Hello Tim:

I shall be very grateful if you can review the following calculation for me.
It is based on the input received from you

3.2 pCi/L =1 TU = 2.09E7 atoms/L        (Am I right here?? How do you get
the atoms/L)

Now 3g Tritium = 6.023E23 atoms

So 1 atom of Tritium = (3/6.023E23) g

So 1TU = (2.09E7*3/6.023E23) g/L = 1.04E-16 g/L

Now 1 TU = 0.118 Bq/ L (from Clark & Fritz pp. 175)

so 1 TU = 1.04E-16 g/L = 0.118 Bq/L

Can we then say that


1.04E-16 g of Tritium = 0.118 Bq                ????

Even though Bq is a frequency unit (dps)it appears that it can be
equivalenced to mass of tritium.
 I have to convert TU into a mass unit for a contaminant transport
simulation and this is the way I found

But is this valid??

I shall be very grateful for your help

Regards

Bhaskar Joshi







:



-----Original Message-----
From: Timothy P. Rose [mailto:[log in to unmask]]
Sent: Tuesday, January 30, 2001 10:21 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] errata


Bhaskar,
You are correct that 1 TU = 3.2 pCi/L, not the other way around.  Sorry for
the misinformation.  I'll go a little slower before I hit the reply button
next time.
- Tim


*****************************************************************
Timothy P. Rose
Analytical and Nuclear Chemistry Division, L-231
Lawrence Livermore National Laboratory
Livermore, CA  94550
Phone: 925-422-6611
Fax: 925-422-3160
email: [log in to unmask]
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