Effective attenuation lengths of cosmic rays producing ¹⁰Be and ²⁶Al in quartz: Implications for exposure age dating Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/jd473197k

Descriptions

Attribute NameValues
Alternative Title
  • Effective attenuation lengths of cosmic rays producing 10Be and 26Al in quartz: Implications for exposure age dating
Creator
Abstract or Summary
  • We have measured cosmic ray produced ¹⁰Be (t₁/₂ = 1.5 My) and ²⁶Al (t₁/₂ = 0.72 My) as functions of depth in a core of quartz sandstone bedrock collected in South Victoria Land, Antarctica. These data were used to place limits on the exposure age and erosion rate of the exposed surface, and to calculate the effective attenuation lengths of cosmic rays producing these nuclides. These latter results indicate that the production attenuation length for ²⁶Al (156⁺¹³₋₁₂ g cm⁻²) is comparable to that ¹⁰Be (145⁺⁸₋₆ g cm⁻²). This suggests that the production ratio ²⁶Al:¹⁰Be does not vary substantially with depth in a rock, and that its value at the surface of exposed rock is not strongly affected by erosional losses, allowing wider use of the ratio in determining exposure ages.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Brown, E. T., E. J. Brook, G. M. Raisbeck, F. Yiou, and M. D. Kurz (1992), Effective attenuation lengths of cosmic rays producing ¹⁰Be and ²⁶Al in quartz: Implications for exposure age dating, Geophysical Research Letters, 19(4), 369–372, doi:10.1029/92GL00266.
Series
Rights Statement
Related Items
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • This is the publisher’s final pdf.
  • description.provenance : Made available in DSpace on 2012-02-04T01:04:53Z (GMT). No. of bitstreams: 1BrookEdwardCEOASEffectiveAttenuationLengths.pdf: 405257 bytes, checksum: 8b42df705c596f1a6c6346ee995b7688 (MD5) Previous issue date: 1992
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-02-04T01:04:53ZNo. of bitstreams: 1BrookEdwardCEOASEffectiveAttenuationLengths.pdf: 405257 bytes, checksum: 8b42df705c596f1a6c6346ee995b7688 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items