U.S.-Romania-Poland Planning for Cooperative Research in Nuclear Astrophysics at the Exteme Light Infrastructure-Nuclear Physics(ELI-NP)Facility in Bucharest, Romania

通过一系列催化活动，康涅狄格大学和杜克大学的美国科学家打算与波兰和罗马尼亚的国际合作者在核天体物理学研究方面建立长期合作伙伴关系。美国首席研究员Moshe Gai和杜克大学的Henry Weller将与华沙大学的Wojciech Dominik和Ovidiu Tesilean合作，在布加勒斯特附近建造极光基础设施-核物理（ELI-NP）。他们将共同为核天体物理学的新基础研究和罗马尼亚马古列尔-布加勒斯特ELI-NP伽玛射线束设备的使用奠定基础。此次合作旨在利用欧盟在实验性ELI基础设施方面的重大投资，同时吸引美国在电子时间投影室（eTPC）探测器和气体回收系统设计方面的专业知识。对于更广泛的影响，最终有助于高端气体回收和净化系统的突破可能会产生未来工业应用的想法。由于一名美国博士后学生将参与早期的模拟和探测器设计，其他好处包括早期参与这种前沿的美欧团队合作。如果成功，初步结果将有助于为探测器技术提供新的概念，能够高度精确地确定一个重要的天体物理量，即恒星氦燃烧中的碳氧比。这次合作提供了一个独特的机会，将新的激光设备的使用与在华沙开发的用于测量x射线发射的新型u-v-w电子读出器的新探测器的规划联系起来。在完成建设和额外的研究支持后，结果应该允许科学家确定比美国高强度伽马射线源（HIgS）设施所研究的更低的动量中心能量的光核横截面。获得的新数据有望减少在HIgS获得的天体物理s因子的模糊性，从而导致确定更精确的碳氧比。研究人员希望他们的新方法可以应用于其他重要的天体物理反应。

Through a set of catalytic activities U.S. scientists at the University of Connecticut and Duke University intend to forge a long-term partnership for studies in nuclear astrophysics with international collaborators in Poland and Romania. The U.S. principal investigator, Moshe Gai, and Henry Weller of Duke University will cooperate with counterparts Wojciech Dominik, at the University of Warsaw, and Ovidiu Tesilean, at the Extreme Light Infrastructure-Nuclear Physics (ELI-NP) being constructed near Bucharest. Together, they will prepare the groundwork for new basic research in nuclear astrophysics and use of the gamma-ray beam facility of the ELI-NP in Magurele-Bucharest, Romania. This cooperation aims to leverage significant European Union investments in experimental ELI infrastructure while engaging U.S. expertise in the design of an electronic Time Projection Chamber (eTPC) detector and gas recycling system. For broader impact, breakthroughs that eventually contribute to a high-end gas recycling and purification system could yield ideas for future industrial applications. Because one U.S. postdoctoral student will participate in the early simulations and detector design, other benefits include early career engagement in this forefront U.S.-European teamwork. If successful, preliminary results should contribute to new concepts for detector technology capable of providing a highly precise determination of an important astrophysical quantity, the carbon-to-oxygen ratio in stellar helium burning. This collaboration presents a unique opportunity to link use of a new laser facility and planning for a new detector with a new novel u-v-w electronic Readout, developed in Warsaw for measuring x-ray emissions. After completed construction and with additional research support, results should allow scientists to determine photo nuclear cross sections for center-of-momentum energies lower than those investigated at the High Intensity gamma-ray Source (HIgS) facility in the U.S. The new data obtained can be expected to reduce the ambiguities in the astrophysical S-factors obtained at HIgS and therefore lead to determining a more precise carbon-to-oxygen ratio. The researchers hope that their new method may be applied to other important astrophysical reactions.