half thickness

Thickness of absorbing material necessary to reduce by one-half the intensity of radiation which passes through it. 1/3/73

Epaisseur d'un matériau absorbant qui est nécessaire pour réduire de moitié l'intensité d'une radiation le traversant. 1/3/73

Any given absorber that will reduce the intensity of an original beam of ionizing radiation to one-half of its initial value.

B: (Fisika) tebal-paruh
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