• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.744-747
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• 2009

Plasma Display Panels (PDPs) have illustrated impressive results in terms of light emission efficiency of the Ne-Xe mixture compared with the He-Xe mixture. However, He-Xe has shown to achieve superior color purity. This paper presents the optimization of excitation efficiency and color purity for He-Ne-Xe ternary gas mixtures. Furthermore, we investigate the effect that a protective dielectric layer has on UV photon efficiency in a matrix known as electrode type PDP.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.366-368
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• 2008

The discharge characteristics of He-Ne-Xe gas mixture with the variation of Xe content are investigated through the numerical simulation. VUV efficacy in the gas condition of low Xe content increases due to more excitation and the case of high Xe content shows the improvement of VUV efficacy with the increase of He content but decreased VUV efficacy after tthe He mixing ratio of He and Ne is 0.5 due to frequent ionization.

• Bulletin of the Korean Chemical Society
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• v.23 no.2
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• pp.195-200
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• 2002

Fluorescence excitation spectrum of the trans.trans-1,3,5,7-octatetraene(OT)-Xe van der Waals clusters formed in supersonic jet expansions has been obtained. The transition lines corresponding to the van der Waals cluters of OT with Xe are observed in the lower frequency side of the OT band origin. Based on the spectral shifts, fluorescence lifetimes, and concentration dependence of the peak intensities, most of the transition lines are assigned to the $OT-Xe_n$ (n = 1, 2, 3, 4) clusters. Long progressions of a van der Waals vibrational mode are observed for n = 1, 2, 3 and 4 clusters and assigned to rocking of the OT moiety with respect to the Xe atom with the help of ab initio quantum mechanical calculation.

• Korean Journal of Materials Research
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• v.21 no.10
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• pp.532-541
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• 2011

The Xe plasma flat lamp, considered to be a new eco-friendly LCD backlight, requires a further improvement of its luminance and luminous efficiency. To improve the performance of this type of lamp, it is necessary to understand the effects of the discharge variables on the luminous characteristics of the lamp. In this study, the luminous characteristics of a coplanartype Xe plasma flat lamp with a teeth-type electrode pattern were analyzed while varying the gas composition, gas pressure and input voltage. The effects of the phosphor layer on the discharge and the luminous characteristics of the lamp were also studied. The luminous efficiency of the coplanar-type Xe plasma flat lamp improved as the Xe input ratio and gas pressure increased. Higher luminous efficiency was also obtained when helium (He) was used as a buffer gas and when a phosphor layer was fabricated on the electrode region. In contrast, the luminous efficiency was reduced with increasing the input voltage. It was found that the infrared emissions from the lamp were affected by the Xe excitation rate in the plasma, the Xe gas density, the collisional quenching of excited Xe species by gas molecules, and the recombination rate between the Xe ions and electrons.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.748-751
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• 2009

This paper provides a novel scheme to enhance luminous efficiency within Plasma Display Panels (PDPs). The He-Xe or Ne-Xe mixtures are mainly used in conventional PDP cells, where their discharge characteristics exemplify different behavior. Significantly, the excitation efficiency in He-Xe is lower than that of the Ne-Xe mixture. This paper demonstrates that by adding a small quantity of Ar or Kr gas in Ne-Xe mixture increases cell efficiency, while for the He-Xe mixtures their cell efficiency is reduced.

• Proceedings of the Optical Society of Korea Conference
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• 1991.06a
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• pp.18-21
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• 1991

청록색 영역에서 발진하는 XeF(C$\longrightarrow$A)엑사이머 레이저 여기용 2.56MeV 전자빔 가속기를 개발하였다. 대출력 전자빔 가속기는 $\pm$80kV로 충전하는 Marx Generator를 동축구조로 꾸밈으로서 낮은 임퍼던스와 인덕턴스를 유지할 수 있었고, 빠른 전압상승과 유사구형파 출력을 얻을 수 있었다. 본 연구에서는 대출력 전자빔가속기 (2.56 MeV, 2.2KJ)의 파라메터와 동작특성, 전압측정 등을 기술한다.

