http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
姜榮浩 慶北大學校 1958 論文集 Vol.2 No.-
We are under the influence of natural radioactivity and artificial radioactivity caused by the experimets with atomic and hydrogen bombs. Among those radioactive isotopes are Sr 90 and Ce 144 which have been proved to be critically harmful to human bodies. Since such radioactive substances are being accumulated in the atmosphere and soil, the measurement of their intensity at present will be of considerable importance in order to make comparison with future data. This experiment was done with subsurface water, rain water, edible vegetables and some other plants available, and the results were as follows; (1) There have no great influence on mean value of background. (2) Mean value for subsurface water were very small compared to that for rain water. (3) By Table 12. it clear that isotopes in rain water have long half lives. According to the Nuclear Decay Chart (General Electric Co. USA 1956). Those isotopes were seemed to be Sb^126(28d), Cr^51(27d), Cm^24(27d), Pa^233(27.4d), Nb^95(35d), Cm^241(35d) and W^185(74d), but chemical analysis for those isotopes were not done yet that it remains to be determined whether rain water actually contains the above mentioned isotopes or not. (4) The wild edible vegetables, in general, are more radioactive than cultivated vegetables. (5) It may be that the geometrical differences of plants have a great influence on the degree of contamination; i.e. plants with big leaves with hairs are more severely contaminated than plants with small leaves and fragile stems.
姜榮浩,李相潤,都是弘 慶北大學校 1972 論文集 Vol.16 No.-
Surface barrier diodes have been fabricated by evaporating gold film (about 400 Å in thickness) on n-type silicon wafers whose resistivity was 50 ohm-cm. The breakdown voltage at room temperature was [about 30 volts, and the variation of saturation current ΔI_S as the function of temperature T(˚K) and illumination L(lux) were expressed in the form of ΔI_S=I_0 exp (α/T) and ΔI_L=KL, respectively, where I_0=3.98(A), α=-4.6×10_3(deg), and K=3.6×10^-9(A/lux.) The α-ray energy resolution for Am^241 and Ra^226 of the detectors which employed these diodes was about 5%.
大邱地區의 環境放射能調査硏究 (第4報) : (1966. 6-1968. 5) (June 1966-May 1968)
姜榮浩,李相潤 慶北大學校 1968 論文集 Vol.12 No.-
An investigation of the envrionmental radioactivity of rain water, fallout and air-borne dusts in Tagu area (E.long.128˚37',N.lat.35˚53') during a period of June, 1966 to May, 1968 has been made. During this period, there were four-times nuclear bomb tests by Red China. The results of these measurements are as follows; 1. The annual mean values of radioactivity in the rain water collected at fixed time daily were (2.15±3.08) μμ Ci/cc(1966) and 7.77±0.05) μμ Ci/cc(1967). The maximum value of the radioactivity during the period was (270.27±0.72)μμ Ci//cc on Dec. 30,1966. It seemed to be caused by the fifth nuclear bomb test by Red China on Dec. 28,1966. 2. The annual mean values of radioactivity of the fallout collected by gummed papers in 1966 and in 1967 were (46.92±0.08 muCi/ft^2-10d and (1.00±0.02) mu/Ci/ft^2-10d, respectively. The maximum radioactivity (161.1±0.15)muCi/ft^2-day(Dec.30,1966) in this investigation period was seemed to be caused by the fifth nuclear bomb test (Dec. 28, 1966) by Red China. 3. The annual mean values of radioactivity of the air-borne dusts collected by the air sampler in 1966 and in 1967 were (23.19±0.38) pu Ci/cc and (14.05±0.32)puCi/cc, respectively, The maximum radioactivity in this investigation period was(345.9±1.5) puCi/cc(Dec. 30,1966). 4. The environmental radioactivities caused by the fifth nuclear bomb test is enormously higher than that of the first test. (Dec. 16, 1964). 5. Ce^141, Ce^144, Ba^140, Ru^103, Rh^106, Zr^95, and Nb^95 nuclides were detected with gamma-ray spectrometry. 6. Autoradiographic exposure was made for falling dust samples, and the concentration of fallout particles was estimated by inspecting the autoradiography.
姜榮浩,金道聖,高在杰 慶北大學校 1981 論文集 Vol.32 No.-
Charged particles create their tracks in most dielectric solids. These tracks can be viewed under optical microscope after proper chemical etching. Tracks of uranium fission fragments in obsidians also can be viewed after etching by HF solution and used for age dating. In this paper, dating formula and experimental procedures for fission track dating are introduced. And spontaneous and induced fission tracks by thermal neutrons are counted under optical microscope (magnification of 400x). Measured fission track ages of obsidian samples, OM No. 147 and HM No. 40 are 8.86 x 10 exp (5)y and 7.67 x 10 exp(5)y, respectively.