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.
Standard deviation of fluence rate as a function of fluence rate. The symbols were measured data obtained from eight measurements of the same point source. The solid line is a linear fit. The measured data for ϕ > 600 mW cm−2 were excluded from the fit.
