diff --git a/hexsample/app.py b/hexsample/app.py
index 307d9c98..12b1c1ba 100644
--- a/hexsample/app.py
+++ b/hexsample/app.py
@@ -188,6 +188,10 @@ def add_source_options(self) -> None:
         """Add an option group for the source properties.
         """
         group = self.add_argument_group('source', 'X-ray source properties')
+        types = ['lines', 'continuum']
+        group.add_argument('--spectrumtype', type=str, choices=types, default='lines',
+                           help='type of spectrum, choices are between a discrete\
+                           and a continuum spectrum in the range [7000, 9000] eV.')
         group.add_argument('--srcelement', type=str, default='Cu',
             help='element generating the line forest')
         group.add_argument('--srclevel', type=str, default='K',
diff --git a/hexsample/bin/hxsim.py b/hexsample/bin/hxsim.py
index 8326af71..2fc5675a 100755
--- a/hexsample/bin/hxsim.py
+++ b/hexsample/bin/hxsim.py
@@ -35,7 +35,7 @@
 from hexsample.hexagon import HexagonalLayout
 from hexsample.mc import PhotonList
 from hexsample.roi import Padding
-from hexsample.source import LineForest, GaussianBeam, Source
+from hexsample.source import ContinuumSpectrum, LineForest, GaussianBeam, Source
 from hexsample.sensor import Material, Sensor
 
 
@@ -58,7 +58,11 @@ def hxsim(**kwargs):
     """
     # pylint: disable=too-many-locals, invalid-name
     rng.initialize(seed=kwargs['seed'])
-    spectrum = LineForest(kwargs['srcelement'], kwargs['srclevel'])
+    spectrum_type = kwargs['spectrumtype']
+    if spectrum_type == 'continuum':
+        spectrum = ContinuumSpectrum()
+    else:
+        spectrum = LineForest(kwargs['srcelement'], kwargs['srclevel'])
     beam = GaussianBeam(kwargs['srcposx'], kwargs['srcposy'], kwargs['srcsigma'])
     source = Source(spectrum, beam)
     material = Material(kwargs['actmedium'], kwargs['fano'])
diff --git a/hexsample/fileio.py b/hexsample/fileio.py
index 74daa489..a2f27f8d 100644
--- a/hexsample/fileio.py
+++ b/hexsample/fileio.py
@@ -262,6 +262,7 @@ def _fill_recon_row(row: tables.tableextension.Row, event: ReconEvent) -> None:
     row['trigger_id'] = event.trigger_id
     row['timestamp'] = event.timestamp
     row['livetime'] = event.livetime
+    # Roi size is not implemented in all event type classes
     #row['roi_size'] = event.roi_size
     row['cluster_size'] = event.cluster.size()
     row['energy'] = event.energy()
diff --git a/hexsample/source.py b/hexsample/source.py
index 8cacc21c..1f7e158b 100644
--- a/hexsample/source.py
+++ b/hexsample/source.py
@@ -205,8 +205,6 @@ def plot(self) -> None:
         """
         raise NotImplementedError
 
-
-
 class LineForest(SpectrumBase):
 
     """Class describing a set of X-ray emission lines for a given element and
@@ -269,8 +267,47 @@ def __str__(self):
         """String formatting.
         """
         return f'{self.line_dict}'
+    
+class ContinuumSpectrum(SpectrumBase):
+    """Class describing a continuum and uniform x-ray energy spectrum between
+    a minimum and a maximum value. By now the continuum spectrum is set in the
+    range [7000, 9000] eV, the possibility to choose it in the sim has to be
+    implemented.
 
+    Arguments
+    ---------
+    min_energy : float
+        Minimum energy of the spectrum
+    max_energy : float
+        Maximum energy of the spectrum
+    """
+    def __init__(self, min_energy: float=7000, max_energy: float=9000) -> None:
+        self.minimum_energy = min_energy
+        self.maximum_energy = max_energy
 
+    def rvs(self, size: int  = 1) -> np.ndarray:
+        """Throw random energies from the line forest.
+
+        Arguments
+        ---------
+        size : int
+            The number of X-ray energies to be generated.
+
+        Returns
+        -------
+        energy : np.ndarray of shape ``size``
+            The photon energies in eV.
+        """
+        # Random generating the energies in [minimum_energy, maximum_energy]
+        return rng.generator.uniform(self.minimum_energy, self.maximum_energy, size)
+    
+    def plot(self) -> None:
+        """Plot the continuum spectrum for 1e4 generated photons.
+        """
+        # pylint: disable=invalid-name
+        energies_ = self.rvs(10000)
+        plt.hist(energies_, density=True, color='tab:blue')
+        setup_gca(xlabel='Energy [eV]', ylabel='PDF', logy=True, grids=True)
 
 class Source: