Author/Authors :
Weisshaar، نويسنده , , D. and Wallace، نويسنده , , M.S. and Adrich، نويسنده , , P. and Bazin، نويسنده , , D. and Campbell، نويسنده , , C.M. and Cook، نويسنده , , J.M. and Ettenauer، نويسنده , , S. and Gade، نويسنده , , A. and Glasmacher، نويسنده , , T. and McDaniel، نويسنده , , S. and Obertelli، نويسنده , , A. and Ratkiewicz، نويسنده , , A. and Rogers، نويسنده , , A.M. and Siwek، نويسنده , , K. and Tornga، نويسنده , , S.R.، نويسنده ,
Abstract :
The scintillator material LaBr3:Ce, which was discovered in 2001, has grown in popularity for a variety of applications in homeland security and nuclear medicine. In this paper we investigate its use for nuclear science spectroscopy applications in the context of in-beam gamma-ray spectroscopy with fast ion beams. In such experiments, the Doppler broadening of the gamma-ray line measured with a finite-size detector in the laboratory fundamentally limits the achievable energy resolution. For a typical experiment this effect is of the order of 3%. With the intrinsic energy resolution of LaBr3:Ce better than 3% FWHM at 662 keV, and its favorable stopping power, it could be a nearly ideal scintillator for gamma-ray spectroscopy applications with fast beams. Results from in-beam gamma-ray spectroscopy measurements using two LaBr3:Ce scintillators are presented and compared to results from segmented germanium detectors. Results from these measurements suggest that LaBr3:Ce based scintillation arrays can provide a viable tool for many experiments. Additionally, we show that the excellent timing properties of LaBr3:Ce can significantly reduce background events in the gamma-ray spectra.
