First experimental determination of the ${}^{40}$Ar($n,2n$)${}^{39}$Ar reaction cross section and ${}^{39}$Ar production in Earth's atmosphere

S. Bhattacharya, M. Paul, R. N. Sahoo +28

The cosmogenic ${}^{39}$Ar(t${}_{1/2}$= 268 years) isotope of argon is used for geophysical dating and tracing owing to its appropriate half-life and chemical inertness as a noble gas;…