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首页> 外文会议>International Symposium on Origin of Matter and Evolution of Galaxies >Experimental investigation of the ~(30)S(a, p) thermonuclear reaction in x-ray bursts
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Experimental investigation of the ~(30)S(a, p) thermonuclear reaction in x-ray bursts

机译：X射线爆发中〜（30）（A，P）热核反应的实验研究

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We performed the first measurement of ~(30)S+a resonant elastic scattering to experimentally examine the ~(30)S(a, p) stellar reaction rate in type I x-ray bursts. These bursts are the most frequent thermonuclear explosions in the galaxy, resulting from thermonuclear runaway on the surface of accreting neutron star binaries. The ~(30)S(a, p) reaction plays a critical role in burst models, yet very little is known about the compound nucleus ~(34)Ar at these energies nor the reaction rate itself. We performed a measurement of alpha elastic scattering with a radioactive beam of ~(30)S to experimentally probe the entrance channel. Utilizing a gaseous active target system and silicon detector array, we extracted the excitation function from 1.8 to 5.5 MeV near 160° in the center-of-mass frame. The experimental data were analyzed with an R-Matrix calculation, and we discovered several new resonances and extracted their quantum properties (resonance energy, width, spin, and parity). Finally, we calculated the narrow resonant thermonuclear reaction rate of ~(30)S(a, p) for these new resonances.
机译：我们进行了第一次测量〜（30）S +谐振弹性散射，以实验检查I型X射线爆发中的〜（30）S（A，P）恒星反应速率。这些爆发是星系中最常见的热核爆炸，由热核循环在凸性中子星二进制中的表面上产生。 〜（30）S（A，P）反应在突发模型中起着关键作用，但是在这些能量的化合物核〜（34）AR中也是非常少的，也不是反应速率本身。我们对α（30）秒的放射束进行了α弹性散射的测量，以实验探测入口通道。利用气态有源目标系统和硅检测器阵列，我们将激励功能从1.8至5.5 mev提取在大规模中心框架中接近160°。通过R-Matrix计算分析实验数据，我们发现了几种新的共振，并提取了它们的量子特性（共振能，宽度，旋转和奇偶校验）。最后，我们计算了这些新共振的〜（30）S（A，P）的窄共振热核反应速率。

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