diff --git a/tardis/simulation/base.py b/tardis/simulation/base.py
index 92a658b80d7..5851afa18ab 100644
--- a/tardis/simulation/base.py
+++ b/tardis/simulation/base.py
@@ -428,7 +428,7 @@ def advance_state(self, emitted_luminosity):
 
         if "gamma" in self.plasma.outputs_dict:
             continuum_property_solver = MCContinuumPropertiesSolver(
-                self.atom_data
+                self.plasma.atomic_data
             )
             estimated_continuum_properties = continuum_property_solver.solve(
                 radfield_mc_estimators,
@@ -436,8 +436,8 @@ def advance_state(self, emitted_luminosity):
                 self.transport.transport_state.geometry_state.volume,
             )
             update_properties.update(
-                gamma=estimated_continuum_properties.photo_ion_coeff,
-                alpha_stim_coeff=estimated_continuum_properties.stim_recomb_estimator,
+                gamma=estimated_continuum_properties.photo_ionization_rate_coefficient,
+                alpha_stim_factor=estimated_continuum_properties.stimulated_recombination_rate_factor,
                 bf_heating_coeff_estimator=radfield_mc_estimators.bf_heating_estimator,
                 stim_recomb_cooling_coeff_estimator=radfield_mc_estimators.stim_recomb_cooling_estimator,
             )