Katsumi Hirano

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The recycling of waste plastics that include plastics that contain chlorine, such as polyvinyl chloride, is difficult because the chlorine leads to the corrosion of equipment. Then, the dechlorination method of waste plastics containing chlorine (CCWP) that consists of a series of melt process and hot water process was examined. CCWP was put into the melt(More)
Additive effects of glass powder upon the product yields and chlorine distribution after liquefaction of hydrothermally pretreated mixed waste (HMW) are compared with liquefaction of HMW with any one of water, quartz sand, or glass powder plus water. As a result, addition of either water or quartz sand did not affect liquefaction and dechlorination of HMW.(More)
2 2 Na and the stable isotope 2 3 Na. The accuracy of that experiment was, however, low, because the specif ic activity measurement was based on the assumption that the sodium nitrate was pure, while a certain contamination due to thermal decomposition, corros ion of the packing material, etc. could hardly be avoided. The purpose of the present work is to(More)
The process of spontaneous parametric down-conversion (SPDC) in nonlinear crystals makes it fairly easy to generate entangled photon states. It has been known for some time that the conversion efficiency can be improved by employing quasi-phase-matching in periodically poled crystals. Using two single-photon detectors, we have analyzed the photon pairs(More)
8 A . LUNDEN, Z . Natur fo r s ch . 2 1 a , 1 5 1 0 [ 1 9 6 6 ] . 9 H. KANNO, J. Nucl. Sei. Technology 7, 428 [1970]. 10 I. OKADA, Thesis, Tokyo 1966. 11 J. E. FREUND, Mathematic. Statistics, Prentice-Hall, Englewood Cliffs, N. J. 1962. 12 It is quite likely that we underestimated the temperature in the separation tube somewhat for our old experiments with(More)
The Gamma Ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT) is a pair-production high-energy (>20 MeV) gamma-ray telescope being built by an international partnership of astrophysicists and particle physicists for a satellite launch in 2006, designed to study a wide variety of high-energy astrophysical phenomena. As part of the development(More)
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