Determination of thallium by photon activation analysis |
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| Affiliation: | 1. Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, South Africa;2. Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran;1. University College Dublin, Ireland;2. Aristotle University of Thessaloniki, Greece;1. The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, China;2. The Hong Kong University of Science and Technology, Hong Kong;1. Department of Family Medicine, USC Keck School of Medicine, 1000 S. Fremont Avenue, Unit 22, HSA Building A-6, 4thFloor, Room 6437A, Alhambra, CA, 91803, USA;2. Department of Psychology, USC Dornsife College of Letters, Arts, and Sciences, Los Angeles, 90089, CA, USA;3. Department of Psychiatry, University of California, San Diego, 9500 Gilman Drive #9116-B, La Jolla, CA, 92093, USA;4. USC School of Gerontology, Los Angeles, CA, 90089, USA;5. Department of Neurology, USC Keck School of Medicine, Los Angeles, 90033, CA, USA |
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| Abstract: | The determination of trace amounts of thallium by the thermal neutron reaction 203Tl(n,γ)204Tl is complicated because 204Tl is a pure β-emitter, requiring a lengthy and rigorous separation. In addition the half-life of 204Tl is too long to permit decay measurements. A photon activation analysis method has been developed for this determination. Bremsstrahlung from a beam of 35-MeV electrons induces the photonuclear reaction 203Tl(γ,n)202Tl. The detection limit is of the nanogram order. There are no interfering photonuclear reactions from lead. |
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