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Volume 34, Issue 10
Displaying 1-12 of 12 articles from this issue
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Kazuhisa KOMURA, Mikio YANAGISAWA, Jiro SAKURAI, Masanobu SAKANOUE1985 Volume 34 Issue 10 Pages 529-536
Published: October 15, 1985
Released on J-STAGE: December 13, 2010
JOURNAL FREE ACCESSUranium, thorium and potassium contents and radioactive equilibrium states of the uranium and thorium series nuclides have been studied for 2 phosphate rocks and 7 phosphate fertilizers. Uranium contents were found to be rather high (39-117 ppm) except for phosphate rock from Kola. The uranium series nuclides were found to be in various equilibration states, which can be grouped into following three categories. (1) Almost in the equilibrium state, (2) 238U≈230Th>210Pb>226Ra and (3) 238U>230Th>210Pb>226Ra. Thorium contents were found to be, in general, low and appreciable disequilibrium of the thorium series nuclides was not observed except one sample. Potassium contents were also very low (less than 0.3% K2O) except for complex fertilizers. Based on the present data, discussions were made for the radiation exposure due to phosphate fertilizers.View full abstractDownload PDF (1002K) -
Kazutoshi SUZUKI1985 Volume 34 Issue 10 Pages 537-542
Published: October 15, 1985
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThe excitation functions were measured for the nuclear reactions of 55Mn (p, 4n) 52Fe and 55Mn (p, n) 55Fe by using thin manganese disks, specially prepared under a pressure of 200-250 kg/cm2 at 400-500°C for 0.5-1 hour. The maximum cross section in the excitation function for the 55Mn (p, 4n) 52Fe reaction was found to be 1.4 mb at Ep=54 MeV. From the yield curve, 24.8 MBq/μA h (670μCi/μAh) of 52Fe was estimated to be produced with 0.45% 55Fe contamination in the energy region between 73 and 39MeV. Iron-52 was produced in the yield of 85-93% to the expected value from the yield curve in the energy region of 44-60 MeV. For the separation of 52Fe, the radiochemical yield of 52FeCl3was 70-92% and its radionuclidic purity was higher than 99%. Manganese-52m was obtained repeatedly by eluting the anion exchange column adsorbing 52Fe with 6N-HCl in 99.9% radionuclidic purity and 86% yield to the expected value. The amount of 55Fe in a large quantity of 52Fe could be determined in 1-2 days from end of bambardment (EOB) by analyzing decay curve of Mn-Kα-X ray from 52Fe and 55Fe.View full abstractDownload PDF (719K) -
Norikatsu OOTSUKA, Tadatoshi YAMAMOTO, Kohei TSUKUI1985 Volume 34 Issue 10 Pages 543-549
Published: October 15, 1985
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThe experiments on the degassing of dissolved 85Kr by the N2-stripping method were carried out to examine the influence of temperature and properties of solvent, as well as flow rate of N2 gas on the degassing efficiency.
The half-life period in case of the decrease in concentration of the dissolved 85Kr which was used as an index of degassing efficiency, was proportional to the reciprocal of temperature and was inversely proportional to the flow rate of N2 gas. It became longer with increasing the viscosity of solvent. No influence on the degassing efficiency was observed to be exercised by the solubility of Kr gas in solvent and the surface tension of solvent. For organic solvents belonging to a homologous series, the half-life period became longer with increasing the carbon number, molecular weight and boiling point of solvent, respectively.View full abstractDownload PDF (719K) -
Kayoko NAKAMURA, Iku NISHIGUCHI, Yaeko TAKAGI, Atsushi KUBO, Shozo HAS ...1985 Volume 34 Issue 10 Pages 550-554
Published: October 15, 1985
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThallium-201 distribution in the blood was investigated both in vivo and in vitro. Thal-lium-201 was distributed into the erythrocytes and plasma with the ratio of 1.4±0.3 to 1.0, immediately after its administration. The uptake of 201Tl into the erythrocytes in vitro were affected by the incubation temperature and the presence of ouabain and KCl; indicating that the 201Tl was uptaken into cells partly through their membranes Na, K-ATPase. Erythrocytes could retain 201Tl in it, whereas 201Tl was present as free ion in the plasma. Thallium-201 was flew out of erythrocytes into the plasma, keeping the ratio of 201Tl in erythrocytes/plasma to be 1.9±0.2/1.0.View full abstractDownload PDF (496K) -
Kazuhisa KOMURA1985 Volume 34 Issue 10 Pages 555-558
Published: October 15, 1985
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSMeasurements of fallout 207Bi in environmental samples were reported for water filters used at the Scott Base in Antarctica and the surface soils containing high amount of fallout nuclides. The level of 207Bi in these samples was found to be nearly the same or a little higher than that of fallout 60Co and the 207Bi/137Cs activity ratios were in the range of 0.001-0.018. Contamination of bismuth by 207Bi was found in “high purity” bismuth on market and its level was measured to be 1.9 mBq/g-Bi.View full abstractDownload PDF (461K) -
Syozi MASUKO, Shigeru KASAHARA1985 Volume 34 Issue 10 Pages 559-562
Published: October 15, 1985
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSUtilization of the computer for radiation control is planned and performed in many radioisotope laboratories. But each laboratory has their own situation which makes the planning difficult with respect to the hardware and particularly to the software.
What is the most important is that the practice of radiation management is different for each laboratory both in point of view and in the form of recording. Therefore, the computer program for the radiation management, especially for the management of radioisotopes is required to meet many amendments.
In this standpoint, we have developed a “programless language” or “programless software” and have used in our work for several years.
As the result of our experience, we have found that the programless language is quite satisfactory for the management of radioisotopes and that it has an advantage in some aspects over conventional programs.
It is thought that this “programless language” is effective not only for our own works, but also applicable to other radioisotope laboratories.View full abstractDownload PDF (461K) -
Shohgo SUZUKI, Shoji HIRAI1985 Volume 34 Issue 10 Pages 563-566
Published: October 15, 1985
Released on J-STAGE: July 21, 2010
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Kunihiko ITO, Eiji Ino, Takashi SAITO, Takehiko TSUCHIYA1985 Volume 34 Issue 10 Pages 567-569
Published: October 15, 1985
Released on J-STAGE: July 21, 2010
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Akihisa SAKUMOTO, Hidehiko ARAI1985 Volume 34 Issue 10 Pages 570-579
Published: October 15, 1985
Released on J-STAGE: July 21, 2010
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Hideo SAITO, Otomaru SATO, Masao KATO, Yoichi ISHIDA1985 Volume 34 Issue 10 Pages 580-586
Published: October 15, 1985
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (701K) -
1. Ion Beam AnalysisSusumu MORITA1985 Volume 34 Issue 10 Pages 587-596
Published: October 15, 1985
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (1375K) -
1985 Volume 34 Issue 10 Pages A73P-A106M
Published: October 15, 1985
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (3296K)
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