R&D of ultra high sensitive ^<26>Al direct detection system with an electrostatic tandem accelerator

右

• 批准号: 14350038
• 负责人: NAGASHIMA Yasuo
• 金额: $ 7.62万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350038/
• 关键词: AMS; Accelerator Mass Spectrometry; ^<26>Al; Environment; Tandem Electrostatic Accelerator; Tracer; Long lived RI; Cosmic ray origin RI; 塩素36; アルミニウム-26; 塩素-36

A ^<26>Al ultra high-sensitive accelerator mass spectrometry system, ^<26>Al-AMS, has been developed successfully on a 12UD tandem accelerator at the University of Tsukuba. A newly developed ^<26>MgO-molecular pilot beam and ^<26>Al^<13+> full stripped detection method allowed us to realize the AMS system without any modifications in the accelerator. The performances of the ^<26>Al-AMS are listed up on the followings.1)Method ^<26>AlO^-beam and ^<26>MgO^-molecular pilot beam method2)Sample Form Al_2O_33)Pilot Material ^<26>MgO_24)^<27>AlO^-ion current 〜1.5μA5)^<26>MgO^-ion current 〜5nA6)Acceleration Voltage 10MV7)Pilot Particle ^<26>Mg^<7+>8)Sensitivity <2×10-15(^<26>Al/^<27>Al)9)Accuracy 〜3%The ultra high sensitivity is achieved fortunately, but the accuracy is not sufficient and the improvement of it is strongly requested. Though the total performance of the system is not perfect at this moment, The ^<26>Al^-AMS services are commenced for the users who are planning the ^<26>Al measurements.

^<26>Al超高灵敏度加速器质谱系统^<26>Al-AMS已在筑波大学的12UD串联加速器上成功开发。新开发的^<26>MgO分子导向束。而^<26>Al^<13+>全剥离检测方法使我们无需对加速器进行任何修改即可实现AMS系统的性能。 ^<26>Al-AMS列出如下。1)方法^<26>AlO^-束和^<26>MgO^-分子引导束方法2)样品形式Al_2O_33)引导材料^<26>MgO_24) ^<27>AlO^-离子电流 ~1.5μA5)^<26>MgO^-离子电流~5nA6)加速电压10MV7)先导粒子^<26>Mg^<7+>8)灵敏度<2×10-15(^<26>Al/^<27>Al)9)精度~3%超高幸运的是达到了灵敏度，但精度还不够，强烈要求改进，虽然目前系统的总体性能还不是很完美。为计划^<26>Al测量的用户启动^<26>Al^-AMS服务。

项目成果

36Cl measurements of Hiroshima A-bombed granites

广岛原子弹爆炸花岗岩的 36Cl 测量

• 发表时间: 2004
• 期刊: Proceedings of the workshop on "New Radiation Dosimetry System DSO2 for the Atomic Bombing in Hiroshima" KURRI-KR114
• 作者: Yasuo Nagashima

AMS Activities in Japan and Outcomes

AMS 在日本的活动和成果

• 发表时间: 2004
• 期刊: Journal of Chinese Mass Spectrometry No.25
• 作者: Matsuda et al.;H.Kumagai;Yasuo Nagashima
• 通讯作者: Yasuo Nagashima

K.Bessho: "Measurement of 36Cl induced in shielding concrete of various accelerator facilities using AMS"UTTAC. 71. 99-100 (2003)

K.Bessho：“使用 AMS 测量各种加速器设施的屏蔽混凝土中诱导的 36Cl”UTTAC。

Riki Seki: "Determination of 36Cl in enviromental samples collected in the JCO by AMS"Journal of Radioanalytical and Nuclear Chemistry. 255-2. 245-247 (2003)

Riki Seki：“通过 AMS 测定 JCO 中收集的环境样品中的 36Cl”《放射分析与核化学杂志》。

Chlorine-36 in granite samples from the Hiroshima A-bomb site

广岛原子弹爆炸现场花岗岩样品中的氯 36

• 发表时间: 2004
• 期刊: Nucl. Instr. Methods Physics Res. B 223-224
• 作者: Takeda;S.;Y.Nagashima et al.
• 通讯作者: Y.Nagashima et al.