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| Content Provider | Springer Nature Link |
|---|---|
| Author | Fukumoto, Ken ichi Lie, Zener Sukra Hedwig, Rinda Khumaeni, Ali Niki, Hideaki Kagawa, Kiichiro Lee, Yong Inn Kurniawan, Koo Hendrik Kurihara, Kazuyoshi |
| Copyright Year | 2012 |
| Abstract | Our previous work on an innovative method of hydrogen (H) analysis using the specific characteristics of a TEA CO$_{2}$ laser, “selective detection method of H”, has been improved to realize a high H sensitive analysis with a detection limit of several µg/g. For this purpose, first, we clarified the origin of the H emission disturbance coming from H2O molecules; namely, we showed that most of the H emission came from H$_{2}$O on the metal surface and not from H$_{2}$O existing in the surrounding gas when we formed a laser-induced gas plasma. Second, the difference in the emission characteristics between the H emission from H$_{2}$O on the metal surface and H emission from inside in sample was studied to determine the optimum gating time of the optical multi-channel analyzer (OMA). Third, the gas plasma was totally covered by fresh helium gas using a big pipe (5 mm in diameter) and by flowing a high amount of He (10 l/min). Also, we demonstrated that our methods could potentially be applied to H analysis in steel samples, where an H analysis with a sensitivity of less than 1 µg/g is required without employing a heating process, by removing H$_{2}$O on the sample surface with the aid of defocused TEA CO$_{2}$ laser irradiation. Thus, we stress that our method can be used for a highly sensitive, in-situ analysis of H for metal samples. |
| Starting Page | 49 |
| Ending Page | 54 |
| Page Count | 6 |
| File Format | |
| ISSN | 03744884 |
| Journal | Journal of the Korean Physical Society |
| Volume Number | 61 |
| Issue Number | 1 |
| e-ISSN | 19768524 |
| Language | English |
| Publisher | The Korean Physical Society |
| Publisher Date | 2012-07-11 |
| Publisher Place | Seoul |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Selective detection of H Hydrogen analysis in film Excitation through helium metastable Zircaloy sample Theoretical, Mathematical and Computational Physics TEA CO$_{2}$ laser LIBS Hydrogen analysis Physics Particle and Nuclear Physics Laser-induced gas plasma |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy |
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