| Autor: |
Ninagawa,Kiyotaka, Yamamoto,Isao, Wada,Tomonori, Matsunami, Satoshi, Nishimura,Hiroshi |
| Přispěvatelé: |
Department of Applied Physics, Faculty of Science, Okayama University of Science/Department of Electronic Engineering, Faculty of Engineering, Okayama University of Science/Department of Physics, Faculty of Science, Okayama University/Department of Geosciences, Faculty of Science, Naruto University of Education/ Department of Geosciences, Faculty of Science, Naruto University of Education |
| Jazyk: |
angličtina |
| Rok vydání: |
1990 |
| Zdroj: |
Proceedings of the NIPR Symposium on Antarctic Meteorites. 3:244-253 |
| Popis: |
The thermoluminescence (TL) image reading technique by the TL spatial distribution readout system is improved 1) to obtain a quantitative glow curve in any part of the TL image, 2) to get fine structure of a TL image and 3) to heat a sample to a higher temperature. This technique is applied to measure the natural and artificial TL glow curves of chondrules in ordinary chondrites, ALH-77294 (H5) and ALH-77216 (L3.8). The fluctuation in the natural LT/HT (region) ratios (LT(region); photons counted in a low temperature region, HT (region); in a high temperature region) of the equilibrated chondrite ALH-77294 is small though that in the unequilibrated chondrite ALH-77216 is large. The equivalent doses of ALH-77294 and ALH-77216 can be estimated from the correlation between natural LT (region) and artificial LT (region) to be about 240krad and 16krad respectively, and are consistent with isotopic ages. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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