| Project/Area Number |
10555019
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Applied physics, general
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| Research Institution | University of Tsukuba |
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Principal Investigator |
NAGASHIMA Yasuo College of Medical Technology and Nursing, University of Tsukuba, Professor., 医療技術短期大学部, 教授 (60091914)
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| Co-Investigator(Kenkyū-buntansha) |
AOKI Takayoshi Institute of Physics, University of Tsukuba, Associate Professor., 物理学系, 助教授 (30114028)
SEKI Riki Institute of Chemistry, University of Tsukuba, Associate Professor., 化学系, 助教授 (70015775)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥9,800,000 (Direct Cost: ¥9,800,000)
Fiscal Year 2000: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1999: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1998: ¥6,600,000 (Direct Cost: ¥6,600,000)
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| Keywords | AMS / Accelerator Mass Spectrometry / ^<129>I Element / Environment / Electrostatic Accelerator |
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| Research Abstract |
An ultra high-sensitive accelerator mass spectrometry system, AMS, has been constructed successfully on a 12UD tandem electrostatic accelerator at the University of Tsukuba. A newly developed ^<97>MoO_2 molecular pilot beam method allowed us to realize the AMS system without any modifications in the 12UD accelerator. The AMS is tuned up to ^<129>I measurements. The performances for the ^<129>I AMS are listed up on the followings.
1) Method ^<97>MoO_2 molecular pilot beam method
2) Sample form AgI 3) Pilot material ^<97>MoO_3
4) Iodine ion current 〜10μA 5) ^<97>MoO_2 ion current 〜10nA
6) Acceleration voltage 9.7MV 7)Pilot particle ^<97>Mo^<9+>
8) Sensitivity 5×10^<-13> (^<129>I/^<127>I) 9)Accuracy 〜15%
The improvement of the accuracy is strongly requested and it is under going. Though the performance of the system is not perfect now, the ^<129>I-AMS services are started for the users who want to measure the ^<129>I element.
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