입자-γ 각상관에 의한 O18 핵의 낮은 에너지 준위 연구

盧泰翊 東亞大學校 1986 東亞論叢 Vol.23 No.1

It has been known that the spins of the nuclear initial states, the mixing ratios when the electromagnetic transition between states was mixed, and the population parameters of the initial magnetic substates, from the particle-γ angular Correlations between the states formed by particle-particle nuclear reaction. The magnetic substate population parameters of the low-lying exited level in O?? have been Calculated by means of Legendre Polynomial Coefficients in particle-γ-ray angular Correlations between nuclear states formed ??F(t, αγ)??O reaction that had been reported. And the spins of the low-lying level in O?? have been rechecked from these results.

Gamma선의 NE-213 Scintillator에 의한 Energy Deposition Spectrum의 계산

盧泰翊,裵世煥 東亞大學校 大學院 1989 大學院論文集 Vol.14 No.-

The Gamma-ray Energy Deposition, through the Organic Liquid Scintillator(NE-213), were calculated by means of Monte Carlo method. Gamma-rays and charged particles are traced until their energy become to be smaller than ?? cut=200keV and ?? cut=300keV respectively. In this code, Compton Scattering and Pair Productions are considered of the interactions of Gamma-ray with matter. In this thudy, the Energy Deposition Spectrums of NE-213 by the Gamma-radiation of Co-60 and Na-22. are calculted.

터미날의 效率的 運營을 위한 異機種間의 인터페이스에 관한 硏究

金益均,尹亨老,朴圭泰 연세대학교 산업기술연구소 1982 논문집 Vol.14 No.2

The current study provides an efficient method connecting the free-selected terminal among the divergent terminals, which may fit best in the various business operation characteristics, to existing host computer. More specifically, the review of network components has been made to control interface between the computer and the terminal of different type, and the analysis of NETWORK PROTOCOL controlling interface also has been made. For the better compatibility, the modification has been made between the host computer and the terminal of different type to operate properly in the general-purpose NETWORK PROTOCOL which differ from the existing host computer.

중성자 collimator의 제작 및 Am-Be 중성자 파고스펙트럼 측정

윤정란,노태익,민영기,이삼열 東亞大學校 1997 東亞論叢 Vol.34 No.-

The neutron collimator, 20cm width, 30cm length, 15cm height and 1cm diameter of hole was constructed by using polyethylene block which includes 15% boric acid. The total cross section of average 7.7MeV neutrons for Al, Cu, Au, Pb samples and the scattering angular distribution of the same energy for Al sample were measured by using 10mCi Am-Be fast neutron source. The range of average 7.7MeV neutron energy were selected from 6.45 MeV to 8.95MeV at the measured pulse height spectrum.2"Φ×2" NE-213 organic liquid scintillation detector was used on the measurement of neutron flux. The Pulse Shape Discrimination(P.S.D.) methods were used for the spectra separation of neutron with r-ray at the mixed field. The results of measurement of total cross section and scattering angular distribution for average 7.7MeV neutrons were compared with other researcher’ and ENDF/B-VI, respectively.

MgCr₂O₄와 NiAl₂O₄의 온도에 따른 tetrahedral양이온과 octahedral양이온의 위치분포 연구

李楨植,盧泰翊 東亞大學校附設基礎科學硏究所 1985 基礎科學硏究論文集 Vol.2 No.1

MgCr₂O₄와 NiAl₂O₄는 온도에 따라서 양이온의 위치가 변하는 spinel물질이다. 즉, 물질의 온도가 변함에 따라 tetrahedral 위치에 있는 양이온은 octahedral 위치로 가고 동시에 octahedral위치에 있는 양이온이 tetrahedral위치로 간다. (220)면에 대한 X-ray회절 강도는 tetrahedral위치에 있는 양이온에 의해서만 기여되는 반면 (440)면에 대한 X-ray회절강도는 tetrahedral 위치와 octahedral 위치에 있는 양이온에 의해서 기여된다. 따라서 여러가지 다른 온도에서 준비한 spinel(MgCr₂O₄와 NiAl₂O₄)들에 대한 상대적인 X-ray회절 강도비를 계산했다. 얻어진 상대적 X-ray회절 강도비, 즉 ??를 이용해서 spinel의 Normality graph를 얻었다. 이 상대적 회절 강도비에 대한 Normality graph를 이용해서 MgCr₂O₄와 NiAl₂O₄의 온도에 따른 Normality graph를 얻었다. The purpose of our study is to investigate the distribution of cations in spinels prepared at different temperatures through x-ray technique. The distribution of cations in spinel is temperature sensitive, i. e., tetrahedral site cations can go over octachedral site or vice versa. The (220) x-ray diffration intensity is originated solely from cations at tetrahedral site whereas (440) diffraction intensity is due to cations at tetrahedral site and octahedral site. From this reasoning, we calculated the relative intensity ratios of (220) to (440) on spinels (MgCr₂O₄and NiAl₂O₄) prepared at different temperatures. The obtained relative intensity ratio, i. e., I??, can predict the normality of spinels in question. In other words, the normal spinel is normality zero. Finally we obtained the temperature dependent normality graphs of MgCr₂O₄and NiAl₂O₄using our data.

