The Scintillation efficiency of sodium and iodine recoils in a NaI(Tl) detector for dark matter searches

Spooner, N.J.C.; Davies, G.J.; Davies, J.D.; Pyle, G.J.; Bucknell, T.D.; Squier, G.T.A.; Lewin, J.D.; Smith, P.F.

doi:10.1016/0370-2693(94)90343-3

The Scintillation efficiency of sodium and iodine recoils in a NaI(Tl) detector for dark matter searches

N.J.C. Spooner
(
- Oxford U.
)
,
G.J. Davies
(
- Imperial Coll., London
)
,
J.D. Davies
(
- Birmingham U.
)
,
G.J. Pyle
(
- Birmingham U.
)
,
T.D. Bucknell
(
- Birmingham U.
)

1994

5 pages

Published in:

Phys.Lett.B 321 (1994) 156-160

DOI:

10.1016/0370-2693(94)90343-3

View in:

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Abstract: (Elsevier)

Searches for weakly interacting massive particles that may constitute the Galactic dark matter can be based on the detection of nuclear recoil events in NaI(Tl) scintillation detectors. For this purpose it is necessary to know the relative scintillation efficiency for nuclear recoil events. Presented here are the results of measurements of the efficiency for conversion of low energy I and Na nuclear recoil events into scintillation light in NaI(Tl). The experiments were performed using elastic scattering of monoenergetic neutrons of energy 3.2–5.5 MeV. The relative scintillation efficiency was found to be about 30% for Na recoils, down to 15 keV, and 8% for I recoils, down to 27 keV.

dark matter
nucleus: recoil
postulated particle: WIMP
n: elastic scattering
elastic scattering: n
scintillation counter: performance
scintillation counter: sodium-iodide
efficiency

References(29)

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