NASA NTRS · 19850034201
Al-26 depth profile in Apollo 15 drill core
Abstract
Accelerator mass spectrometry is used in a study of galactic cosmic ray production profiles based on cosmic ray-produced Al-26 in the Apollo 15 long core. The results, which are in general agreement with earlier nondestructive counting data, are of significantly higher precision, yet systematically lower. The half-attenuation length for Al-26 production is presently calculated to be 122 g/sq cm, after normalizing the data to average chemical composition.
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Nishiizumi, K., Arnold, J. R., Klein, J., Middleton, R.. 1984-10-01. Al-26 depth profile in Apollo 15 drill core. https://ntrs.nasa.gov/citations/19850034201
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