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重力場에서 Photon이 받는 deflection에 대한 硏究
崔勝平 朝鮮大學校 文理科大學 1973 論文集 Vol.1 No.-
Photoelecric effect and compton scattering uggest that a photon apparently acts as well a particle, and has a movement-mass. Therefore thae photon will be forced and deflected by the gravitational field caused by a material particle. This paper calcurates the angular deflection of a photon which passes by the material particle at its edge.
Electroless Plating으로 形成된 Ni 金屬薄膜의 成長에 關한 硏究
崔勝平,朴福男,李官敎,崔聖休,金炫九 조선대학교 기초과학연구소 1983 自然科學硏究 Vol.6 No.1
Electroless nickel plating from hypophosphite baths was applied to produce deposits of nickel-phosphorus on a plastic substrate. Autocatalytic deposition took place only on the pretreated plastic surfaces. L.J. Van der pauw's method was used for measuring the Hall effect of nickel-phosphorus film. The specific resistivity was about 6.26×10^-6Ωㆍm Since current distribution is of no concern in electroless plating, deposits was much more uniform on the plastic substrate than electrolytically produced coatings.
崔勝平,李官敎,徐東珠 조선대학교 기초과학연구소 1980 自然科學硏究 Vol.3 No.1
We have studied the performance of the gas proportional counter tube using a mixture of argon and carbon cioxide (Ar-98%, CO_2-2%). In this report, by using a heating system, a gas proportional tube made of copper cylinder was covered with Cu_2O thin film. It's characteristics depending on the pressure in the counter tube are described. The shape and plateau curves resulting from the data were very similar to measurements which were reported in the past. We found that the possibility of production of the gas proportional counter tube exists in our laboratorty.
Geiger-Mu¨ller 計數管의 製作과 消減gas 混合比에 관한 硏究
崔勝平,徐東珠 조선대학교 기초과학연구소 1982 自然科學硏究 Vol.4 No.2
It was studied the performance of the Geiger-Mu¨ller counter tube using a mixture of Ar gas and amyl alcohol gas. In this report, by using a chemical method, a Geiger-Mu¨ller counter tube made of. copper cylinder was coated with Cu_2O thin film. When the pressure and the mixing ratio of quenching gas in the Geiger-Mu¨ller counter tube were 10cmHg, 20cmHg, 30cmHg, 40cmHg and 5%, 10%, 15%, the characteristical curve of Geiger-Mu¨ller counter tube were showed in Fig.4, Fig.5, Fig.6, and Fig.7, respectively. In the case of the pressure 20mHg and the ratio 5%, the percentage slope and operating voltage resulting from data of Fig.5 were 0.009%, 1,300 volt, respectively. It is found that the possibility of production of the Geiger-Mu¨ller counter tube exists in our laboratory.
최승평,홍광준 조선대학교 기초과학연구소 1999 自然科學硏究 Vol.22 No.1
A fiber optic magnetic sensor(FOMS) was made of single-mode optical fiber deposited Metglas cast alloy by using magneton sputtering. The matallic-glass-coated optical fibers were used as magnetic field sensing parts in one arm of a Mach-Zehnder interferometer. Inside a chamber containing Helmholtz coils which produced both a dc field and an ac field the sensing part was placed. the phase shift were measured as a function of the magnitude of the dc field and the frequency of the ac field. The phase shift amplitude to the magnitude of the ac field was measured to be 0.91rad/Oe, and a resonance enhancement factor of Q=95 was exhibited at the 245Hz frequency.
Geiger-Mu¨ller 計數管의 製作과 消滅gas 混合比에 관한 硏究
崔勝平,徐東珠 朝鮮大學校 自然科學硏究所 1982 自然科學硏究 Vol.5 No.-
It was studled the perforniance of the Geiger-Mu¨ller counter tube using a mixture of Ar gas and amyl alcohol gas. In this report, by using a chemical method, a Geiger-Mu¨ller counter tube made of copper cylinder was coated with Cu_(2)O thin film. When the pressure and the mixing ratio of quenching gas in the Geiger-Mu¨ller counter tube were lO㎝Hg, 20㎝Hg, 30㎝Hg, 40㎝Hg and 5%, 10%, 15%, the characteristical curve of Geiger-Mu¨ller counter tube were showed in Fig.4, Fig.5, Fig.6, and Fig.7, respectively. In the case of the pressure 20㎝Hg and the ratio 5%, the percentage slope and operating voltage resulting from data of Fig.5 were 0.009%, 1,300 volt, respectively. It is found that the possibility of production of the Geiger-Mu¨ller counter tube exists in our laboratory.
화학적침전법으로 제조된 Ba(Ce_x,Ti_1-x)O_3의 유전 특성에 관한 연구
최승평,박향숙 조선대학교 기초과학연구소 1998 自然科學硏究 Vol.21 No.1
Ba(Ce_x, Ti_(1-x))O_3 powders have been obtained by the pyrolysis of barium titanyl oxalate adding 0.04 mol% CeCl_3 solution. After calcinating the powders were cold-pressed into discs 10 mm dia. and 1 mm thick using a stainless steel die with a fabrication pressure of 24000 p.s.i.. The compacts were sintered in air at 1350℃ for 2hrs in a silicon tube furnace of SiC heating elements. The results that the permittivities at the Curie temperature are rapidly increased regardless of the amounts of Ce compound included in the barium titanate matrix agree with Curie-Weiss law.
P^(147)_m의 Beta 붕괴의 의한 K-shell Shake off Ion化 확률
崔勝平,李相烈 조선대학교 원자력연구소 1982 原子力硏究 Vol.2 No.-
The probability of K-shell ionization in the beta decay of P_m^147 have been measured to be (0.98±0.08) X 10^4. The experimental result was compared with the values obtained from the previous measurements and the a model based on vacany creation mechanisms of shake off. A new theoretical approach taking account of the final correlation is desired to understand the phenomenon.
Zn^(65)電子捕獲붕괴에서의 幾何學的 效率 a_kε_k 測定
崔勝平 조선대학교 원자력연구소 1981 原子力硏究 Vol.1 No.-
A geometrical efficiency a_k??_k has been studied in the electron capture decay of Zn^65 by recording coincidences between 1.115Mev gamma ray and K x-rays emitted when the vacancy is filled. A Si(Li)x-ray detector was used in conjunction with a NaI(T1) detector for these measurements. The result obtained for a_k??_k, the geometrical efficiency per K capture that K-shell vacancy is formed, is 6.135 x 10 ^-3. The value is to help indicate the path to improvements in the measurement of probability for K-shell ionization.