A low background ionisation chamber for alpha-spectroscopy
The goal of designing a low background ionisation chamber is to measure long lived α-decay half-lives which might interfere with rare event searches. Such decays play a part in many fields in nuclear physics and are difficult to measure. A lot of Geiger-Nutall studies also depend on them. Among othe...
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Sprache: | eng |
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Zusammenfassung: | The goal of designing a low background ionisation chamber is to measure long lived α-decay half-lives which might interfere with rare event searches. Such decays play a part in many fields in nuclear physics and are difficult to measure. A lot of Geiger-Nutall studies also depend on them. Among others the research is specifically aimed at the precision measurements of α emitters mainly within the Lanthanide region. The excellent energy resolution would also allow to search for excited states in α-decays. To achieve this goal a gridded ionisation chamber was constructed using the Frisch-Grid design. A background rate of only 10.9(6) counts per day has been achieved in the energy region of 1 MeV to 9 MeV and improvements are possible. This low background rate and size of the chamber allows precision measurements of long living alpha decays with half-lives in the region of 1 × 1015 years. |
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ISSN: | 2100-014X 2101-6275 2100-014X |
DOI: | 10.1051/epjconf/201714610015 |