The Performance of the Thin NaI(Tl) Detector Pico-Lon for Dark Matter   Search
  Thin and large area NaI(Tl) scintillator to search for WIMPs dark matter was developed. The performance of thin and wide area NaI(Tl) showed good enough to search for dark matter. The energy threshold was as low as 2keV and the energy resolution was about 24% in FWHM at 60keV. 
K. Harada, K. Fushimi, S. Nakayama, R. Orito, S. Iida, S. Ito, H.   Ejiri, T. Shima, R. Hazama, E. Matsumoto, H. Ito and K. ...
physics.ins-det astro-ph.IM nucl-ex