Monte Carlo simulations of low-energy cosmogenic neutron fluxes near the bottom of cliff faces
Abstract
Cosmogenic radionuclide analysis for determining exposure ages and erosion rates is becoming more extensively utilized. Due to the complexity of the neutron absorption production avenue, the interpretation of Cl-36 data is a complex problem, particularly for non-trivial landform geometries. This work provides a numerical, Monte Carlo simulation analysis of variations in in situ cosmogenic Cl-36 production rate near the bottom of vertical cliffs. It is found that in comparison with production at height (more than a thermal neutron mean free path length in air) the production rate in the cliff face increases with decreasing height, but within a thermal neutron mean free path length in rock near the bottom of the cliff, the production rate exhibits a sharp decrease. (C) 2002 Elsevier Science B.V. All rights reserved.
Published in:
Earth and Planetary Science Letters 206,1-2 (2003) 43-49;
Link to original published article:
http://dx.doi.org/10.1016/S0012-821X(02)01079-8
Keywords
cosmogenic nuclides;; dating;; production rates;; neutron absorption;; monte carlo simulations;; rates;; cl-36;; nuclides;; erosion;; surfaces;; depth;; al-26;; be-10
Date of Version
January 2003
Recommended Citation
Dunne, J. A. and Elmore, D., "Monte Carlo simulations of low-energy cosmogenic neutron fluxes near the bottom of cliff faces" (2003). Department of Physics and Astronomy Faculty Publications. Paper 390.
https://docs.lib.purdue.edu/physics_articles/390