CsI(Tl)晶体中反冲Cs和I核QuenchingFactor的测量.pdf

Ú26í Ú8Ú ß Ü ï í ë Ë ï í vd.26, No.8 2002ê 8Â Ä GH ENERGY PE¼SItB AND NIJCIZAR PHYSICS Aug. , ª Ô2 M easur ement of Q uenchi ng Fact or f or Nuclear Recoills in CsI ( T I ) Crystal ¯ YIJE QianleO U Jin1 111J Yan1 U Hao--BiE12¤3 WONG H . T .2 WONAG M . Z .3 I ( Inm utt d H i gh Eneq w phy, i¸ , Cð , Beij i ng 10Þ 39 ) 2 ( I nst itut e d ph ysi cs - A cad eÉÀa sm ica , T a pei 11529 ) 3 ( Depart ment d phy a c, , Tai wan Univem ty , Tai pei 106Þ ) A bgÜ s ct Deteem n d dar k Em mer using Cd ( × ) , cin6na ing cry stal Ä the detector has Á thered m m and more intere sts . h this paper , the quenching factor d nuclear ree£iIs i nduced by inc ident neuï n beam was measured based on p uh e Shape Discd mination ( PSD ) method to identif y events of nucl ear recoils h m bac kg ª und - It is shown that É e quend i ng ¤ etor inc reases wi É the decreased recoil energy in the range of 7 keV Ø 132 14eV . IEis result shows the F eat advantage of CsI ( Ê ) cry -taI detector m de- tect ing of dE k matter - K ey w ozÊ S CsI ( ´ ) c® , ± , zm zm n elasti c scattering , dark matteh pulse shape dim m m m on 1 I n t r o d u c U o n Ò 1e EYE am m ore an d mo m i nt e rest s f or