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Re-evaluation of the W value for electrons in dry air

M Boutillon and A M Perroche-Roux

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In 1979 ICRU recommended the value W=(33.85+or-0.05) eV for the average energy required for electrons to produce an ion pair in dry air. A re-evaluation is presented which is based on recently published stopping-power data. The new result is W/e=(33.97+or-0.05) JC-1, where all stated uncertainties are estimated standard deviations.


PACS

87.56.Da Ancillary equipment

02.70.Rr General statistical methods

02.70.Uu Applications of Monte Carlo methods

Subjects

Computational physics

Medical physics

Dates

Issue 2 (February 1987)



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