weaee ee i em a a eee ~ ante son ext etlaOR ti Naate athi CONTENTS : 1.1 1.2 1.3 Objectives ~ "7 "= es tt - Background = "eee tt tr tte ee Theory ss ee ee ee cect ree www me eee 5 é wo 8 4 ‘ $ § t § t t INTROWCTION- - ~ mee met et ee 4 AESTRACT «© © eo we ee ew wee we ew we a FOSERORD «= «© = ew ew nn were we eee we a CHAFVER 1 fe ll OF” 10 1.3.1 Initial-Gamia Redlatica - <= ce tee ee ee ee = 10 1.3.3 1.3.4 absorption in dir ~ 7 tt te ete ee te 7-7 iydrodmente Effect ~ = - tee es “ses eee 1.3.2 Pesidusl-Gacma Ridation= ss ee ee ee ee = 10 2.1 2.2 ~« = ee swe wwe ene we we mre wean Ingstmeuntations ~ st et et tt tem UL 2.1.2 LL 2e1.1 2.2.3 Low-Sensitivity Systane - ee ee er tr er eee High-Sensitivity Systea ~ se ce hm ee tee eee Smetel Detector Systems ~ et tt ws ere rem Calibrations - cw ee te tt tt te ewe ee ee eee 2eQel HightIntansity Calibrations --e- - see ee ees OL i 15 ' 16 16 2.2.2 Lowintensity Calibration = - 7 eet et tee ee 18 3-1 3.2 Total Lyper rt tre ee 25 25 3.2.2 Speciil Dntectar Syston tee ttt ee ee ee RT wa ree 4 CHUTER . wma AvEesOTX SOMAUATONS a wa we wo www een ene mew wane ew CONCIUGIONS wm A perso Ape ees TEEGRY OF WiStRurahT CPs QatioN = 2 ee ee ee ee te . : i 18 18 Ganarale - = te tt ~ rere wre tee ee Belek Shot dere ene te eer rer ree veer QY 3ebe2 Shot 2e err re tte cert ees meen A 3.1.3 Shot Bert tr te ttt tt tt tt 2.4 Shot hoe er rst tee tte rt ee te ees 25 Data Gorimiatiecn se ett te teeters 3.20. Intesratad Pxpecurm Pets Yareus ‘ %S t : 5 ' CHAPTER 3 RESULTS AND DISCUSSION= - + > - eet - t 2.2.3 Enersy Dependenca ~ 7 7 7 tt tee eee Shot Perticipstion ~ so tt et ttt tet te § 2.3 ‘ . PROCELURE E CHAPIZER 2 a 24 2 30 i