Since 1998, there have been improvements in the capability to detect atmospheric
radioxenon in the International Monitoring System operated by the Preparatory Commission …

Abstract Pacific Northwest National Laboratory reports on the detection of 39 Ar at the
location of an underground nuclear explosion on the Nevada Nuclear Security Site. The …

The Xcounts algorithm for calculating air concentrations of radioactive xenon isotopes
(Eslinger et al., 2023) has been extended to estimate 127 Xe in addition to 131m Xe, 133m …

A suite of measurement systems were deployed as part of the Physical Experiment 1 series
of experiments, which involved detonating chemical explosives along with radionuclide …

Underground nuclear explosions release noble gases into the atmosphere that can be
detected to support international monitoring efforts. Atmospheric transport models help …

A new system for the implementation of the 4πβ (plastic scintillator)–4πγ coincidence
counting technique was developed and tested by measuring the activity of a 60Co solution …

Abstract The Comprehensive Nuclear-Test-Ban Treaty (CTBT) prohibits the testing of
nuclear weapons on the face of the earth. The detection of atmospheric radioxenon …

A radiotracer gas with a blend of 37 Ar and 127 Xe was created for a gas migration
experiment and was characterized at Pacific Northwest National Laboratory using ultra-low …

The Comprehensive Nuclear-Test-Ban Treaty was opened for signature in 1996 and seeks
to ban nuclear weapons testing worldwide. The International Monitoring System (IMS) was …

The atmospheric detection of four radioxenon isotopes (131mXe, 133mXe, 133Xe, and
135Xe) released during a nuclear detonation is a key tool utilized by the Comprehensive …