Abstract
The lead/thallium ratio in a sample of Allchar lorandite (Tl·As·S2) has been measured to be (5.2±1.3)×10-6 by means of an alpha activation analysis. The mineral of this mine is expected to be suitable for the geochemical 205Tl solar neutrino experiment. The α activities were measured with a surface barrier detector of 200 mm2 active area and 0.2 mm sensitive depth. For the measurement a disc source with a radius of 18 mm and a thickness of about 10 μm was produced by powderizing the target. The distance target-detector was 12 mm. Due to the thickness of our source the energy of the α line was smeared out.
Original language | English |
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Pages (from-to) | 266 |
Number of pages | 1 |
Journal | Nuclear Instruments and Methods In Physics Research |
Volume | 271 |
Issue number | 2 |
State | Published - 1 Jan 1988 |
Event | Proceedings of the International Conference on Solar Neutrino Detection with 205Tl and Related Topics - Dubrovnik, Ygosl Duration: 29 Sep 1986 → 3 Oct 1986 |