• Korean Journal of Optics and Photonics
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• v.4 no.1
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• pp.57-65
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• 1993

Small XeCl laser of charge transfer discharge excitation was fabricated and output charateristics were investigated according to gas mixture ratio. Beam cross section of 2.7cm${\times}$1.5cm was obtained by constructing excimer laser which preionization is operated automatically and which has chang profile electrode. According to the component gas mixture ratio, the condition of maximum output energy, efficiency were investigated. The maximum energy, efficiency and specific energy were obtained 230 mJ, 1.6% and 1.1 J/l, respectively. The long pulse effect is observed by constructing low peaking to main capacitance ratio of 1:3.

• Nuclear Engineering and Technology
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• v.55 no.1
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• pp.304-309
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• 2023

In the last decade, nuclear medicine appears to be a good choice of medicine. ⁵⁸Co, ⁹⁹Mo, ⁹⁹Tc, ⁹⁹Re, ¹³³Xe and ¹⁸⁶Re are very important radionuclides for nuclear medicine. In this study, the excitation functions of ⁵⁸Ni (n, p) ⁵⁸Co, ⁹⁹Tc (n, p) ⁹⁹Mo, ⁹⁹Ru (n, p) ⁹⁹Tc, ¹³¹Xe (n, p) ¹³¹I, ¹³³Cs (n, p) ¹³³Xe and ¹⁸⁶Os (n, p) ¹⁸⁶Re nuclear reactions were calculated at neutron energies between 1 and 20 MeV using TALYS 1.95 and EMPIRE 3.2 nuclear codes. Furthermore, the cross sections were calculated with the empirical formula derived in our past study at 14-15 MeV. The obtained results were compared with the measured values in EXFOR library, and with the evaluated data of (JENDL-4.0/HE, JEFF-3.3, TENDL-2019, ENDF/B-VIII.0, IRDFF-II, JENDL/ImPACT-18). The results are in good agreement with those of the evaluated data libraries and experimental results and indicates that these radioisotopes can be produced by smaller cyclotrons.

• Nuclear Engineering and Technology
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• v.55 no.9
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• pp.3352-3358
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• 2023

Nuclear medicine seems to be a decent choice of medicine in the recent decade. The radioactive isotopes ⁵¹Cr, ⁸⁹Sr, ⁹⁹Tc, ¹³¹I, ¹³³Xe, ¹³⁷Cs and ¹⁵³Sm are extremely essential in nuclear medicine. The excitation functions of the ⁵⁴Fe (n, α) ⁵¹Cr, ⁹²Zr (n, α) ⁸⁹Sr, ¹⁰²Rh (n, α) ⁹⁹Tc, 134Cs (n, α) ¹³¹I, ¹³⁶Ba (n, α) ¹³³Xe, ¹⁴⁰La (n, α) ¹³⁷Cs and ¹⁵⁶Gd (n, α) ¹⁵³Sm reactions were calculated in this study using the EMPIRE 3.2.3 and TALYS 1.95 nuclear codes. Additionally, the cross sections at 14-15 MeV were calculated using empirical formulae and the experimental data. The computer codes were compared to the experimental data and Empirical formulas as well as the evaluated data (TENDL 2021, JENDL 3.3, JENDL 5, JEFF 3.3, EAF 2010, CENDL 3.1, CENDL 3.2, ROSFOND 2010, FENDL 3.2 b, and BROND 3.1).

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.109-112
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• 2004

The effect of auxiliary electrode on the discharge characteristics in AC PDP with long sustain-gap was investigated. The auxiliary electrode was placed between scan and common electrode. When the pulse was applied to the auxiliary electrode during sustain period, the luminance of Ne + 13%Xe gas-mixture discharge increased and the discharge current decreased. The auxiliary pulse plays a role of improving electron excitation efficiency. When the auxiliary pulse was applied during address period, the address discharge time lag of Ne + 13%Xe gas-mixture could be reduced remarkably.