@article{337ed4d4926f42dc918705129b237666,
title = "Short-Lived Radioisotope Tc 98 Synthesized by the Supernova Neutrino Process",
abstract = "The isotope Tc98 decays to Ru98 with a half-life of 4.2×106 yr and could have been present in the early Solar System. In this Letter, we report on the first calculations of the production of Tc98 by neutrino-induced reactions in core-collapse supernovae (the ν process). Our predicted Tc98 abundance 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, the Tc98 nuclear 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 Tc98 ν-process nucleosynthesis is the large contribution (∼20%) from charged current reactions with electron antineutrinos. This means that Tc98 becomes a unique new ν-process probe of the temperature of the electron antineutrinos.",
author = "Takehito Hayakawa and Heamin Ko and Cheoun, {Myung Ki} and Motohiko Kusakabe and Toshitaka Kajino and Usang, {Mark D.} and Satoshi Chiba and Ko Nakamura and Alexey Tolstov and Ken'Ichi Nomoto and Hashimoto, {Masa Aki} and Masaomi Ono and Toshihiko Kawano and Mathews, {Grant J.}",
note = "Funding Information: This work was supported by JSPS KAKENHI Grants No. JP15K05083, No. JP15H03665, No. JP17K05459, and No. JP18H03715. The work of A. T. and K. N. was supported by the World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan, and JSPS KAKENHI Grants No. JP16K17658, No. JP26400222, No. JP16H02168, and No. JP17K05382. Work at the University of Notre Dame was supported by the U.S. Department of Energy under Nuclear Theory Grant No. DE-FG02-95-ER40934. The work of M.-K. C. was supported by the National Research Foundation of Korea (Grants No. NRF-2015K2A9A1A06046598 and No. NRF-2017R1E1A1A01074023). Funding Information: This work was supported by JSPS KAKENHI Grants No.JP15K05083, No.JP15H03665, No.JP17K05459, and No.JP18H03715. The work of A.T. and K.N. was supported by the World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan, and JSPS KAKENHI Grants No.JP16K17658, No.JP26400222, No.JP16H02168, and No.JP17K05382. Work at the University of Notre Dame was supported by the U.S. Department of Energy under Nuclear Theory Grant No.DE-FG02-95-ER40934. The work of M.-K.C. was supported by the National Research Foundation of Korea (Grants No.NRF-2015K2A9A1A06046598 and No.NRF-2017R1E1A1A01074023). Publisher Copyright: {\textcopyright} 2018 American Physical Society.",
year = "2018",
month = sep,
day = "4",
doi = "10.1103/PhysRevLett.121.102701",
language = "English",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "10",
}