Takeshige Nakabayashi

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(14)C in rice grains is a useful tracer of atmospheric (14)C(CO(2)). (14)C measurement in rice grains for 17 years during 1982--1999 reveals the following. There is negative correlation between Delta(14)C and the population densities of localities in Japan. Under-populated areas in the northern area of Japan and Okinawa remained clean in the 1990s. The(More)
The η-meson photoproduction cross sections have been measured on the C and Cu targets for the photon energies between 600 and 1100 MeV to investigate the behavior of the S11(1535) resonance in a nucleus. The excitation functions of the cross section as well as the angular and momentum distributions of η-mesons are in quantitative agreement with the(More)
The η-meson photoproduction cross sections have been measured on the C and Cu targets for the photon energies between 600 and 1100 MeV to investigate the behavior of the S11(1535) resonance in a nucleus. The excitation functions of the cross section as well as the angular and momentum distributions of η-mesons are in quantitative agreement with the(More)
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