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ELTE Fizika Intezet


                             ORTVAY KOLLOKVIUM

                     2006. majus 25. , csutortok, 15 orakor
  Az ELTE Pazmany Peter s. 1/A alatti epuleteben a foldszinti 0.83 eloadoban

                                 Fiorentini, G. 
                         (University & INFN Ferrara ): 
             "Geo-neutrinos: a new probe of the Earth's interior" 

Kivonatos ismertetes:

The deepest hole that has ever been dug is about 12 km deep, a mere dent in 
planetary terms. Geochemists analyze samples from the Earth's crust and from 
the top of the mantle. Seismology can reconstruct the density profile 
throughout all Earth, but not its composition. In this respect, our planet is 
mainly unexplored. 

Geo-neutrinos, the antineutrinos from the progenies of U, Th and 40K decays 
in 
the Earth, bring to the surface information from the whole planet, concerning 
its content of radioactive elements. 
Their detection can shed light on the sources of the terrestrial heat flow, 
on 
the present composition and on the origin of the Earth. 
Long ago Georg Marx was a pioneer of this approach, which is now becoming 
practical as a consequence of two fundamental advances that occurred in the 
last few years: the development of extremely low background neutrino 
detectors 
and the progress on understanding neutrino propagation. 

I shall discuss the results from the KamLand experiment and the potential of 
this new probe of our planet. 

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