CHAPTER 1.FUNDAMENTAL CONCEPTS OF NEUTRON PHYSICS 1
1-1 The neutron 1
1-2 Properties of the neutron 2
1-3 Cross sections as nuclear area 5
1-4 Quantum mechanical analysis of neutron cross sections 7
1-5 Compound state in nuclear reactions 10
1-6 Cross sections at high energy 13
1-7 Neutron resonances 14
1-8 Principles of cross-section measurements 17
1-9 Neutron activation 21
1-10 Moderation of fast neutrons 24
1-11 Neutron diffusion 30
CHAPTER 2.THE PILE AS A NEUTRON SOURCE 35
2-1 Fission 35
2-2 Pile reproduction factor, k 40
2-3 Critical size 45
2-4 Pile reactivity 49
2-5 Types of piles 53
2-6 Distribution of fast neutrons in pile 58
2-7 Resonance neutrons 61
2-8 Thermal neutrons 66
CHAPTER 3.NEUTRON STANDARDIZATION 72
3-1 Source strength 72
3-2 Absolute neutron flux 79
3-3 Relative flux 84
3-4 Neutron temperature 89
CHAPTER 4.FAST NEUTRON RESEARCH 93
4-1 Threshold reactions in fission neutron flux 93
4-2 Measurement of threshold reactios inside pile 98
4-3 Use of fast neutrons for solid state studies 102
4-4 Fission source in thermal beam 106
4-5 Measurement of fast neutron capture cross sections 109
4-6 Use of H2（H3,n）He4 reaction 117
4-7 Photoneutron sources 120
4-8 Neutron age measurements 123
CHAPTER 5.RESONANCE NEUTRONS IN THE PILE 129
5-1 Resonance integral by activation 129
5-2 Resonance absorption integral 134
5-3 Effective resonance integral 138
5-4 Filter methods 143
CHAPTER 6.RESONANCE NEUTRON BEAMS 147
6-1 Resonance detectors 148
6-2 Resonance scatterers 152
6-3 Filtered beams 156
6-4 Crystal monochromator 159
6-5 Mechanical velocity selector （fast chopper） 165
6-6 Analysis of neutron resonances 171
CHAPTER 7.THERMAL NEUTRONS INSIDE THE PILE 179
7-1 Activation by Maxwell velocity distribution 179
7-2 Measurement of activation cross sections 182
7-3 Production of radioisotopes 188
7-4 Activation analysis 195
7-5 Absorption cross sectionsDanger coefficient method 196
7-6 Absorption cross sections Pile oscillator 201
7-7 Mass spectrometric methods 206
CHAPTER 8.NEUTRON DIFFUSION MEASUREMENTS 211
8-1 Use of diffusion for measurement of small capture cross sections 211
8-2 The “sigma pile” 214
8-3 Use of thermal column as source for diffusion experiments 218
8-4 Measurement of diffusion length in beryllium 219
8-5 Exponential experiments 224
CHAPTER 9.THERMAL NEUTRON BEAMS 227
9-1 Production of thermal neutron beams 227
9-2 Cross-section measurements with Maxwell velocity distribution 235
9-3 Filters 239
9-4 Mechanical velocity selectors （“choppers”） 243
9-5 Chopper measurements with cold neutrons 249
9-6 Mechanical unonochromators 254
CHAPTER 10.NEUTRON DIFFRACTION 258
10-1 Coherence and incoherence of neutron scattering 258
10-2 Calculation of coherent and incoherent cross sections 262
10-3 Methods of neutron diffraction 266
10-4 Neutron transmission in polycrystals 269
10-5 Powder diffraction method 272
10-6 Applications of neutron diffraction 280
CHAPTER 11.NEUTRON REFRACTION, PEFLECTION, AND POLARIZATION 287
11-1 Small-angle scattering 287
11-2 Neutron mirrors 292
11-3 Determination of coherent amplitudes with mirrors 295
11-4 Refiection from magnetic mirrors 301
11-5 Balancing techniques in mirror reflection 306
11-6 Measurement of coherent neutron-proton scattering by liquid mirrors 309
11-7 Measurement of neutron-electron interaction by reflection 316
11-8 Neutron polarization 319
11-9 Production of polarized neutrons by reflection and diffraction 321
CHAPTER 12.HEALTH PHYSICS 328
12-1 Effects of radiation on tissue 328
12-2 Units and limits of radiation exposure 330
12-3 Measurement of radiation for personnel protection 334
12-4 Radiation protection for pile experiments 338
APPENDIX 1.CONSTANTS, CONVERSION FACTORS, AND FORMULAS 343
APPENDIX 2.ATOMIC MASSES 347
APPENDIX 3.THERMAL CROSS SECTIONS 349
APPENDIX 4.A SET OF EXPERIMENTS FOR A PILE PHYSICS COURSE 367
SYMBOL INDEX 376
INDEX 379