Re: Ambient dose equivalent H(10) (ICRU 39)

[Fernando Mireles-Garcia <fmireles@cantera.reduaz.mx>]

Dear Mike

Greetings for you and your family. When you plane to travel, you are welcome to
Zacatecas, Mexico. It has 453 years of  history as city. Also, there are some
Archeological places and others cultural places to visit. Say hello to Yvonne
Ellington.

Best Regard

Fernando Mireles-Garcia

Michael McNaughton wrote:

> Dear RadSafers
>
> Could anyone help me to understand the physical basis for Figure 3 in ICRU39.
> This is the conversion of exposure (roentgen) to ambient dose equivalent
> (cSv).
> Why is it not equal to the ratio of the mass attenuation coefficients for
> tissue and air? For example, near 80 keV, Figure 3 shows about 1.7, whereas
> the ratio of the mass attenuation coefficients is about 1.1. What is the
> physical basis used to obtain Figure 3?
>
> Thank you, mike
>
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