The Dual Imaging Cerenkov Experiment (DICE) and the Elemental Composition in the ``Knee'' Region

Details The Dual Imaging Cerenkov Experiment (DICE) and the Elemental Composition in the ``Knee'' Region The Dual Imaging Cerenkov Experiment (DICE) and the Elemental Composition in the ``Knee'' Region

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998nuphs..60..124b&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 60, Issue 3, p. 124-129.

Physics

Nuclear Physics

4

Scientific paper

An outstanding problem in cosmic ray physics is the cosmic ray elemental abundance in the ``knee'' region of the charged particle spectrum. The Dual Imaging Cerenkov Experiment (DICE) is designed to measure the mean elemental mass and energy spectrum around the ``knee'' energy by using composition sensitive properties of Extensive Air Showers (EAS). We present preliminary results on one EAS parameter, the average depth of shower maximum, . We also show evidence for a change in the cosmic ray spectral index, a result which is in qualitative agreement with other experiments. A small increase in is present at the onset of the ``knee'', implying an increase in the relative number of lighter elements. Further consistency tests of these results which are in progress are described.

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