Atsuto Suzuki. 1953 1956 年 1953 年 a F. Reines G. Gamow.

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Presentation transcript:

Atsuto Suzuki

年

1953 年 a F. Reines G. Gamow

Geophysics by neutrinos, G. Marx Czech J. Phys. B19 (1969)

Nature 310 (1984)

1998 Kobayashi and Fukao, Earth as an antineutrino star, Geophys. Res. Lett. 18 (1991)

1998

2005 Nature 310 (1984)

~ 50 years after G. Gamow’s suggestion from Eligio Lisi

S. Dye, Neutrino 2012

Geo-neutrinos after KamLAND : 2  K : 40 K Detection Geo-neutrinos after KamLAND : 2  K : 40 K Detection 8B8B8B8B pp pep hep 7 Be N O F reactor at Kamioka reactor at Kamioka U U Th K K neutrino-electron elastic scattering e + p  e + + n

Geoneutrinos after KamLAND : 3 : Directionality Measurement Geoneutrinos after KamLAND : 3 : Directionality Measurement  Crust  Mantle,  Core

inverse  – decay reaction : 1 st step How to Measure Direction e p e+e+    r reconstruct  r reconstruct (cm) E = 2.5 MeV

inverse  – decay reaction : 2 nd step How to Measure Direction e p e+e+ n  E = 2.5 MeV cos 

inverse  – decay reaction : 3 rd step How to Measure Direction e p e+e+ n **  X cos  * E = 2.5 MeV

e + p  e + + n n + A  A* +  and/or  w/o  ’s +  and/or  w/o  ’s new liquid scintillator

e e ~ 1 km  13 measurement shallow detector Geo-neutrino measurement

Hawaii : Highway to the Heaven Hawaii : Highway to the Mantle

KEK Penguin Diagram dream !

E. Ohtani (Tohoku U.) Moon

Great Particle Microscopes and Neutrino Telescopes