Deep-Sea and Lunar Radioisotopes from Nearby Astrophysical Explosions
Deep-Sea and Lunar Radioisotopes from Nearby Astrophysical Explosions
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DOI：
10.1146/annurev-nucl-011823-045541
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发表时间：
2023-09
影响因子：
12.4
通讯作者：
Brian D. Fields;Anton Wallner
中科院分区：
文献类型：
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作者：
Brian D. Fields;Anton Wallner
地球和月球上的活性（未衰变）放射性同位素是最近附近天体物理爆炸的信使。对深海样品、南极雪和月壤中的60 Fe的测量揭示了大约300万年前和700万年前的两个脉冲。在深海地壳中检测到244钚表明最近的r过程事件。我们回顾了超灵敏加速器质谱技术，使这些发现。然后，我们探索对天体物理学的影响，包括超新星核合成，特别是r过程，以及超新星尘埃的产生和包裹太阳系的局部气泡的形成。其影响超出了核物理和天体物理学，包括太阳物理学，天体生物学，地质学和进化生物学的研究。
Live (not decayed) radioisotopes on the Earth and Moon are messengers from recent nearby astrophysical explosions. Measurements of 60Fe in deep-sea samples, Antarctic snow, and lunar regolith reveal two pulses about 3 Myr and 7 Myr ago. Detection of 244Pu in a deep-sea crust indicates a recent r-process event. We review the ultrasensitive accelerator mass spectrometry techniques that enable these findings. We then explore the implications for astrophysics, including supernova nucleosynthesis, particularly the r-process, as well as supernova dust production and the formation of the Local Bubble that envelops the Solar System. The implications go beyond nuclear physics and astrophysics to include studies of heliophysics, astrobiology, geology, and evolutionary biology.