Affiliation: | a Tandem Accelerator Center, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba-shi, Ibaraki-ken 305-8577, Japan b Institute of Geoscience, University of Tsukuba, Ibaraki-ken 305-8571, Japan c National Institute of Advanced Industrial Science and Technology, Onogawa 16-1, Tsukuba-shi, Ibaraki-ken 305-8569, Japan |
Abstract: | This study reports the present status of our work on the hydrogen analysis of mineral and rock samples. The preparation of a standard material by means of ion implantation, a method of its calibration and the application of the method are described. The number of hydrogen atoms per unit volume in the standard material can be determined from the simultaneous observation of -particles, γ rays and –γ coincidence events for the 1H(19F, γ) reaction at the 16.44 MeV resonance energy. The hydrogen content in a natural obsidian determined with the method mentioned above is in agreement with that obtained by FTIR. A heavy-ion microbeam system under construction, which consists of a Russian-type quadrupole magnet for beam focusing, a beam defining slit system and a γ-ray detector, is also described. |