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Tsuneo KOBAYASHI, Yuji TAKAKU
1997 Volume 46 Issue 9 Pages
603-614
Published: September 15, 1997
Released on J-STAGE: September 07, 2010
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To survey the level and behavior of 222Rn
and 220Rn
progeny in air, measurements were made intermittently (once a day at an identical time) for 4 years at the campus of the authors' college located in the northeastern part of Japan. A filtration method with alpha spectroscopy, using an evacuated chamber, clearly separated 212Po
peak from others. Outdoor and indoor air were sampled every morning except holidays. A definite seasonal variation, higher concentrations in autumn and in winter, was observed except indoor 220Rn
progeny.
222Rn
progeny revealed log-normal distribution, whereas 220Rn
progeny revealed Poisson-like distribution. Multiple regression analysis and correlation analysis indicated that most of indoor 222Rn
progeny originates from outdoor air. From time series analysis, several-day periods were often observed, which will probably be attributed to the wind speed.
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Takashi SUZUKI, Sigeru TAKATA
1997 Volume 46 Issue 9 Pages
615-621
Published: September 15, 1997
Released on J-STAGE: September 07, 2010
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By using volume reference sources (matrix : perlite, alumina, manganese dioxide) which contain nine nuclides (
109Cd,
57Co,
139Ce,
51Cr,
85Sr,
137Cs,
54Mn,
88Y,
60Co),
the photopeak efficiency curve related to linear attenuation coefficient for a n-type germanium detector was obtained. As a result, a smooth curve was obtained in the low energy region below 88 keV, regardless of matrix. And the mass attenuation coefficient was expressed by one function for various materials in the energy region from 10 keV to 2MeV. By using these curves, nuclides emitting low energy gamma-and/or X-rays can be determined quantitatively within about 10% of error.
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Kazuhiro SHIBA, Hirofumi MORI
1997 Volume 46 Issue 9 Pages
622-626
Published: September 15, 1997
Released on J-STAGE: September 07, 2010
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In order to estimate the internal exposure dose in an experiment using tritiated thymidine, the rate of volatile 3H-
decomposition of several tritiated thymidine samples was measured. The decomposition rate of [methyl-
3H]
thymidine in water was over 80% in less than one year after initial analysis. [methyl-
3H]
thymidine was decomposed into volatile and non-volatile 3H-
decomposition products. The ratio of volatile 3H-
decomposition products increased with increasing the rate of the decomposition of [methyl-
3H]
thymidine. The volatile 3H-
decomposition products consisted of two components, of which the main component was tritiated water. Internal exposure dose caused by the inhalation of such volatile 3H-
decomposition products of [methyl-
3H]
thymidine was assumed to be several μSv.
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Miyoko NAKANO, Kazuo IWATANI, Hideto KURA, Chie KOHCHI, Osamu YAMAMOTO
1997 Volume 46 Issue 9 Pages
627-631
Published: September 15, 1997
Released on J-STAGE: September 07, 2010
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Three kinds of charcoal (LH2C20/48, WH5C8/32 and X-7100-3), three kinds of ion exchange resin (DE52, MB5113J and RG501 /X8), and one metal chelater (MC75) were tested for their ability to remove [α-
32P]
dCTP as a standard RI using a small column system. The most efficient absorber was DE52. However, DE52 was not suitable for practical treatment of the waste because flow rate was slow. LH2C20/48, WH5C8/32 and MB5113J also showed high absorption ability and their absorption efficiency was not affected by a pH range from 5 to 9 of the solution. On the basis of this result, a practical trial of the radioisotope waste treatment was also made. It was concluded that among the tested absorbents MB5113J was the most applicable for removing 32P-
labeled nucleotides from experimental waste.
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Nanako O. OGAWA, Keisuke KOBA, Ayato KOHZU, Eitaro WADA
1997 Volume 46 Issue 9 Pages
632-644
Published: September 15, 1997
Released on J-STAGE: December 13, 2010
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Yasuhito IGARASHI, Michio AOYAMA, Takashi MIYAO, Katsumi HIROSE
1997 Volume 46 Issue 9 Pages
645-650
Published: September 15, 1997
Released on J-STAGE: December 13, 2010
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1. Technical Support Activities in Tokyo Metropolitan Industrial Research Institute
Takeo MUROYAMA
1997 Volume 46 Issue 9 Pages
651-656
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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Isamu ISHIKAWA
1997 Volume 46 Issue 9 Pages
657-663
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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8. Neutron Radiography Application to Archaeological Objects
Fumitake MASUZAWA
1997 Volume 46 Issue 9 Pages
664-669
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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1. Radioisotope Production
Toshiaki SEKINE
1997 Volume 46 Issue 9 Pages
670-674
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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Hiroshi TOMINAGA
1997 Volume 46 Issue 9 Pages
675-680
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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Masato TODA
1997 Volume 46 Issue 9 Pages
681-687
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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Koji ONO
1997 Volume 46 Issue 9 Pages
688-692
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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[in Japanese], [in Japanese]
1997 Volume 46 Issue 9 Pages
693-694
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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[in Japanese]
1997 Volume 46 Issue 9 Pages
695-696
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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[in Japanese]
1997 Volume 46 Issue 9 Pages
697-698
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
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[in Japanese]
1997 Volume 46 Issue 9 Pages
699-701
Published: September 15, 1997
Released on J-STAGE: December 13, 2010
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—Newly Developed Immunoassay and DNA (RNA) Analysis—
Immunoassay Research Society of Japan
1997 Volume 46 Issue 9 Pages
i-xxii
Published: September 15, 1997
Released on J-STAGE: July 21, 2010
JOURNAL
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