Surface Sputtering from Cold Dark Matter Interactions: Proposed Search for its Diurnal Modulation

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Compressed PostScript, 27 pages, 8 figures included (Astropart. Phys., in press)

Scientific paper

10.1016/0927-6505(94)00023-V

Nuclear recoil cascades induced by Cold Dark Matter (CDM) elastic scattering can produce the ejection of target atoms from solid surfaces. We calculate the yield and energy distribution of these sputtered atoms in a variety of materials. These parameters would suffer a large diurnal modulation induced by the rotation of the Earth and its motion through the galactic halo. Schemes for the detection of this unique CDM signature are proposed.

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