Measurement of the H2-D mass difference with a nuclear microprobe |
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Authors: | H Sekiguchi T Nishijima and I Nashiyama |
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Affiliation: | Electrotechnical Laboratory. 1-1-4 Umezono, Tsukuba-shi, Ibaraki, 305, Japan |
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Abstract: | A 1.24 MeV deuteron (D) beam mixed with a H2 molecular beam was separated with a microslit system of a nuclear microprobe consisting of a 100 μm diameter object and a 1 mm diameter aperture diaphragm. D was distinguished from H2 by Rutherford backscattering (RBS) on a thin Au film. By slightly changing the magnetic field strength of the beam steerer installed in front of the object diaphragm, the maximum and the minimum RBS D/H2 ratios were found to be 50.3 and 1.5, respectively. M/ΔM = 3.9 × 103 was obtained as the mass resolution of the nuclear microprobe. The transmission of this system was 2 × 10?3. |
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