[en] Gas ion implanter using Duopigatron ion sources has been used to improve surface properties of the material at PEFP(Proton Engineering Frontier Project). Gas ion implanter is limited to ion species such as feeding gases. Bernas ion source with heating elements is adopted to use heavy ions like metals. This paper is presented about feasibility of the Cu+ ions extraction from the ion source

[en] ZnO thin film is one of the metal oxide semiconductors which are widely used in light emitting/ laser applications. Recently, ZnO has gained a new substantial interest primarily because of its potentialities for spintronic, as predicted by Dielt et. al. Methods for fabricating ZnO include metal-organic chemical vapor deposition, pulsed laser deposition, electron beam physical vapor deposition, molecular beam epitaxy, ion implantation, etc. Among them, ion implantation has several advantages such as easy and precise control of the dopant concentration, elimination of the contamination and avoidance of the secondary phase. In the previous studies, ZnO films were formed in transparent insulators such as silica glass SiO₂, MgO by several methods. In the present research, we employed ion implantation method combined with thermal oxidation to fabricate ZnO thin film on sapphire substrate. X-ray diffraction (XRD) and Auger Electron Spectroscopy (AES) were applied to characterize the structure of these films

[en] A 13MHz rf cavity for an rf implanter with new concept has been developed at PEFP. Performance of this cavity is under investigation. Rf properties and high power tests showed that all designed values have been achieved. As the last phase of development of the cavity, beam test was carried out. This paper addresses the experiment set up and result for beam test with this cavity

[en] A microbeam production using the RF implanter at PEFP is in progress for research in material science. For this purpose, the energy spread of the beam less than 1% is required. A beam focusing system with a triplet quadrupole has been adopted. In order to measure the energy spread, we have developed a simple analyzing system using the disperse power of a deflecting magnet in the transport line. The instruments have been designed and installed to the beam diagnostic station which is located image position of the deflecting magnet system. Detailed work will be presented in this paper

[en] In this paper, the distribution of absorbed dose components in a polyethylene phantom for BNCT application at Dalat Nuclear Research Reactor (DNRR) were calculated using the MCNP5 code. The configuration of horizontal neutron channel No.2 of the DNRR, which contains a cylindrical collimator with neutron filters of 20-cm Si and 3-cm Bi, was simulated. The results show that the gamma dose along the central axis of the phantom has the maximum value of 1.82x10^-6 Gy at the 0.5-cm depth, and reduces to 9.05x10^-7 Gy at the 3-cm depth. The main contribution to gamma dose is due to the interaction of thermal neutron with hydrogen in the phantom via the ¹H(n,γ)²H reaction, and its value is much smaller than thermal neutron dose. The total absorbed dose along the central axis of the phantom has the maximum value of 7.87x10^-5 Gy at the 0.5-cm depth, and decreases rapidly to 1.52x10^-5 Gy at the 3-cm position, and mainly depends on the boron and thermal neutron doses caused by the ¹⁰B(n,α)⁷Li and ¹⁴N(n, p)¹⁴C reactions, respectively. (author)