Test material

Concentration ratio (C_out/C_in)

Reaction probability γ

Stainless steel (SUS304)

0.86

2.64 × 10⁻⁶

Floor material (resin)

0.78

8.25 × 10⁻⁶

Pyrex glass

0.88

1.72 × 10⁻⁶

Plywood

0.45

1.26 × 10⁻⁴

Wall material (resin)

0.82

5.13 × 10⁻⁶