巻号一覧
後続誌
10 巻, 11 号
選択された号の論文の6件中1～6を表示しています
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真室 哲雄, 松並 忠男, 藤田 晃, 吉川 和子1968 年 10 巻 11 号 p. 618-625
発行日: 1968/11/30
公開日: 2010/04/19
ジャーナル フリーThe fifth Chinese nuclear expbsion on 28 Dec. 1966 is believed to have been a land surface burst of about 200 kton yield. The radionuclide fractionation appearing in individual hot particles (highly radioactive fallout particles) from this explosion has been investigated by γ-ray spectrometry. The activities of the 10 radionuclides 95Zr, 97Zr, 99Mo, 103Ru, 131I, 132Te, 133Xe, 140Ba, 141Ce and 239Np were determined, and the initial atom numbers of these nuclides contained in each sample were estimated. The fractionation factor defined with respec to 95Zr was caculated as in the precedhg papers in order to express the degree of fractionation. The reslt obtained is discussed in relation to the fission-product decay chdns, and compared with that obtained on the hot particles from the earlier air bursts. Significant difference in radiochemical nature is revealed between the present hot particles from a surface burst and those from the previous air bursts.抄録全体を表示PDF形式でダウンロード (461K) -
反応操作計算の解析村田 寿典, 遊佐 英夫1968 年 10 巻 11 号 p. 626-631
発行日: 1968/11/30
公開日: 2010/04/19
ジャーナル フリーThe heat source term of the fundamental equation for the steady-state heat and mass transfer in catalyst bed was expressed as a function of the mass transfer coefficient and the effective chemical reaction rate constant presented in the previous paper. The general equation was approximated by a first-order ordinary differential equation-with axial distance from bed entrance as independent variable, and temperature in catalyst bed as dependent variable-and it was integrated numerically by HITAC 5020 F computer.
Experiments were performed with a 10cm diameter, 8cm deep bed of pqlladium catalyst supported on alumina, under the conditions of 130°C inlet temperature and 5×10102-1.5×103kg/mm2·hr mass velocity of gas, which included steam, air and hydrogen. The results obtained for temperature distribution in the bed and for hydrogen concentration in the effluent agreed closely with the calculations.抄録全体を表示PDF形式でダウンロード (2138K) -
矢島 聖使, 古屋 広高, 青木 興一1968 年 10 巻 11 号 p. 632-636
発行日: 1968/11/30
公開日: 2010/04/19
ジャーナル フリーA UO2 single crystal 10mm in diameter and 30mm long was prepared by means of the floating zone technique. In an atmosphere of 5 atm. nitrogen. a sintered UO2 rod, 17mm in diameter and 150mm long of 97% theoretical density, was heated by high frequency induction in a graphite pipe. The electronic conductivity of UO2 increased with rising temperature. When the surface temperature of the pipe attained 1, 100°C, the pipe was removed and the rod was heated directly by induction. The UO2 rod was heated at a rate of 500°C/hr, until the surface temperature became 1, 850°C (power supply 18kw). At this temperature, about 70% of the cross section of rhe rod been melted, and the nonmelted outer portion acted as crucible. Then the rod was rotated at a speed of 100r.p.m. and at the same time raised at a speed of 5mm/hr. After it reached a predetermined height, the rod was again lowered at the same speed to its original position. This double pass generated a single crystal in the central portion. Back reflection Laue photographs taken from different points of the specimen showed that the <111> direction was inclined at about 10° to the axis of the rod. No etch pits were found in the single crystal area. The result of spectroscopic analysis revealed that certain kinds of impurities were concentrated in the lower part.抄録全体を表示PDF形式でダウンロード (9114K) -
Alfred G. MADDOCK, 松浦 辰男1968 年 10 巻 11 号 p. 637-644
発行日: 1968/11/30
公開日: 2010/04/19
ジャーナル フリーA review is presented on studies on the peculiar behaviors observed on thermal and radiation annealing of certain simple solid substances, both inorganic and organic, after neutron irradiation, and discussions are given based on the various models presented for interpreting the data. Special emphasis is placed on the significance of introducing the general concepts of solid state physics-such as those on lattice defects-into the usual radiochemical approaches to this problem.抄録全体を表示PDF形式でダウンロード (518K) -
佐野 忠雄, 吉岡 一彦, 秋元 勇巳, 武藤 正1968 年 10 巻 11 号 p. 645-654
発行日: 1968/11/30
公開日: 2010/04/19
ジャーナル フリーPDF形式でダウンロード (6344K) -
今井 宗丸1968 年 10 巻 11 号 p. 655-656
発行日: 1968/11/30
公開日: 2010/04/19
ジャーナル フリーPDF形式でダウンロード (2739K)
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