Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 99: Detektorsysteme IV

T 99.2: Talk

Thursday, March 3, 2016, 17:00–17:15, VMP8 SR 205

The Dortmund Low Background Facility — Current Status and Recent Developments — Claus Gößling, Kevin Kröninger, and •Christian Nitsch — Experimentelle Physik IV, TU Dortmund, 44221 Dortmund

The Dortmund Low Background Facility (DLB) is a low-background gamma ray spectrometry system with an artificial overburden. The overburden of ten meters of water equivalent, in combination with a multi-layer lead castle and an active muon veto are shielding a high-purity germanium detector of 60 % relative efficiency. The background level is remarkably low compared to a conventional spectrometer system without special shielding and enables sensitivities well below 1 Bq/kg. Thus, material screening measurements as well as environmental monitoring measurements are possible on an easy-accessible location above ground at the campus of the Technische Universität Dortmund. The integral background count rate between 40 keV and 2700 keV is 2.528±0.004  counts/kg/min, which is comparable to systems that are situated below ground.

In the talk, an overview of the current status of the DLB is given and recent developments are presented.