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All currently used scaling models for Terrestrial Cosmogenic Nuclide (TCN) production rates are based on neutron monitor surveys (Lal, 1991; Stone, 2000; Dunai, 2000, 2001; Desilets and Zreda, 2003; Pigati and Lifton, 2004; Lifton et al., 2008).Therefore, an assumption underlying all cosmogenic nuclide studies is that production rates are directly proportional to secondary cosmic ray intensities for all cosmogenic nuclides.The pilot experiment was aborted after the neon and helium compositions of these two targets were found to be a mixture of cosmogenic and other components (Kober, 2004).There are two reasons why the first target design failed.We here present the first results of an artificial target experiment measuring, for the first time, cosmogenic Ne in quartz after one year of exposure at mountain altitudes in the Swiss Alps.Previous artificial target experiments have mainly focused on water (Lal et al., 1960; Nishiizumi et al., 1996; Graham et al., 2000; Brown et al., 2000), although one pilot experiment used a silicate glass (Graf et al., 1996). These were stainless steel containers with 14 cm radius and 45 cm height, filled with 4 kg of industrial quartz sand of natural origin (Fluka, no. The targets were heated to C under vacuum for a week in order to ensure complete degassing prior to exposure, and double sealed with a valve and copper tube clamp to prevent atmospheric leaks during exposure.Herein lies the complementary strength of artificial calibration targets.

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It is notoriously hard to find vertical transects of natural calibration sites that allow the calculation of production rate attenuation lengths.He samples, and lists a single sample (SI47) for example purposes.Using Excel or Openoffice you can add rows to this file using units given here.We used quartz as the target material, because it is the most commonly used mineral for exposure dating and both cosmogenic helium and neon are produced and retained in the target container. Fourteen of these targets were exposed at seven different locations for two to four years.Two of them were measured, one unexposed blank target and one target that had been exposed at Jungfraujoch, at an altitude of 3571 m.




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