Chemical Elements as Tracers of the Evolution of the Cosmos


Romanian Ultra-low Radiation Background Laboratory, Institutul National de Fizica si Inginerie Nucleara “Horia Hulubei” (Bucharest-Magurele, Romania)


The Romanian Ultra-low Radiation Background Laboratory (bicroBq) is operated by IFIN-HH, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (Bucharest-Magurele, Romania).

The 3 MV Tandetron used in conjunction with the microBq lab demonstrated sensitivity in the range of a hundred pbarn for direct methods applications in nuclear astrophysics.


microBq low-background radiation laboratory was constructed and fully commissioned in 2006 in the former Unirea (Slanic-Prahova) salt mine at 208 m below surface (estimated to 560 m water equivalent). Preliminary measurements showed a global reduction of the absorbed dose due to natural factors of about 39 times compared to level on the surface, reaching inside the mine 1.17±0.14 nGy/h. The total gamma background spectrum between 40 keV and 3 MeV was 4000 times smaller at laboratory level with respect to the same spectrum recorder at surface, in open field.


Linked ChETEC institution

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ChETEC contact persons

  • Livius Trache (
  • Mihai Straticiuc (