Neutron Activation of 74Ge and 76Ge
| Autor: | Kudejova P., Jochum J., Jolie J., Meierhofer G., Canella L., Grabmayr P. |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | EPJ Web of Conferences, Vol 2, p 05002 (2010) |
| Druh dokumentu: | article |
| ISSN: | 20100205 2100-014X |
| DOI: | 10.1051/epjconf/20100205002 |
| Popis: | The upcoming GERDA and MAJORANA experiments will use germanium crystals, isotopically enriched in 76Ge to search for the neutrinoless double beta decay (0ν2β). The very long half-life of 0ν2β (> 1025 y for 76Ge) requires an extremely low background level. Neutrons induced by cosmic muons can be captured after thermalization by 74Ge or 76Ge, followed by β− -decay of 75Ge and 77Ge respectively. The prompt γ-cascade after neutron capture and the β-decay contribute to the total backround in these experiments. For a good estimation of the background the poorly known cross-sections for the 74Ge(n,γ)75,75mGe reactions were measured using targets, isotopically depleted in 76Ge. Furthermore the prompt γ-rays in 77Ge were measured with isotopically enriched germanium targets. The results of the latter measurement were combined with the results of a dedicated coincidence measurement to reconstruct the prompt γ-ray decay scheme. |
| Databáze: | Directory of Open Access Journals |
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