ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract CdWO4 bolometers were realized with the final purpose to study Double Beta Decay of116Cd. The test device we developed performs as a very efficient γ detector, with a preliminary resolution of aboout 5 keV FWHM. The detector background spectra are dominated at low energies by β decay of113Cd: the calorimetric measurement of this process allows to detrmine the end point (318.8±1.4±5 keV) and with unprecedented precision the life time ((9,3±0.5±1)×1015 y). Following the same approach, we have analysed the internal contamination in210Pb of three different types of lead used for shielding in low background experiments. Various lead bolometers were developed and operated, using common modern lead, special low activity modern lead and 2000 years old Roman lead. The presence of210Pb was clearly observed through the α decay of its daughter210Po in the modern samples, while only a limit was set for the much purer Roman lead. The purifying effect of crystallization was clearly demontrated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00693518
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