A detailed investigation on highly dense CuZr bulk metallic glasses for shielding purposes

초록

Gamma-ray shielding properties of eight different metallic glasses based on CuxZr100-x: x = 35 (Cu35Zr65) - 70 (Cu70Zr30) were determined using Monte Carlo simulations and Phy-X/PSD software. A typical gamma-ray transmission setup has been modeled in MCNPX Monte Carlo code. The general trend of the linear attenuation coefficients (mu) was reported as (mu)(Cu35Zr65) < (mu)(Cu40Zr60) < (mu)(Cu45Zr55) < (mu)(Cu50Zr50) < (mu)(Cu55Zr45) < (mu)(Cu60Zr40) < (mu)(Cu65Zr35) < (mu)(Cu70Zr30). In terms of half value layer (HVL) values, the Cu35Zr65 sample has the highest value (2.984 cm) and the Cu70Zr30 sample has the lowest value (2.769 cm) at 8 MeV photon energy. The mean free path (MFP) values were 4.305 and 3.995 cm for Cu35Zr65 and Cu70Zr30 samples, respectively. Generally, MFP and HVL values of the studied glasses were reported as (MFP,HVL)(Cu35Zr65) > (MFP,HVL)(Cu40Zr60) > (MFP,HVL)(Cu45Zr55 )> (MFP,HVL)(Cu50Zr50) > (MFP,HVL)(Cu55Zr45) > (MFP,HVL)(Cu60Zr40) > (MFP,HVL)(Cu65Zr35) > (MFP,HVL)(Cu70Zr30) for all photon energy range. The Cu70Zr30 sample showed maximum values of both the effective conductivity (C-eff) and effective electron density (N-eff). In addition, the Cu70Zr30 sample has minimum exposure and energy absorption buildup factor (EBF and EABF) values at all studied gamma-ray energies. The results revealed that the Cu70Zr30 sample has superior attenuation properties among all studied samples.

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