10-12 April 2013
INFN - Laboratori Nazionali del Gran Sasso
Europe/Rome timezone

Short-lived Rn-222 daughters in cryogenic liquids

12 Apr 2013, 10:35
20m
E. Fermi auditorium (INFN - Laboratori Nazionali del Gran Sasso)

E. Fermi auditorium

INFN - Laboratori Nazionali del Gran Sasso

SS 17 bis, km 18 + 910, 67100 Assergi (AQ), Italy
oral presentation Low background purification and growth techniques for liquids and solids Session 7: Low background purification and growth techniques for liquids and solids

Speaker

Mr Krzysztof Pelczar (Institute of Physics, Jagiellonian University)

Description

Presently cryogenic liquids are extensively used in experiments looking for rare nuclear events at low energies, for which the main issue is reduction of background. One of its most important sources may be intrinsic radioactive impurities of the cryogenic gas. A method to investigate properties of the short-lived Rn-222 daughters present in liquid nitrogen will be presented. Since they are produced as positive ions they can move in electric filed created by the detector itself (e.g. in TPCs). Drift of radioactive ions may lead to their inhomogeneous distribution in the detector's active volume and thus influence the expected background signal. Measurements of the ionic life-time and mobilities will be discussed.

Primary author

Mr Krzysztof Pelczar (Institute of Physics, Jagiellonian University)

Presentation Materials

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