Short-Lived Radioisotope Tc98 Synthesized by the Supernova Neutrino Process
Short-Lived Radioisotope Tc98 Synthesized by the Supernova Neutrino Process
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超新星中微子过程合成的短寿命放射性同位素 Tc98
DOI：
10.1103/physrevlett.121.102701
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发表时间：
2018
影响因子：
8.6
通讯作者：
Mathews Grant J.
中科院分区：
文献类型：
--
作者：
Hayakawa Takehito;Ko Heamin;Cheoun Myung-Ki;Kusakabe Motohiko;Kajino Toshitaka;Usang Mark D.;Chiba Satoshi;Nakamura Ko;Tolstov Alexey;Nomoto Ken’ichi;Hashimoto Masa-aki;Ono Masaomi;Kawano Toshihiko;Mathews Grant J.
这些同位素的半衰期大约是年，可能存在于早期的太阳系中。在这封信中，我们报告了在核心坍缩超新星中中微子诱导反应产生的第一个计算结果。我们预测的太阳系形成时的丰度并不比目前测量的上限低多少，这提高了在不久的将来探测到它的可能性。我们表明，如果初始丰度被精确测量，thenuclear cosmochronometer可以用来评估一个更精确的值的持续时间从最后一个核心坍缩超新星的太阳系的形成。此外，该过程核合成的一个独特而新颖的特征是带电电流与电子反中微子反应的巨大贡献。这意味着它成为一个独特的新过程的电子反中微子的温度探针。
The isotopedecays towith a half-life ofand could have been present in the early Solar System. In this Letter, we report on the first calculations of the production ofby neutrino-induced reactions in core-collapse supernovae (theprocess). Our predictedabundance at the time of solar system formation is not much lower than the current measured upper limit raising the possibility for its detection in the not too distant future. We show that, if the initial abundance were to be precisely measured, thenuclear cosmochronometer could be used to evaluate a much more precise value of the duration time from the last core-collapse supernova to the formation of the solar system. Moreover, a unique and novel feature of the-process nucleosynthesis is the large contribution () from charged current reactions with electron antineutrinos. This means thatbecomes a unique new-process probe of the temperature of the electron antineutrinos.