Title of article
Measurements of extremely low radioactivity levels in stainless steel for GERDA
Author/Authors
Maneschg، نويسنده , , W. and Laubenstein، نويسنده , , M. and Budj??، نويسنده , , D. and Hampel، نويسنده , , W. and Heusser، نويسنده , , G. and Kn?pfle، نويسنده , , K.T. and Schwingenheuer، نويسنده , , B. and Simgen، نويسنده , , H.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
6
From page
448
To page
453
Abstract
The radioisotope concentrations in stainless steel for the cryostat of the GERDA experiment at the Laboratori Nazionali del Gran Sasso (LNGS) have been measured. A total of 13 different stainless steel batches have been screened by low-level γ -ray spectrometry with germanium detectors located at two underground laboratories. The article reports the discovery of commonly available stainless steel with very low concentrations of primordial and cosmogenic radionuclides. The concentrations are in the range of 1 mBq/kg and below. Only the manmade 60Co-isotope is present in all samples with a higher concentration of around 19 mBq/kg. Further, deviations from secular equilibrium in the natural decay chains of U and Th have been observed in some cases.
Keywords
gamma spectroscopy , Double beta decay , Low-radioactivity , Stainless steel
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2008
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2210096
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