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Forum: Event and Track Management
Re: Question How to calculate Kerma in air? (Sun Liang)
Re: More Re: How to calculate Kerma in air?
Date: 30 Aug, 2015
From: Patrik Eschle <Patrik Eschle>

This is not correct. KERMA is not the same as dose. The values approach for thick absorbers (~1 cm for 1 MeV).

KERMA contains all the energy that is transferred to secondaries, including those particles that escape the volume. Dose cumulates the energy deposit in the volume only.

So to measure KERMA

- get the dose from a "thick" absorber (depends on energy) or

- add the kinetic energy of all electrons generated by a primary photon at the point of their generation.

Cheers,

  Patrik

(patrik.eschle@zhaw.ch)

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