caa a22 4500 46572924X CHVBK 20180323111737.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02039455 doi (NATIONALLICENCE)springer-10.1007/BF02039455 Kuroda P. Department of Chemistry, University of Nevada, 89154, Las Vegas, Nevada, (USA) aut The pre-Fermi natural reactor [Elektronische Daten] [P. Kuroda] The origin of the concept of a large-scale nuclear chain reaction occurring in nature can be traced back to the ideas expressed byAston in 1922 and byJoliot in 1935. Geochemical investigations on hot springs, which have been carried out at the University of Tokyo since the 1930s, played a key role in the early development of the theory of natural reactor. Results obtained from the studies, which have been carried out in various countries since the 1972 discovery of the Oklo phenomenon, reveal the fact that the natural reactors at Oklo may have indeed operated in a manner quite similar to the geysers or intermittent hot springs. A careful examination of the isotopic compositions of the so-called anomalous xenon from the Oklo reactor suggests that the natural reactors were operating at temperatures between the boiling point of iodine (183°C) and the melting point of tellurium (452°C), periodically being turned on and off. Akadémiai Kiadó, 1990 Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 142/1(1990-09-01), 101-112 0236-5731 142:1<101 1990 142 10967 https://doi.org/10.1007/BF02039455 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02039455 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kuroda P. Department of Chemistry, University of Nevada, 89154, Las Vegas, Nevada, (USA) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 142/1(1990-09-01), 101-112 0236-5731 142:1<101 1990 142 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer