EPJ Web Conf.
Volume 146, 2017ND 2016: International Conference on Nuclear Data for Science and Technology
|Number of page(s)||4|
|Section||Nuclear Masses, Structure and Decay Data Measurements|
|Published online||13 September 2017|
A low background ionisation chamber for alpha-spectroscopy
1 Institut für Kern- und Teilchenphysik, TU-Dresden, Dresden, Germany
2 Helmholtz Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
a e-mail: email@example.com
Published online: 13 September 2017
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.
© The Authors, published by EDP Sciences, 2017
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