Bragg-like curve for dark matter searches; binary gases

Abstract

The directional detection of low-energy recoil ions can provide strong possibility for observation of dark matter in the Galaxy. Quenching factors for 5-200 keV recoil ions in N2, CO2, CF4 and CS2 gases are evaluated and Bragg-like curves, the electronic energy deposition as a function of the projected range, are presented. The Bragg-like curves are intended for directional search for the dark matter candidate, WIMPs, using the gas TPC. Quenching factors for very heavy ions produced in alpha-decay in dry air, N2, CO2, CF4 and CS2 are also estimated and compared with experimental values.

Submitted to Rad. Phys. Chem., 18 pages, 9 figures

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• First measurement of nuclear recoil head-tail sense in a fiducialised WIMP dark matter detector
• Long-term study of backgrounds in the DRIFT-II directional dark matter experiment
• Simulations of the Nuclear Recoil Head-Tail Signature in Gases Relevant to Directional Dark Matter Searches
• Ionisation quenching factors from W-values in pure gases for rare event searches
• First background-free limit from a directional dark matter experiment: results from a fully fiducialised DRIFT detector
• Measurement of directional range components of nuclear recoil tracks in a fiducialised dark matter detector
• Spin-Dependent Limits from the DRIFT-IId Directional Dark Matter Detector
• Model for bubble nucleation efficiency of low-energy nuclear recoils in bubble chambers for dark matter detection