Standard value (nm)

Peaks obtained (nm)

Valley energy values ratio

279.5

279.46, 279.78, 280.10

14.9/78.2 = 0.190

279.5

279.46, 279.79, 280.12

15.0/78.0 = 0.192

279.5

279.47, 279.75, 280.08

15.0/78.0 = 0.192

Average

0.191