Reflection of microwave from energy deposit by X-ray irradiation in rock salt: Implication of an ultra high energy salt neutrino detector to act like a radio bubble chamber
msra(2007)
摘要
Existence of GZK neutrinos (ultra high energy neutrinos) have been justified
although the flux is very low. A new method is desired to use a huge mass of a
detector medium to detect them. A fundamental study of radar method was carried
out to measure microwave reflection from electromagnetic energy deposit by
X-ray irradiation in a small rock salt sample. The reflection rate of 1x10^-6
was found at the energy deposit of 1x10^19 eV which was proportional to square
of the X-ray intensity suggesting the effect to be coherent scattering. The
decay time of the reflection was several seconds. This effect implies a large
scale natural rock salt formation could be utilized like a bubble chamber
irradiated by radio wave instead of visible light to detect GZK neutrinos.
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关键词
neutrino detector,visible light
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