A new ultra low-level HPGe activity counting setup in the Felsenkeller shallow-underground laboratory

Abstract

A new ultra low-level counting setup has been installed in the shallow-underground laboratory Felsenkeller in Dresden, Germany. It includes a high-purity germanium detector (HPGe) of 163\% relative efficiency within passive and active shields. The passive shield consists of 45m rock overburden (140 meters water equivalent), 40 cm of low-activity concrete, and a lead and copper castle enclosed by an anti-radon box. The passive shielding alone is found to reduce the background rate to rates comparable to other shallow-underground laboratories. An additional active veto is given by five large plastic scintillation panels surrounding the setup. It further reduces the background rate by more than one order of magnitude down to 116$\pm$1 kg${}^{-1}$ d${}^{-1}$ in an energy interval of 40-2700 keV. This low background rate is unprecedented for shallow-underground laboratories and close to deep underground laboratories.

Submitted to Astroparticle Physics; corrected typo in abstract

References in corpus (10)

• Activation measurement of the 3He(alpha,gamma)7Be cross section at low energy
• Performance of the EDELWEISS-III experiment for direct dark matter searches
• LUNA: Status and Prospects
• The Future of Solar Neutrinos
• Neutron-induced background by an alpha-beam incident on a deuterium gas target and its implications for the study of the 2H(alpha,gamma)6Li reaction at LUNA
• The muon intensity in the Felsenkeller shallow underground laboratory
• Neutron flux and spectrum in the Dresden Felsenkeller underground facility studied by moderated ${}^3$He counters
• Measurement of the ${}^2$H($p,\gamma$)${}^3$He S-factor at 265-1094keV
• GeMSE: a Low-Background Facility for Gamma-Spectrometry at Moderate Rock Overburden
• The upgraded low-background germanium counting facility Gator for high-sensitivity $\gamma$-ray spectrometry

Cited by in corpus (3)

• Solar fusion III: New data and theory for hydrogen-burning stars
• The Felsenkeller shallow-underground laboratory for nuclear astrophysics
• Underground nuclear astrophysics: Status and recent results from Felsenkeller laboratory