| Project/Area Number |
04559002
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
広領域
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| Research Institution | University of Tsukuba |
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Principal Investigator |
NAGASHIMA Yasuo U.of Tsukuba, C.of Med.Tech., Prof., 医療技術短期大学部, 教授 (60091914)
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| Co-Investigator(Kenkyū-buntansha) |
KOMATSUBARA Tetsuo U.of Tsu, I.of Phy., Res.Assist., 物理学系・加速器センター, 助手 (10195852)
AOKI Takayoshi U.of Tsukuba, I.of Phy., Asso.Prof., 物理学系・アイソトープセンター, 助教授 (30114028)
島 邦博 筑波大学, 物理工学系・加速器センター, 講師 (70087964)
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥18,000,000 (Direct Cost: ¥18,000,000)
Fiscal Year 1994: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1993: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1992: ¥12,800,000 (Direct Cost: ¥12,800,000)
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| Keywords | AMS / TANDEM ACCELERATOR / ^<14>C / MASS ANALYSIS / AGE DETERMINATION |
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| Research Abstract |
An accelerator mass spectrometry (AMS) system has been developed with a large 12UD tandem static accelerator as a three year project starting from 1992.A 'di-molecular pilot beam method' has been tested successfully and is used for AMS measurements without any modification to the existing tandem system.
Both a negative ion source system and a particle detection system have been constructed. Both system dedicated on the AMS study are connected to the tandem system and are working very well as a essential parts of the AMS system.
Up to now, the detection of ^<14>C,^<26>Al, ^<32>Si, ^<36>Cl elements have been commenced. It is confirmed that ^<14>C measurement can be performed within 2% error and with 3*10^<-15> sensitivity. This performance is good enough for many studies using ^<14>C measurement. On the other hand, the precision of the measurement of another element is not highly now.
Hereafter, Adding to an improvement on detection accuracy of the heavier element, we are planning to measure 129I with di-molecular pilot beam method as a very important elements especially on our large tandem accelerator.
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