ABSTRACT ..........................

ABSTRACT .............................................................................................................. iii
DEDICATION .......................................................................................................... v
ACKNOWLEDGEMENTS ...................................................................................... vi
NOMENCLATURE.................................................................................................. vii
TABLE OF CONTENTS .......................................................................................... viii
LIST OF FIGURES................................................................................................... x
LIST OF TABLES .................................................................................................... xii
CHAPTER
I INTRODUCTION................................................................................ 1
II THEORY.............................................................................................. 6
PGNAA fundamentals.................................................................... 6
Neutron sources for PGNAA ......................................................... 10
Gamma-ray detection ..................................................................... 15
Quantitative analysis ...................................................................... 20
Absolute methods........................................................................... 21
Relative and internal standardization methods............................... 24
III EXPERIMENTATION AND PREDICTIVE MODEL....................... 26
Preliminary beam characterization................................................. 28
Neutron fluence rate measurements ............................................... 29
PGNAA experimental set-up ......................................................... 34
Neutron beam collimation.............................................................. 35
Beam stop....................................................................................... 38
Detection system and acquisition electronics................................. 39
Determination of sample position ................................................. 42
Energy and efficiency calibrations................................................. 46
Shielding considerations ................................................................ 47

Kết quả (Việt) 1:

ABSTRACT .............................................................................................................. iiiDEDICATION .......................................................................................................... vACKNOWLEDGEMENTS ...................................................................................... viNOMENCLATURE.................................................................................................. viiTABLE OF CONTENTS .......................................................................................... viiiLIST OF FIGURES................................................................................................... xLIST OF TABLES .................................................................................................... xiiCHƯƠNG I INTRODUCTION................................................................................ 1 II THEORY.............................................................................................. 6 PGNAA fundamentals.................................................................... 6 Neutron nguồn cho PGNAA... 10 Gamma-ray detection ..................................................................... 15 Phân tích định lượng... 20 Absolute methods........................................................................... 21 Relative and internal standardization methods............................... 24 III EXPERIMENTATION AND PREDICTIVE MODEL....................... 26 Preliminary beam characterization................................................. 28 Neutron fluence rate measurements ............................................... 29 PGNAA experimental set-up ......................................................... 34 Neutron beam collimation.............................................................. 35 Beam stop....................................................................................... 38 Detection system and acquisition electronics................................. 39 Determination of sample position ................................................. 42 Energy and efficiency calibrations................................................. 46 Shielding considerations ................................................................ 47