title: Enhancement of LIBS emission using antenna-coupled microwave.
abstract: Intensified microwave coupled by a loop antenna (diameter of 3 mm) has been employed to enhance the laser-induced breakdown spectroscopy (LIBS) emission. In this method, a laser plasma was induced on Gd₂O₃ sample at a reduced pressure by focusing a pulsed Nd:YAG laser (532 nm, 10 ns, 5 mJ) at a local point, at which electromagnetic field was produced by introducing microwave radiation using loop antenna. The plasma emission was significantly enhanced by absorbing the microwave radiation, resulting in high-temperature plasma and long-lifetime plasma emission. By using this method, the enhancement of Gd lines was up to 32 times, depending upon the emission lines observed. A linear calibration curve of Ca contained in the Gd₂O₃ sample was made. The detection limit of Ca was approximately 2 mg/kg. This present method is very useful for identification of trace elements in nuclear fuel and radioactive materials.
authors: Ali
authors: A
authors: Khumaeni
authors: Tampo
authors: T
authors: Motonobu
authors: Akaoka
authors: A
authors: Katsuaki
authors: Miyabe
authors: M
authors: Masabumi
authors: Wakaida
authors: W
authors: Ikuo
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008872:Microwaves; D011868:Radioisotopes / Q000032:analysis* / Q000737:chemistry*; D013057:Spectrum Analysis / Q000295:instrumentation*; D014159:Transducers
chemical_list: D011868:Radioisotopes