The Performance of Thin NaI(Tl) Scintillator Plate for Dark Matter Search

Abstract

A thin (0.05cm) and wide area (5cm×5cm) NaI(Tl) scintillator was developed. The performance of the thin NaI(Tl) plate, energy resolution, single photoelectron energy and position sensitivity were tested. An excellent energy resolution of 20% (FWHM) at 60keV was obtained. The single photoelectron energy was calculated to be approximately 0.42±0.02keV.Position information in the 5cm×5cm area of the detector was also obtained by analyzing the ratio of the number of photons collected at opposite ends of the detector. The position resolution was obtained to be 1cm (FWHM) in the 5cm×5cm area.

Optical, scintillation and radiation tolerance properties of Pr-doped pyrosilicate crystals

“…No scintillators available today can fulfill all the requirements so a continuous effort has been paid to develop new scintillator materials in many material forms including single crystals, ceramics, and glasses. [11][12][13][14][15][16][17][18][19][20][21][22] Among scintillators developed up to now, rare earth ions commonly play an important role as a luminescence center, and the most common luminescence centers are Ce 3+ , 14) Pr 3+ , 22) and Eu 2+ 16) for scintillators since they show a high light yield and a short decay time due to the 5d-4f transitions. 23) Among these rare earth ions, Pr 3+ has attracted much interest since it shows a fast scintillation decay around 10-20 ns [24][25][26] with an efficient light yield.…”

PICO-LON project for WIMPs search

“…The gamma rays from the sources, 241 Am, 133 Ba and 57 Co were irradiated without any collimator. The typical energy resolution (FWHM) was obtained as small as 18% at 60keV [2].…”

WIMPs SEARCH BY EXCLUSIVE MEASUREMENTS WITH THIN MULTILAYER NaI(Tl) SCINTILLATORS (PICO-LON)

“…Position determination analysis was performed using 60keV gamma rays from 241 Am. The position resolution was calculated to be approximately 1cm in FWHM [12].…”