Special Techniques

 

Stella hpge detectors web

 

Activities and support provided by Special Techniques Service

  • development of detection techniques for ultra-low levels of radioactivity and rare nuclear processes;

  • material selection for the experiments installed in the underground laboratories to guarantee the least amount of intrinsic radioactivity;

  • measurement of samples of scientific interest (e.g. meteorites, crystals);

  • measurement of natural radioactivity in environmental samples and building and construction materials;

  • Radon monitoring with active radon detectors.

The measurement techniques employed are gamma-ray spectroscopy with several high purity Germanium detectors, alpha spectroscopy with silicon PIPS detectors, and alpha/beta spectroscopy with liquid scintillation counters.

Since 2006 the laboratory is participating regularly to national international intercomparison exercises organized by accredited institutions (e.g. ENEA, IAEA).

Below are given three of the most recent works, to which the Service contributed and that have been published in international scientific journals.

E. Bellotti et al., «Search for time modulations in the decay rate of K-40 and Th-232», Astroparticle Physics, Vol. 61, pp 82-87 (2015);

P.P. Povinec et al., «Cosmogenic radionuclides and mineralogical properties of the Chelyabinsk (LL5) meteorite: What do we learn about the meteoroid», Meteoritics and Planetary Science, Vol. 50 (2), pp 273-286 (2015);

P. Belli et al., «Search for double beta decay of Ce-136 and Ce-138 with HPGe gamma detector», Nuclear Physics A, Vol. 930, pp 195-208 (2014).

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