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

被引：19

作者：

Farber, Daniel L. ^{[1
,2
]}

Meriaux, Anne-Sophie ^{[2
]}

Finkel, Robert C. ^{[3
]}

机构：

[1] Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2008年 / 274卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

attenuation length; cosmogenic radionuclide; 10Be; geochronology; Quaternary; Sierra Nevada;

D O I：

10.1016/j.epsl.2008.07.015

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We have measured the fast nucleon production of Be-10 to depths of 2.37 m (659 g/cm(2)) 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 degrees 14.7' N, 118 degrees 53.7' W and 2286 m. The data are well fit with a simple exponential decrease yielding an apparent attenuation length of Be-10 production of 177 + 4 (2 sigma) g/cm(2). The shallowest data point is from a depth of 1.24 cm (3.45 g/cm(2)) and shows no indication of a near-surface flattening of the radionuclide inventory and hence the Be-10 production rate. Published by Elsevier B.V.

引用

页码：295 / 300

页数：6

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