caa a22 4500 467897174 CHVBK 20180406152807.0 cr unu---uuuuu 170328e20061201xx s 000 0 eng 10.1007/s11038-006-9123-5 doi (NATIONALLICENCE)springer-10.1007/s11038-006-9123-5 Maricic Jelena University of Hawaii at Manoa, 96822, Honolulu, HI, USA aut Experimental Status of Geo-reactor Search with KamLAND Detector [Elektronische Daten] [Jelena Maricic] A natural nuclear fission reactor operating in the center of the Earth has been proposed by Herndon (Hollenbach and Herndon, 2001) as the energy source that powers the geo-magnetic field. The upper limit on the expected geo-reactor power is set by the estimated 12 TW (Buffett, 2003) heat flow from the Earth's core. If it exists, a nuclear reactor of that size emits a strong anti-neutrino flux. Emitted electron anti-neutrinos can be detected by the Kamioka liquid scintillator anti-neutrino detector (KamLAND) (Raghavan, 2002), and the geo-reactor power level is proporional to the anti-neutrino emission rate. KamLAND measures the geo-reactor power as a constant positive offset in detected anti-neutrino rate on top of the varying anti-neutrino rate coming from man-made reactors. Here we present the first attempt to measure the geo-reactor power. Based on a 776 ton-year exposure of KamLAND to electron anti-neutrinos, the detected flux corresponds to (6 ± 6) TW. The upper limit on the geo-reactor power at 90% confidence level is 18 TW, which is below the lower limit of the total Earth's radiogenic heat, estimated to be between 19 and 31TW (Anderson, 2003). Springer Science+Business Media, Inc., 2006 Anti-neutrinos nationallicence geo-reactor nationallicence geo-magnetic field nationallicence natural nuclear reactor nationallicence Earth, Moon, and Planets Kluwer Academic Publishers 99/1-4(2006-12-01), 147-153 0167-9295 99:1-4<147 2006 99 11038 https://doi.org/10.1007/s11038-006-9123-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11038-006-9123-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Maricic Jelena University of Hawaii at Manoa, 96822, Honolulu, HI, USA aut NATIONALLICENCE 773 0- Earth, Moon, and Planets Kluwer Academic Publishers 99/1-4(2006-12-01), 147-153 0167-9295 99:1-4<147 2006 99 11038 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer