[ RadSafe ] Linear attenuation coefficient for biological ashes

Cary Renquist cary.renquist at ezag.com
Thu Aug 26 20:10:18 CDT 2010

If you just need a rough composition, then do a search for synthetic
biological ash....
A quick search turned up a 1975 paper that gives the following for soft
tissue ash.
 (I assume mass percent)
67% KH2PO4 25% NaCl, 3.6% MgO, 3.0% CaCO3 and 1.4 % Fe2O3

You can then use the NIST xcom interface (or download the xcom program):
NIST XCOM: Element/Compound/Mixture 

Select the mixture radio-button and hit the submit-info button.

You can then enter the compound info and select your energy range/etc.

Good luck,

Cary Renquist
cary.renquist at ezag.com

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Lidia Silva
Sent: Thursday, 26 August 2010 04:00
To: 'radsafe at health.phys.iit.edu'
Subject: [ RadSafe ] Linear attenuation coefficient for biological ashes

Dear all,

I am looking for the linear attenuation coefficient of X-rays in ashes.
I checked the NIST database
http://physics.nist.gov/PhysRefData/XrayMassCoef/tab4.html , but there
is no such material included.

Does anyone have a suggestion of where to find data for biological


Lidia Silva
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