[en] International nuclear control regime is composed of three parts; safeguards, export control and physical protection. The objective of this project is to recommend a way to construct effective and efficient national nuclear control system competent with the strengthened international nuclear control system. To accomplish this objective, the project was divided into five small subjects; national accountancy system or SSAC, physical protection system, export/import control system, legal system and optimization of the implementation of the national nuclear control system. Each subject analyzed current national system and reviewed other major countries' systems in order to derive the optimal national nuclear control system reflecting international trend and domestic situation. Some of the outputs such as the amendment draft of Atomic Energy Act, Ordinance and Regulation were already reflected to the respective laws while draft amendment and establishment of five decrees are under consideration by the related agencies and organizations. Organization of the Export/Import Review Committee was already reflected in the ordinance. Check list for the physical protection inspection for the facility was drafted. Optimized national nuclear control system was proposed in this report which was used for the reorganization of the system by the government. This report will be able to contribute to enhance nuclear transparency and credibility of the nuclear activities in Korea through the contruction of an optimized national control system

[en] Events of the type π^-p→nηπ⁺π^- and π^-p→nηπ⁰ at 18GeV/c are analyzed. The mass and width of the neutral and charged a₀(980) were determined. The neutral a₀ is found to have a mass of (0.991±0.0025)GeV/c² and a width of (0.069±0.011)GeV/c². A partial wave analysis technique yields (0.9983±0.0040) and (0.072±0.010)GeV/c² for the mass and width of the charged a₀. copyright 1998 The American Physical Society