Investigation of astrophysically relevant reactions for the p process within the Gamow window

我们宇宙中能量的起源以及对恒星生与死过程中元素合成的理解是物理学中最具挑战性的问题之一。这些问题由一个结合了核物理和天体物理的研究领域来解决，通常被称为核天体物理学。在所谓的p过程中，对重富质子同位素的核合成的描述是基于涉及数千个光衰变反应的天体物理反应网络。试图重现这一过程的网络计算受到理论模型预测中涉及的核物理输入的相当大的不确定性的强烈阻碍。拟议的项目涉及p过程的天体物理学相关反应的实验研究。因此，计划在接近和高于A = 100的质量区域研究质子和β粒子引起的富质子同位素反应及其天体物理意义。实验将在科隆大学的串联离子加速器中进行。补充调查将在达姆施塔特工业大学的实验设施进行。

The origin of energy in our universe and the understanding of synthesis of elements during life and death of stars are amongst the most challenging questions in physics. These questions are addressed by a research field which combines nuclear physics and astrophysics and is commonly denoted as Nuclear Astrophysics. The description of the nucleosynthesis of heavy proton-rich isotopes within the so-called p process is based on astrophysical reaction networks involving thousands of photodisintegration reactions. Network calculations trying to reproduce this process are strongly hampered by rather large uncertainties stemming from the nuclear-physics input involved in the theoretical model predictions. The proposed project deals with the experimental investigation of astrophysical relevant reactions for the p process. Therefore, it is planned to study proton- and (- particle-induced reactions on proton-rich isotopes with astrophysical implications in the mass region close to and above A = 100. The experiments will be performed at the tandem ion accelerator at the University of Cologne. Complementary investigations will be carried out at the experimental facility at TU Darmstadt.