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Unique Signature of Dark Matter in Ancient Mica | | Daniel P. Snowden-Ifft
; Andrew J. Westphal
; | | Date: |
28 Dec 1996 | | Journal: | Phys.Rev.Lett. 78 (1997) 1628-1631 | | Subject: | astro-ph | | Affiliation: | Amherst College) and Andrew J. Westphal (U. C. Berkeley | | Abstract: | Mica can store (for >1 Gy) etchable tracks caused by atoms recoiling from WIMPs. Because a background from fission neutrons will eventually limit this technique, a unique signature for WIMPs in ancient mica is needed. Our motion around the center of the Galaxy causes WIMPs, unlike neutrons, to enter the mica from a preferred direction on the sky. Mica is a directional detector and despite the complex rotations that natural mica crystals make with respect to this WIMP ``wind,’’ there is a substantial dependence of etch pit density on present day mica orientation. | | Source: | arXiv, astro-ph/9701215 | | Services: | Forum | Review | PDF | Favorites | |
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