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Attenuation length for fast nucleon production of 10Be derived from near surface production profiles

Lookup NU author(s): Dr Anne-Sophie Meriaux

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Abstract

We have measured the fast nucleon production of 10Be to depths of 2.37 m (659 g/cm2) in a granodiorite core of uniform density and composition from the Mt. Givens pluton on the western side of the Sierra Nevada, California, at 37° 14.7′ N, 118° 53.7′ W and 2286 m. The data are well fit with a simple exponential decrease yielding an apparent attenuation length of 10Be production of 177 + 4 (±2σ) g/cm2. The shallowest data point is from a depth of 1.24 cm (3.45 g/cm2) and shows no indication of a near-surface flattening of the radionuclide inventory and hence the 10Be production rate.

Publication metadata

Author(s): Farber DL, Mériaux A-S, Finkel RC

Publication type: Article

Publication status: Published

Journal: Earth and Planetary Science Letters

Year: 2008

Volume: 274

Issue: 3-4

Pages: 295-300

ISSN (print): 0012-821X

ISSN (electronic): 1385-013X

URL: http://dx.doi.org/10.1016/j.epsl.2008.07.015

DOI: 10.1016/j.epsl.2008.07.015

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