diff --git a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 8.md b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 8.md
index 95a55c1b8..1be2af8cd 100644
--- a/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 8.md	
+++ b/300s School/NUCE 2113 - Radiation Detection and Measurement/Laboratory 8.md	
@@ -15,3 +15,7 @@ calibrating
 th small peak 3496 4620keV
 th large peak 3549 4687keV
 cm peak at 4398 5804keV /5762keV
+
+Exercise 8.5a
+fwhm 16.35
+energy is 5481.