고속중성자 전단면적 측정에 관한 연구

민영기,노태익 東亞大學校附設基礎科學硏究所 1999 基礎科學硏究論文集 Vol.16 No.1

Am-Be(10mCi) 및 Cf(5μCi)선원을 이용하여 흡수체에 대한 고속중성자의 전단면적을 측정하였다. 본 실험에서는 검출기로부터 흡수체의 물질과 중성자 선원간의 거리를 변화시켜 보았고, 흡수체 물질의 두께를 변화하여 투과율을 측정하였다. 또한, 정확한 투과율을 얻기 위해 Polyethylene 및 Paraffin으로 collimator를 제작하여 측정하였고, 이때 사용한 흡수체 물질은 H₂O, 금속(Au, Al, Cu, Pb)등을 사용하였다. 고속중성자 선원의 에너지는 각각 7.70MeV(Am-Be), 2.35MeV(Cf) 평균에너지였다. 실험에서 측정한 투과율로부터, 흡수체의 전단면적을 구하였고, ENDF값과 비교하여 보았다. 사용된 검출기는 2"×2" NE-213 유기액체 섬광검출기이다. We calculate total cross section of the fast neutron to the absorber using Am-Be(10mCi) and Cf(5μCi). Transmission rate were measured by varying the distance from absorber to the neutron source and the thickness of absorber. To accept transmission rate accurately, we design the collimator which made from Polyethylene and Paraffin. We use H₂O and verious metal(Au, Al, Cu, Pb) with absorber. Mean energy of the fast neutron sources are 7.70MeV(Am-Be), 2.35MeV(Cf) respectively. From the transmission rate measured by experiment, we calculate total cross section of absorber and compared with ENDF values. This experinent utilize the 2"×2" NE-213 organic liquid scintillation detector.

^161, ^163Dy의 0.003eV~50keV의 중성자 포획 단면적 측정

민영기,윤정란,노태익,김귀년,이삼열 東亞大學校附設基礎科學硏究所 2002 基礎科學硏究論文集 Vol.19 No.1

교토대학 원자로 연구소의 46MeV 전자선형가속기를 사용하여 중성자 TOF 방법으로, 에너지 영역 0.003eV∼50keV의 ^161, 163Dy sample의 중성자 포획 단면적을 측정하였다. 본 실험에서 사용된 Bi_4Ge_3O_12(BGO) 섬광 검출기는 sample의 핵반응에서 나오는 즉발 포획 감마선 측정에 사용하였다. 이 검출기는 중성자 선원으로부터 거리 12.7±0.02m 위치에 12개의 블록으로 되어 있으며, sample에 포획되는 중성자 flux의 절대치를 구하기 위해 Sm(n, γ) 및 ^10B(n, αγ) 반응을 이용하였다. ^161, 163Dy에 대한 포획 단면적 측정결과는 ENDF/B-VI 결과와 비교하였다. The neutron capture cross sections of ^161, 162Dy has been measured in the energy region from 0.003eV 50keV by using the neutron time-of-flight(TOF) promptγmethod with a 46MeV electron linear accelerator at the Research Reactor Institute, Kyoto University. An assemble of twelve pieces of BGO scintillation detectors, which was placed at a distance of 12.7±0.02mm from the neutron source, was employed as a total energy absorption detector for the prompt capture gamma-ray measurement, to obtain the absolute capture cross section value. The sample of ^161, 163Dy is a form of metallic plate. An enriched boron sample was employed to monitor the neutron flux/spectrum of the TOF beam using the standard reference cross section of the ^10B(n, αγ) reaction. Previous measurements and evaluated data in ENDF/B-VI was compared with the present results.

감마선의 질량감쇠계수 측정

정원정,민영기,노태익 東亞大學校 大學院 2000 大學院論文集 Vol.25 No.-

The mass attenuation coefficients of gamma-ray were measured by fitting method through the transmission rate according to sample thickness. The gamma-ray Collimator was fabricated with lead for narrow beam. The standard gamma-ray source, 137Cs(0.662 MeV), 54Mn(0.835 MeV), 60Co(1.173, 1.332MeV) were used, and the sample, Pb, Cu, Sn, Al were used as attenuator. The lead shielded 2˝×2˝NaI(Tl) detector was used by gamma-ray spectrometer.

NE-213 섬광검출기의 감마선 Compton edge 조사

李三烈,閔永基,盧泰翊 東亞大學校 大學院 1993 大學院論文集 Vol.18 No.-

The Compton edge of the Compton distribution of a NE-213 detector to 0.662 MeV(?Cs) and 0.835 Mev(?Mn) gamma-rays were investigated by means of the coincidence method. The Compton edge position for ?Cs and ?Mn gamma-rays were 8.9 and 5.1 percent above the peak of the compton distribution spectrum, respectively. The experiment results were compared with calculated ones.

Am-Be 선원을 통한 중성자의 전단면적 측정

민영기,오선영,노태익,박상태,이대원,이삼열 東亞大學校 1996 東亞論叢 Vol.33 No.-

Total cross sections was measured for 6.45MeV∼8.96MeV (average 7.7MeV) neutron on ??, ??, ?? absorber using ?? fast neutron source. The 2" ø×2" NE-213 organic liquid scitillation detector was used as a spectrometer of neutrons and gamma-rays. The zero crossing time analysis method was introduced in order to obtain the pulse heigh spectrum of neutrons and n-γ pulse-shape spectrum was investigated. The ratio of neutron peak for a Vally was 1:20. The total cross section resulting from the experiment enabled us to suppose a optical model as a neutron model, obtain the radius of a nuclei.