ASTM E2971-16

1.1 This test method is intended for quantitative determination of effective boron-10 (¹⁰B) areal density (mass per area of ¹⁰B, usually measured in grams-¹⁰B/cm² ) in aluminum neutron absorbers. The attenuation of a thermal neutron beam transmitted through an aluminum neutron absorber is compared to attenuation values for calibration standards allowing determination of the effective ¹⁰B areal density. This test is typically performed in a laboratory setting. This method is valid only under the following conditions:

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.