TaS2-HDPE複合材料におけるGeant4を用いた第一原理放射線遮蔽性能シミュレーション

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Updated: Jan 14, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

S Alsalmi¹, R A B Alraddadi²

¹Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, P.O. Box 2455, 11451, Saudi Arabia. salsalmi@ksu.edu.sa.

Scientific reports

|January 12, 2026

Abstract:

High atomic number (Z) fillers in polymer matrices provide lightweight alternatives to conventional radiation shielding. Previous studies have examined fillers such as CdO, [Formula: see text], and [Formula: see text]. However, no prior work has investigated tantalum disulfide ([Formula: see text]) in polymer composites for gamma-ray shielding, leaving a clear gap in the literature. Here, we report the photon attenuation performance of high-density polyethylene (HDPE) composites containing 10-50 wt% [Formula: see text] over 0.06-2.0 MeV, evaluated by Geant4 Monte Carlo simulations and validated with XCOM data. At 80 keV, where enhancement is most pronounced, the 50 wt% composite achieved a mass attenuation coefficient of 2.88 ± 0.04 [Formula: see text]/g, corresponding to a 15.9 ± 0.21 improvement over pure HDPE. Composites with 35, 20, and 10 wt% [Formula: see text] showed enhancements of 11.55 ± 0.05, 7.07 ± 0.03, and 4.04 ± 0.02 times, respectively. Benchmarking against micro-CdO-HDPE confirmed competitive or superior attenuation across the photon spectrum. These results establish TaS₂-HDPE as a tunable, non-toxic, and effective candidate for next-generation radiation shielding applications.

キーワード:

ガンマ線遮蔽 Geant4シミュレーション質量減衰係数モンテカルロ法

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Radiation: Applications

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...