1. 1

2. 2

3. Ar:CO2 – 80:20 3

4. E n =5.5 MeV, neutron flux=1.4x10 6 n/cm 2 s 4

5. Sparks Ar:CO2 – 80:20 E n =5.5 MeV, neutron flux=1.4x10 6 n/cm 2 s E n =5.5 MeV, neutron flux=0.7x10 5 n/cm 2 s 5

6. 6

7. 7

8. 8

9. 9

10. 10

11. Ar:CO2 – 93:7 11

12. E n =5.5 MeV, neutron flux=1.5x10 6 n/cm 2 s 12

13. Sparks Ar:CO2 – 93:7 13

14. 14

15. 15

16. 16

17. 17

18. 18

19. Ar:CO2 – 80:20 Ar:CO2 – 93:7 combined for high and low n-rate 19

20. 20

21. 21

22. 22

23. 23

24. 24

25. Energy Resolution Plot (source Fe55) 25

26. Plots from MCA w/ Fe source, doubleFit -Gauss (10/5/2010) 26

27. Resolution = FWHM/mean value = 2,35 sigma / mean value 27