[1] Yablokov,Alexey.Nesterenko,Vassil. Chernobyl: consequences of the catastrophe for people and the environment. NewYork, Academy of Sciences, (2009). [2] Pilviö, Riitta. Method for the determination of low level actinide concentrations and their behavier in the aquatic enviroment. Helsinki, University of Helsinki, (1998). [4] Usuda, Shigekazu. Sakurai, Satoshi. Phoswich detector for simultaneous counting of α, β(γ)-rays and neutrons. Nuclear Instrument and Material in Physics Research A. 388 (1997) 193-198. [5] White, Travis. Miller, William. A triple crystal Phoswich detector with digital pulse shape discrimination for alpha/beta/gamma spectroscopy. Nuclear Instrument and Material in Physics Research A. 422 (1999) 144-147. [6] Childress, Nathan. Miller, William. MCNP analysis and optimization of a triple crystal Phoswich detector. Nuclear Instrument and Material in Physics Research A. 490 (2002) 263-270. [7] Ely, J.H. Aalseth, C.E. Novel beta-gamma coincidence measurements using phoswich detectors. Journal of Radioanalytical and Nuclear Chemistry. 263(1) (2005) 245-250. [8] Hennig, W. Tan,H. Single channel beta-gamma coincidence detection of radioactive xenon using digital pulse shape analysis of phoswich detector signals. IEEE Transactions on Nuclear Science, 53 (2006) 620. [9] Farsoni, A.T. Hamby, D.M. MCNP analysis of a multilayer phoswich detector for β-particle dosimetry and spectroscopy. Nuclear Instrument and Material in Physics Research A. 555 (2005) 225-230. [10] Farsoni, A.T. Hamby, D.M. A system for simultaneous beta and gamma spectroscopy. Nuclear Instrument and Material in Physics Research A. 578 (2007) 528-536. [11] Yamamoto, Seiichi. Hatazawa, Jun. Development of an alpha/beta/gamma detector for radiation monitoring. Review of Scientific Instruments. 82(11) (2011). [12] Ifergan, Y. Dadon, S. Development of a thin, double-sided alpha/beta detector for surface-contamination mearsurement. IEEE Transactions on Nuclear Science [13] Ifergan, Y. Dadon, S. utilization of wavelenght-shifting fibers coupled to ZnS(Ag) and plastic scintillator for simultaneous detection of alpha/beta particles. Nuclear Instrument and Material in Physics Research A, 784 (2015) 93-96. [14] T.G. BERTHOLD technicologies. [Online]. Available: https://www.berthold.com/en/rp/lb-124-scint-contamination-monitor. [15] Agostinelliae,S. Allisonas, K. Geant4-a simulation toolkit. Nuclear Instrument and Material in Physics Research A, 506 (2003) 250-303. [16] Knoll, G. Radiation detection and measurement. NewYork, Wiley, (2000). [17] SAINT-GOBLAIN. [Online]. Available :https://www.crystals.saint- gobain.com/products/radiation-detection