• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.147.4-147
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• 1998

• Proceedings of the Korean Magnestics Society Conference
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• 2007.05a
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• pp.98.1-98.1
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• 2007

• Proceedings of the Korean Society of Medical Physics Conference
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• 2006.08a
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• pp.8-9
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• 2006

• Proceedings of the Korean Society of Potoscience Conference
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• spring
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• pp.33-33
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• 1996

• Proceedings of the Korean Magnestics Society Conference
• /
• 2008.12a
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• pp.157.1-157.1
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• 2008

• Proceedings of the Optical Society of Korea Conference
• /
• 2001.02a
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• pp.250-251
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• 2001

There is a considerable interest in the generation of a cold atomic beam having a narrow velocity spread that can be used in various experiments in physics such as ultrahigh resolution atomic and molecular spectroscopy, atom optics, atom interferometry, study of solid surfaces, and low energy collision experiments. The invention of the techniques of laser cooling has stimulated developments in the production of cold and bright atomic beams. (omitted)

• Nuclear Engineering and Technology
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• v.53 no.6
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• pp.2025-2037
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• 2021

The influence of lead cations on natural quartz (QZ) from Egypt as a glass shielding material for the composition with nominal formula (10Na₂O - (90 - x) QZ - xPbO (where x = 30, 35, 40, 45 and 50 mol %)) was examined. The studied samples are synthesized via the melt quenching method at 1050 ℃. The X-ray diffraction XRD patterns were confirmed the glass nature for studied samples. Moreover, the optical properties, and the transparency for all compositions were examined by UV-Vis spectroscopy. Also, the major elemental composition of the natural quartz were estimated via the X-ray fluorescence (XRF) technique. Further, the density and molar volume were determined. Furthermore, the nuclear shielding parameters such as, mass attenuation coefficient, effective atomic number, electronic density, the total atomic, and electronic cross sections as well as the mean free path, and the half value layer with different gamma ray energies (81 keV-1407 keV) were calculated. Besides, the results showed that the shielding behavior towards the gamma ray radiation for all glass samples was increased as the increment in PbO concentration in the glass system.

• Proceedings of the Korean Vacuum Society Conference
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• 1996.06a
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• pp.132-133
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• 1996

• 한국초전도학회:학술대회논문집
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• 2008.08a
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• pp.22-22
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• 2008

• Korean Journal of Crystallography
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• v.9 no.2
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• pp.92-95
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• 1998

The structure of bis(isocyanto-N)nickel (II) complex, [Ni(L)(NCO)2] (L: 2,5,9,12-tetramethyl-1,4,8,11-tetraazacyclotetradecane), is centrosymmetric and the central nickel has an axially elongated octahedral geometry with two nitrogen atoms of the isocyanate ligand.