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+#ifndef SNO_H
+#define SNO_H
+
+/* Density of heavy water at 10 degrees Celsius.
+ *
+ * From Tsing-Lien Chang. "Density of Heavy Water." Nature. May 7, 1949. */
+#define HEAVY_WATER_DENSITY 1.10595
+
+/* Density of regular water at 10 degrees Celsius.
+ *
+ * From Tsing-Lien Chang. "Density of Heavy Water." Nature. May 7, 1949. */
+#define WATER_DENSITY 0.99973
+
+/* Radius of the AV in mm. */
+#define AV_RADIUS_INNER 6005.0
+#define AV_RADIUS_OUTER 6060.0
+#define AV_RADIUS 6032.5
+
+#endif