2002 Fiscal Year Final Research Report Summary
Development of highly sensitive high-resolution PIXE system to chemical state analysis.
| Project/Area Number |
13650054
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied physics, general
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| Research Institution | Hosei University |
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Principal Investigator |
HAMANAKA Hiromi Hosei University, Faculty of Engineering, Professor, 工学部, 教授 (10061235)
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| Co-Investigator(Kenkyū-buntansha) |
MAEDA Kuniko The Institute of Chemical Physical Research (Riken), Senior Research Scientist, 理化学研究所, 先任研究員 (60087476)
HASEGAWA Kenichi Hosei University, Faculty of Engineering, Professor, 工学部, 教授 (40010798)
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| Project Period (FY) |
2001 – 2002
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| Keywords | PIXE / PSPC / Chemical state analysis / X-ray spectrometer / Wavelength dispersive |
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| Research Abstract |
We have constructed a wavelength dispersive X-ray spectrometer equipped with a charge-division position-sensitive proportional counter (PSPC) for PIXE measurement under vacuum. A laser displacement sensor was installed in the system to determine the position of a sample in a precision of ±3μm during the ion beam bombardments. The precise measurement of sample position improved the reliability of chemical state analysis. It is important in the stability of PSPC to substitute the air in PSPC with counter gas completely. Some experiments were also performed to improve the feasibility of chemical state analysis in non-vacuum. A crystal spectrometer of v. Hamos geometry composed of a cylindrically curved crystal and a single PSPC was newly constructed. Performance of the newly constructed spectrometer is considerably improved compared to that of previously developed spectrometers for high-resolution PIXE. Sensitivity of the new spectrometer is about 10 times higher than that of a spectrometer consisting of a flat crystal and a single PSPC. Furthermore, ratio of signal peak to background noise of this spectrometer measured at sulfur K 13 is about 5 times higher than that of the spectrometer which consists of a combination of a flat crystal and the multi-stacked PSPC.
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