gamma})^{27}mathm{Si}$和$^{26}mathm{Al}{}^{m}(p，Ensureath{Gamma})^{27}mathm{Si}$。在本工作中，通过对{27}MATHM{Al}(^{3}MATHM{He}，t)^{27}mathrm{Si}{}^{*}(p)^{26}mathrm{Al}{}^{m}$和${28}MATHM{Si}(^{3}MATHM{He}，Ensuremath{alpha})^{27}mathrm{Si}{}^{*}(p)^{26}mathrm{Al}{}^{m}$反应。在质子阈值7.691 MeV以上的1 MeV范围内，发现了几个新的$^{26}主模{Al}{}^{m}+p$共振。报道了这些态和已知态的激发能和质子分支比。
Strong evidence of the nucleosynthesis of Galactic $^{26}mathrm{Al}$ has been found through measurements involving excesses in $^{26}mathrm{Mg}$ from the decay of $^{26}mathrm{Al}$ in meteoritic inclusions and the 1.809-MeV $ensuremath{gamma}$-ray line detected by satellites such as CGRO and INTEGRAL. Several sites for the production of $^{26}mathrm{Al}$ have been suggested, including ONe novae. Destruction of $^{26}mathrm{Al}$ in ONe novae is possible via the reactions $^{26}mathrm{Al}{}^{g}(p,ensuremath{gamma})^{27}mathrm{Si}$ and $^{26}mathrm{Al}{}^{m}(p,ensuremath{gamma})^{27}mathrm{Si}$. In the present work, resonance parameters for the $^{26}mathrm{Al}{}^{m}(p,ensuremath{gamma})^{27}mathrm{Si}$ reaction have been determined via studies of the $^{27}mathrm{Al}(^{3}mathrm{He},t)^{27}mathrm{Si}{}^{*}(p)^{26}mathrm{Al}{}^{m}$ and $^{28}mathrm{Si}(^{3}mathrm{He},ensuremath{alpha})^{27}mathrm{Si}{}^{*}(p)^{26}mathrm{Al}{}^{m}$ reactions. Several new $^{26}mathrm{Al}{}^{m}+p$ resonances have been discovered within 1 MeV above the proton threshold of 7.691 MeV. Excitation energies and proton-branching ratios for those and previously known states are reported.