| Autor: |
Shi Guozhu, He Guozhu, Zhang Dawei, Huang Chuntang, Li Chaoli, Jiang Shan, Wu Shaoyong, He Ming, Wang Wei, Shen Hong-tao, Wu Shao-Lei, Wang Xianggao |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Chinese Physics C. 34:192-197 |
| ISSN: |
1674-1137 |
| DOI: |
10.1088/1674-1137/34/2/007 |
| Popis: |
The rare isotope 236U has a half-life of 2.342(3) × 107 years, and is produced principally by thermal neutron capture on 235U. The isotopic atom ratio of 236U/238U depends on the integral thermal neutron flux received by the material of interest. 236U is potentially useful as a "fingerprint" for indicating the presence of neutron-irradiated uranium usually originating from nuclear activity. By extracting negative molecular ion UO− from the uranium oxide target, simulating the 236U16O− beam transport with 238U16O− and 208Pb216O− pilot molecular ion beam, transporting the 236U-containing ion beam with a high resolution injection magnet analyzer and electrostatic analyzer system, and finally identifying and detecting 236U with a time-of-flight detector (TOF), a method for AMS (Accelerator Mass Spectrometry) measurement of 236U was established on the HI-13 Accelerator AMS system at China Institute of Atomic Energy. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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