diff --git a/src/scgenerator/spectra.py b/src/scgenerator/spectra.py
index 82a26d6..7be6999 100644
--- a/src/scgenerator/spectra.py
+++ b/src/scgenerator/spectra.py
@@ -125,8 +125,7 @@ class Spectrum(np.ndarray):
 
     @property
     def center_of_gravity(self):
-        intensity = self.time_int
-        return np.sum(intensity * self.t) / np.sum(intensity)
+        return pulse.center_of_gravity(self.t, self.time_int)
 
     def mask_wl(self, pos: float, width: float) -> Spectrum:
         """