Working characteristics of the New Low-Background Laboratory (DULB-4900,   Baksan Neutrino Observatory)
  A concise technical characteristic of a new low-background laboratory DULB-4900 of the BNO INR RAS is presented. The technique and the results of background measurements in the Hall, ordinary box and low-background box are presented. Rn-222 contamination in the laboratory air has been measured by direct detection of gamma-radiation of its daughter Bi-214 distributed over the volume of the low-background box. The results of the data analysis are presented. 
Ju.M. Gavriljuk, A.M. Gangapshev, A.M. Gezhaev, V.V. Kazalov,   V.V.Kuzminov, S.I. Panasenko, S.S. Ratkevich, S.P. Yakimenko
physics.ins-det