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建立核天体物理学研究的长期伙伴关系。美国首席研究员摩西·盖和杜克大学的亨利·韦勒将与华沙大学的沃伊切赫·多米尼克和奥维迪乌·特西里恩合作，在布加勒斯特附近建造极轻基础设施-核物理(ELI-NP)。他们将共同为在核天体物理学方面进行新的基础研究和使用罗马尼亚布加勒斯特马格里勒的ELI-NP伽马射线束设施奠定基础。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，同时利用美国的专业知识设计电子时间投影室(ETPC)探测器和气体回收系统。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为未来的工业应用带来想法。由于一名美国博士后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一前沿的美欧团队合作。如果成功，初步结果将有助于探测器技术的新概念，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。这一合作提供了一个独特的机会，将新激光设备的使用和新探测器的规划与在华沙开发的用于测量x射线发射的新型u-v-w电子读出器联系起来。建造完成后，在额外的研究支持下，结果将使科学家能够确定动量中心能量低于美国高强度伽马射线源设施所研究的动量中心能量的照片核截面。所获得的新数据有望减少在高强度伽马射线源设施获得的天体物理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.