Limits on Dark Matter Using Ancient Mica

Details Limits on Dark Matter Using Ancient Mica Limits on Dark Matter Using Ancient Mica

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrvl..74.4133s&link_type=abstract

Physical Review Letters, Volume 74, Issue 21, May 22, 1995, pp.4133-4136

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17

Scientific paper

The combination of the track etching method and atomic force microscopy allows us to search for weakly interacting massive particles (WIMPs) in our Galaxy. A survey of 80 720 μm2 of 0.5 Gyr old muscovite mica found no evidence of WIMP-recoil tracks. This enables us to set limits on WIMPs which are about an order of magnitude weaker than the best spin-dependent WIMP limits. Unlike other detectors, however, the mica method is, at present, not background limited. We argue that a background may not appear until we have pushed our current limits down by several orders of magnitude.

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