Study of Accelerator Mass Spectrometry with a Large Tandem Accelerator

1994 Fiscal Year Final Research Report Summary

• Project/Area Number: 04559002
• Research Category: Grant-in-Aid for Developmental Scientific Research (B)
• Allocation Type: Single-year Grants
• Research Field: 広領域
• Research Institution: University of Tsukuba
• Principal Investigator: NAGASHIMA Yasuo U.of Tsukuba, C.of Med.Tech., Prof., 医療技術短期大学部, 教授 (60091914)
• 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)
• Project Period (FY): 1992 – 1994
• Keywords: AMS / TANDEM ACCELERATOR / ^<14>C / MASS ANALYSIS / AGE DETERMINATION

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.

Research Products

• [Publications] Yasuo Nagashima: "Accelerator mass spectroscopy with 14C and 26A1 at the University of Tsukuba" Nuclear Instruments and Methods in Physics Research. A328. 338-341 (1993)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yasuo Nagashima: "The Construction of an Accelerator Mass Spectrometry System with 12UD Pelletron Tandem Accelerator at the University of Tsukuba" Proceedings of the Fifth Japan-China Joint Symposium on Accelerator for Nuclear Science and Their Application. 43-46 (1993)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Yasuo Nagashima: "An Accelerator Mass Spectrometry System with the 12UD Pelletron at the University of Tsukuba" Nuclear Instruments and Methods in Physics Research. B92. 55-58 (1994)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Y.Nagashima, S.Nakajima, T.Takahashi, T.Kaikura, G.Tajima, T.Hayakawa, K.Takahashi, J.Mukai, K.Shima, T.Aoki, and K.Furuno: "Accelerator mass spectroscopy with 14C and 26Al at the University of Tsukuba." Nuclear Instruments and Methods in Physics Research. A328. 338-342 (1993)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Nagashima, N.yoshizawa, H.shioya, T.Takahashi, T.Kaikura, Y.Tajima, T,Aoki, and K.Furuno: "The Construction of an Accelerator Mass Spectrometry System with 12UD Pelletron Tandem Accelerator at the University of Tsukuba." Proceedings of the Fifth Japan-China Joint Symposium on Accelerator for Nuclear Science and Their Application, Osaka. 43-46 (1993)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y,Nagashima, H.Shioya, Y.Tajima, T.Takahashi, T.Kaikura, N.Yoshizawa, T.Aoki, and K.Furuno: "An Accelerator Mass Spectrometry System with the 12UD Pelletron at the University of Tsukuba" Nuclear Instruments and Methods in Physics Research. B92. 55-57 (1994)
  • Description: 「研究成果報告書概要(欧文)」より