Fig. 2.
In situ gamma-ray spectra at locations: (a) 1, 2, 3 and 4 (b) 5, 6, 7 and 8. The characteristic gamma-ray emitters are marked above the corresponding peaks
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.