探测器自身放射性本底CslPowderMeasurements20Processingwater+18pure water801670Processing water1460(50Pure wateronly1241030Ultrapure water020Pure waterUltra-PureWater610d0n2oPOAh h645655660640650665670675680E(kev)650655660665670675E(keV)CsI crystalCsI Powder
探测器自身放射性本底 CsI Powder CsI crystal
脉冲形状甄别PSD.1. Nuclear recoilDY241013410100234561Time(μs)S, =a,t,[1-e(-/t)+a,t,(-t / t2)12
( ) ( ) 1 2 / 2 2 / 1 1 1 1 t t t a e a e − − = − + − 脉冲形状甄别 PSD
Pulse Shape Discrimination10nNuclearrecoil10图5.2.3一个实制题别增形，采用电者比投法。左国是题别增，此图计靠出的优员因子POM一2.210.52011.52.53MeanTimeofCsl(Tl:0.071mole%)1.8.Nuclear recoil1.6e口V1.4ZAt,1.2Z40.80.6356789410Emes(keV)
Pulse Shape Discrimination = i i i A At t 图 5.2.3 一个实测甄别谱形，采用电荷比较法。 左图是甄别谱，此图计算出的优质因子 FOM＝2.21
Quenching factor (ionization yield >energy)MARLOWE_Cs_TI0.05mol%calculation02oM.Z.Wanget.al.S.Pecourtot.al0.22EeeKiMSdatatorTI0.073moleR0.2EthKiMSdatatorTI0.12BmoleDRKIMSdataforTI0.426mole0.180.160.140.120.1MARLOWENaTI0.1mo1%0.08MARLOWE1TI0.1mo1%8.45Na_Nal(TI)Chaganiet.al.0.06Na_Nal(Tl) Tovey et. alI Nal(TI) Tovey et.al.bu602040801001201400.4105Na_Nal(TI) Gerbier et. al.Recoil Energy (keV)NaNal(Tl)Spooneret.al0.35I Nal(Tl) Spooner et. al.nd0.30.250.20.150.0.0510015020050RecoilEnergy(keV)
Quenching factor (ionization yield →energy) t h R ee R E output e e output R R E e R R E E L L L L = = = − − −
Neutron detectorsShadow barHydrogen gas targetNeutrdnbeamPulsed 7Li beamHPGe detector