Study on the radon adsorption capability of low-background activated carbon

TL;DR

This study identifies a new low-background activated carbon with significantly enhanced radon adsorption capacity, suitable for use in rare event detection experiments to reduce background noise.

Contribution

It introduces a novel low-background activated carbon with optimized pore size, demonstrating superior radon adsorption compared to existing materials.

Findings

Radon adsorption capacity is 2.6 to 4.7 times higher than Saratech or Carboact.

Optimized pore size of 2.3 nm enhances adsorption performance.

New activated carbon effectively reduces background in sensitive experiments.

Abstract

Radon is a significant background source in rare event detection experiments. Activated Carbon (AC) adsorption is widely used for effective radon removal. The selection of AC considers its adsorption capacity and radioactive background. In this study, using self-developed devices, we screened and identified a new kind of low-background AC from Qingdao Inaf Technology Company that has very high Radon adsorption capacity. By adjusting the average pore size to 2.3 nm, this AC demonstrates a radon adsorption capacity of 2.6 or 4.7 times higher than Saratech or Carboact activated carbon under the same conditions.