diff --git a/src/main.py b/src/main.py
index 56538fa..1aab0a5 100644
--- a/src/main.py
+++ b/src/main.py
@@ -514,17 +514,35 @@ def build_nexus_file(pld_fabrication, output_path, rheed_osc=None):
             nx_rheed = nx_pld_entry.create_group("rheed_data")
             nx_rheed.attrs["NX_class"] = "NXdata"
 
-            nx_rheed.create_dataset("time", data=rheed_osc["time"])
-            nx_rheed["time"].attrs["units"] = "s"
+            # Asse temporale
+            t_ds = nx_rheed.create_dataset("time", data=rheed_osc["time"])
+            t_ds.attrs["units"] = "s"
+            t_ds.attrs["long_name"] = "Time"
 
-            nx_rheed.create_dataset("intensity", data=rheed_osc["intensity"])
-            #nx_rheed["intensity"].attrs["units"] = "counts"
-            nx_rheed["intensity"].attrs["long_name"] = "RHEED intensity"
+            # Intensità: shape (n_layers, n_timepoints, 3)
+            i_ds = nx_rheed.create_dataset("intensity", data=rheed_osc["intensity"])
+            i_ds.attrs["units"] = "a.u."
+            i_ds.attrs["long_name"] = "RHEED Intensity"
+
+            # Attributi NXdata — notazione NeXus 3.x corretta
             nx_rheed.attrs["signal"] = "intensity"
-            nx_rheed.attrs["axes"] = "layer:time:channel"
-            nx_rheed.attrs["layer_indices"] = [0]  # asse layer
-            nx_rheed.attrs["time_indices"] = [1]   # asse tempo
-            nx_rheed.attrs["channel_indices"] = [2]
+            nx_rheed.attrs["axes"] = [".", "time", "."]   # solo l'asse 1 (time) è denominato
+            nx_rheed.attrs["time_indices"] = np.array([1], dtype=np.int32)
+            # ###########
+            # nx_rheed = nx_pld_entry.create_group("rheed_data")
+            # nx_rheed.attrs["NX_class"] = "NXdata"
+
+            # nx_rheed.create_dataset("time", data=rheed_osc["time"])
+            # nx_rheed["time"].attrs["units"] = "s"
+
+            # nx_rheed.create_dataset("intensity", data=rheed_osc["intensity"])
+            # #nx_rheed["intensity"].attrs["units"] = "counts"
+            # nx_rheed["intensity"].attrs["long_name"] = "RHEED intensity"
+            # nx_rheed.attrs["signal"] = "intensity"
+            # nx_rheed.attrs["axes"] = "layer:time:channel"
+            # nx_rheed.attrs["layer_indices"] = [0]  # asse layer
+            # nx_rheed.attrs["time_indices"] = [1]   # asse tempo
+            # nx_rheed.attrs["channel_indices"] = [2]
     return
 
 if __name__=="__main__":