RE: Mache-unit

["Ing. A. Klerk" <boudewijn.klerk@tip.nl>]

June,
Very old-fashioned, one used the Stat (St) and the Mache-Unit for
alpha-sources, Radium-emanation in special.
Here are the definitions:

1 Stat is the amount of emanation that will give a saturation current of
3.33x10^-10 A (is about one electrostatic unit). So 1 Stat = 3.64x10^-7
Curie

To give the concentration of natural radioactivity in water or air one used
the Mache-unit:

1 Mache-unit = millistat emanation / liter = 3,64x 10^-10 Ci/liter water or
air.

I hope this is accurate enough.

Best regards, Boudewijn.

Best regards from,
 Arie (Boudewijn) Klerk
 Radiation health physics supervisor at Dutch MOD
 Radiation health physics teacher at Hogeschool Haarlem
 Address: Perenlaan 10, 3723 VJ Bilthoven, Netherlands
 tel. +31 30 2288633 (home), fax. +31 346 217848 (work)
 cellular: +31 653 970159,  email: boudewijn.klerk@tip.nl
 ICQ# 3441072
            <<< RADIATION: it is hardly a danger, but merely a risk ...  >>>

> -----Original Message-----
> From: radsafe@romulus.ehs.uiuc.edu
> [mailto:radsafe@romulus.ehs.uiuc.edu]On Behalf Of
> June_L._Scott@FirstEnergyCorp.com
> Sent: woensdag 19 augustus 1998 20:26
> To: Multiple recipients of list
> Subject:
>
> One of our dosimetry personnel just returned from a vacation in
> Greece.  In
> a magazine from Greece is an article about IKARIA's Healing Mineral
> Springs.  It has a list of nine springs and the radon activity in Mache
> units.  I was not successful in defining what a Mache unit is, or how it
> relates to something we would be familiar with.  The range of
> radioactivity
> values is between 9 and 754.  Any ideas on how or what this might
> correlate
> to?
>
>
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