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Journal of Glaciology

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Abstract/ Summary

A gamma-ray density gauge can provide high-resolution and high-precision density measurements of firn and ice cores. This study describes the design, gamma-ray energy optimization and mass attenuation coefficient calibration of the Maine Automated Density Gauge Experiment (MADGE), a portable, field-operable gamma-ray density gauge used on overland traverses in East Antarctica. The MADGE instrument uses a (241)Am gamma-ray source, a pulse-mode counting system and electronic core diameter calipers to collect high-precision (+/- 0.004 g cm(-3)) density data from 3-8 cm diameter firn and ice cores. The data are collected at a 3.3 mm spatial resolution and an average throughput of 1.5 m h(-1) for 5 cm diameter cores.

Citation/Publisher Attribution

Breton, DJ, Hamilton, GS, and Hess, CT, 2009, Design, Optimization and Calibration of an Automated Density Gauge for Firn and Ice Cores: Journal of Glaciology, v. 55, p. 1092-1100. Available on publisher's site at:

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© Copyright 2009 by the International Glaciological Society


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In Copyright - Educational Use Permitted.