Surface exposure cosmogenic nuclide dating

Surface exposure cosmogenic nuclide dating

Cosmo Calc is an add-in to MS-Excel developed with the intention to alleviate this problem.The Cosmo Calc interface was designed to be as user friendly and easy-to-use as possible.The reader is strongly encouraged to try these other programs.

Although several efforts have been made to directly measure TCN production rate scaling with latitude and elevation using artificial H targets (Nishiizumi et al., 1996; Brown et al., 2000; Graham et al., 2007), all currently used scaling models are based on neutron monitor surveys.The scaling factors of Stone (2000) can be different for different nuclides, because the importance of muons depends on the nuclide of interest.Because most TCN production rate calibration sites are located at SLHL, it is crucially important to scale the production rates using the same method as the unknown sample.These production rates are only valid for the specific conditions (latitude, elevation, age) of each particular calibration site.To apply the TCN method to other field settings, the production rates must be scaled to a common reference at sea level and high latitude (SLHL).

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Lal’s scaling factors are elegant and easy to use, but overestimate the importance of muons and are only valid for standard atmosphere.

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