Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-07-22
Phys.Lett.B571:132-138,2003
Astronomy and Astrophysics
Astrophysics
12 pages, 6 figures, to be published in Physics Letters B
Scientific paper
10.1016/j.physletb.2003.07.077
It is known that scintillation efficiency of organic single crystals depends on the direction of nuclear recoils relative to crystallographic axes. This property could be applied to the directional WIMP dark matter detector. The scintillation efficiency of carbon recoils in a stilbene crystal was measured for recoil energies of 30 keV to 1 MeV using neutrons from $^7$Li(p,n)$^7$Be and $^{252}$Cf. Anisotropic response was confirmed in low energy regions. The variation of the scintillation efficiency was about 7 %, that could detect the possible dark matter signal.
Inoue Yasunori
Minowa Makoto
Sekiya Hiroyuki
Shimizu Yasuaki
Suganuma W.
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