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--- gamma_screening [2008/05/01 13:50] – prisca
+++ gamma_screening [2009/12/22 15:52] (current) – old revision restored ben
@@ Line 2: / Line 2: @@
 Questions to be answered:
-  * range of sensitivities
+* range of sensitivities
+    i.	Common materials screening: ~10-11 g/g for 40K, 232Th, 238U.
+    ii.	Very low background: ~10-12 g/g for 40K, 232Th, 238U.
+    iii.Ultra-low background in electroforming copper: ~10-13g/g  for 232Th, 238U.
   * # detectors
+    i.	10 gamma-ray stations for common materials screening.
+    ii.	4 gamma-ray stations for very low background materials.
+    iii.2 gamma-ray stations for ultra-low background counting.
   * distribution by depth
+    i.	300-ft or 800-ft levels for common materials screening.
+    ii.	4850-ft for very low-background and ultra-low background counting.
   * staffing and expertise
+    i.	Two staff numbers are needed for operating the facility.
+    ii.	Expertise:  Much expertise can be called from different institutions.
 Software: Reyco Henning