First run- Torbernite. A 150 second run was made to establish any self XRF from the uranium in the rock.
Then the exciter was turned on and the run stopped after 5 seconds. Already the metals had formed their patters, Cu Ka,b, U La,b, Potassium. After a minute phosphorus could be recognized, but as the test went on the 2 keV peak lost much of its distinction.
After about 30 seconds, the peaks were formed well enough that an identification could be made with high confidence. The run was continued for 150 seconds total so that it would be the same as many of our earlier tests with essentially this same setup.
All .mca files attached and can be viewed with free Amptek DPPMCA or ADMCA software.
Geo
