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A hybrid experiment consisting of emulsion chambers, burst detectors and the Tibet-II air-shower array was carried out at Yangbajing (4300 m a.s.l., 606 g/cm2) in Tibet to obtain the energy spectra of primary protons and heliums. From three-year operation, these energy spectra are deduced between 10 15 and 1016 eV by triggering the air showers associated with a high energy core and using a...
Simultaneous observation of γ-families and their accompanying air showers was performed at Yangbajing (4300m above sea level) in Tibet with the emulsion chambers and burst detectors which were linked with the Tibet-II air-shower array. For three years operation, we observed 177 γ-families (∑E γ >20TeV) accompanying air showers with the size N e >2×10 5 . Using this data...
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