ELDAR (burning questions on the origins of Elements in the Lives and Deaths of stARs)

ELDAR（关于恒星生与死中元素起源的紧迫问题）

• 批准号: EP/X019381/1
• 负责人: Carlo Bruno
• 金额: $ 164.65万
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX019381%2F1
• 关键词: ELDAR; burning; questions; origins; Elements

How do stars synthesise new elements? How are elements disseminated in our Galaxy? Thermonuclear reactions involving charged particles play a central role in stellar evolution. Knowledge of their rates is needed to answer fundamental questions about the origin of the elements. I will develop new approaches for charged-particle detection at world-leading European laboratories, FAIR (Germany) and Gran Sasso (Italy), to address fundamental questions about the lives and deaths of stars. I will share techniques, scientific insights, and forge new links between leading European science communities using different methods to study stellar scenarios that are intimately linked in nature.Measurement of nuclear reactions involving radioactive isotopes are critical to model and understand the wealth of new astronomical data from stellar explosions. At FAIR, I will use a novel and world-unique approach, studying reactions induced by radioactive beams at the CRYRING heavy ion storage ring. I led the design and construction phase of a major in-ring charged-particle detection array and I am spokesperson for experiments investigating key uncertainties in scenarios ranging from the Big Bang to supernovae. ELDAR will fund the development of ground-breaking experimental approaches at rings, improving our knowledge of both quiescent and explosive phases of stellar evolution.At the low temperatures of quiescent stellar burning, nuclear reactions rates are too low to be detected above natural radioactive background on Earth. The LUNA accelerator, located underground at Gran Sasso, is the world-leading facility to study reactions that drive quiescent stellar evolution. ELDAR will allow me to construct a new array to study charged-particle reactions at LUNA, expanding the capabilities of this cutting-edge facility. I will investigate a long-standing puzzle on the cycle of life, death and rebirth of stars and the fate of matter ejected from supernovae in globular clusters.

恒星如何合成新元素？元素是如何在我们的银河系中传播的？涉及带电粒子的热核反应在恒星演化中起着核心作用。要回答有关元素起源的基本问题，就需要知道它们的速率。我将在世界领先的欧洲实验室FAIR（德国）和Gran Sasso（意大利）开发带电粒子探测的新方法，以解决有关恒星生死的基本问题。我将分享技术，科学见解，并在欧洲领先的科学团体之间建立新的联系，使用不同的方法来研究自然界中密切相关的恒星场景。测量涉及放射性同位素的核反应对于建模和理解来自恒星爆炸的新天文数据财富至关重要。在FAIR，我将使用一种新颖的、世界上独一无二的方法，研究放射性束在BERRING重离子储存环上引起的反应。我领导了一个主要的环内带电粒子探测阵列的设计和建造阶段，我是实验的发言人，研究从大爆炸到超新星的各种场景中的关键不确定性。ELDAR将资助在星环上开发突破性的实验方法，提高我们对恒星演化的静止和爆炸阶段的认识，在静止恒星燃烧的低温下，核反应速率太低，无法在地球天然放射性背景以上检测到。位于格兰萨索地下的LUNA加速器是世界领先的研究推动静止恒星演化的反应的设施。ELDAR将允许我构建一个新的阵列来研究LUNA的带电粒子反应，扩展这个尖端设施的能力。我将研究一个长期存在的谜题，关于恒星的生命、死亡和重生的周期，以及球状星团中超新星喷出的物质的命运。

项目成果

Nuclear Astrophysical Reaction Studies Using Heavy Ion Storage Rings

使用重离子存储环进行核天体物理反应研究

• DOI: 10.1080/10619127.2023.2230852
• 发表时间: 2023
• 期刊: Nuclear Physics News
• 作者: Bruno C

Low-energy nuclear reactions with stored ions: a new era of astrophysical experiments at heavy ion storage rings

存储离子的低能核反应：重离子存储环天体物理实验的新时代

• DOI: 10.1140/epja/s10050-023-00985-x
• 发表时间: 2023
• 期刊: The European Physical Journal A
• 作者: Glorius J