diff --git a/openmc/mgxs_library.py b/openmc/mgxs_library.py
index c8eafd4a13..c2a4a9db71 100644
--- a/openmc/mgxs_library.py
+++ b/openmc/mgxs_library.py
@@ -349,6 +349,18 @@ class XSdata:
     def chi_delayed(self):
         return self._chi_delayed
 
+    @property
+    def beta(self):
+        return self._beta
+
+    @property
+    def decay_rate(self):
+        return self._decay_rate
+
+    @property
+    def inverse_velocity(self):
+        return self._inverse_velocity
+
     @property
     def num_orders(self):
         if self._order is None: