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Half-value layers

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opus_two:
I looking for half-value, quarter-value, and tenth-value layers numbers for CS-137

For lead and Tungsten shelding

Thanks

Rennhack:
http://www.nukeworker.com/study/hp/rct/pdf/core_1-11.pdf

cincinnatinuke:
The numbers we use here at work are in HVL and we deal pretty exclusively with Cs-137 and some Co-60.  Our "cheat sheets" state HVL for lead is 0.25 in. and 0.16" for tungsten.  Using the given equations from Rennhack's link you can solve for QVL and TVL.  For QVL I got 0.5" for lead and 0.32" for Tungsten.  For TVL I got 1.25" for lead and 0.8" for tungsten.  Let me know if the math is wrong or if my assumptions on HVL were rounded since that could lead to a discrepancy. 

opus_two:
Thanks for the info!!

Its a start.. It is hard to find tables on the internet that give hvl, etc for various elements and energies

radgal:
Actually for Cs 137 the TVL for lead is .82 inches (2.1 cm) and fo Co 60 the TVL for lead is 1.57 in (4.0cm)

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