Detection method for U and Th isotopes at ppt order with ultra low-background nuclear β-γ spectroscopy

超低背景核β-γ能谱检测ppt量级U、Th同位素的方法

• 批准号: 20310029
• 负责人: SHIMA Tatsushi
• 金额: $ 11.07万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20310029/
• 关键词: 放射線計測; ・-・核分光法; ウラン系列; トリウム系列; シンチレーション検出器; 微量分析; β-γ核分光法; 元素合成; r-過程

A new method for high-sensitivity detection of radioisotopes in U and Th chains was developed. It is based on an ultra low-background beta-gamma spectroscopy, and the detector is made of stacked inorganic scintillator plates with areas as wide as 180mm×180mm. A long-time run was performed in the Oto underground laboratory to investigate the performances of the detector, and the sensitivities of 0.8ppt and 2.2ppt were achieved for the contaminations of U and Th, respectively.

建立了一种高灵敏度测定铀、钍链放射性同位素的新方法。它基于超低本底β-γ能谱技术，探测器由180 mm × 180 mm的无机闪烁体叠片构成。在Oto地下实验室进行了长时间的运行，对U和Th污染的灵敏度分别达到0.8ppt和2.2ppt。

项目成果

(・,p)反応断面積測定のための能動標的の開発

(·,p)反应截面测量活性目标的开发

• 发表时间: 2010
• 作者: 嶋達志;宮本修治;天野壯;堀川賢
• 通讯作者: 堀川賢

Experimental Study of Nuclear Astrophysics with Photon Beams

光子束核天体物理实验研究

• 发表时间: 2010
• 期刊: Proceedings of the 7th Japan-China Joint Nuclear Physics Symposium (AIP-Conference Proceedings) (印刷中)
• 作者: T.Shima;et al.
• 通讯作者: et al.

E1 and E2 cross sections of the 12C(α,γ0)16O reaction using pulsed α beams

• DOI: 10.1103/physrevc.80.065802
• 发表时间: 2009-12-01
• 期刊: PHYSICAL REVIEW C
• 影响因子: 3.1
• 作者: Makii, H.;Nagai, Y.;Ohsaki, T.
• 通讯作者: Ohsaki, T.

Dark matter search by means of segmented scintillator

通过分段闪烁体搜索暗物质

• 发表时间: 2009
• 作者: 吉川泰弘;太田周司;吉崎理華;門平睦代;吉川泰弘;村上大輔・今川朱美;周〓生・銭学鵬・大家允文;大野栄治・林山泰久・森杉壽芳・野原克仁;K.Fushimi
• 通讯作者: K.Fushimi

MOON for symmetry studies of neutrinos by double beta decays and neutrino nuclear responses

MOON 通过双β衰变和中微子核反应进行中微子对称性研究

• 发表时间: 2010
• 期刊: Nuclear Physics A Vol.844
• 作者: Okamura;H.;大西暁生・石峰・森杉雅史・田中広樹・井村秀文;H. Ejiri
• 通讯作者: H. Ejiri