Measurement of natHF (α,X) cross sections from Eα = 29 to 45 MEV

다국어 초록 (Multilingual Abstract)

The excitation function of medical interest isotope 178W/178mTa is investigated via natHf(α,x)178W reaction. The method has been changed to minimize the recoil effect by using additional aluminum foils. While investigating the reaction of natHf(α,x)178W, the cross-section of many other isotopes have been measured.

국문 초록 (Abstract)

natHf(α,x)178W 반응을 통해 의료용 방사성동위원소 178W/178mTa 의 핵반응 단면적을 측정하였다. 알루미늄 포일을 이용하여 되툄현상을 최소화하는 방법을 사용하였다. natHf(α,x)178W 핵반응을 분석하면서 여러 동위원소의 핵반응 단면적을 측정하였다.

목차 (Table of Contents)

• Chapter 1. Introduction 1
• Chapter 2. Charged particle activation method 2
• 1. Nuclear cross section 2
• 2. Stacked foil activation method 4
• 3. Cross section formula 6
• A. Secondary particle problems 9
• B. Overlapping gamma line 10
• 4. Parameters and uncertainties. 11
• A. Total number of counts 11
• B. Number of atoms 12
• C. Detector efficiency 13
• D. Other parameters 14
• Chapter 3. Simulation 15
• 1. Determination of energies in the stacked-foil method 15
• A. PHITS 15
• B. TRIMS 17
• Chapter 4. Experimental method 23
• 1. Irradiation setup 23
• 2. Irradiation 23
• 3. Gamma spectrum acquisition. 24
• Chapter 5. Results 26
• 1. Monitoring reaction 26
• A. natTi(α,x)51Cr monitoring reaction 26
• B. 27Al(α,x)24Na monitoring reaction 27
• C. 27Al(α,x)22Na monitoring reaction 28
• 2. Production of W radio nuclides. 29
• A. Excitation function of natHf(α,xn)176W (T1/2 = 2.5 h) 29
• B. Excitation function of natHf(α,xn)177W (T1/2 = 132 min) 30
• C. Excitation function of natHf(α,xn)178W (T1/2 = 21.6 days) 31
• 3. Production of Ta radionuclides 31
• A. ExcitationfunctionofnatHf(α,pxn)173Ta(T1/2 =3.14h) 37
• B. Excitation function of natHf(α,pxn)175Ta (T1/2 = 10.5 h) 37
• C. Excitation function of natHf(α,pxn)176Ta (T1/2 = 8.09 h) 38
• D. Excitation function of natHf(α,pxn)177Ta (T1/2 = 56.56 h) 38
• E. Excitation function of natHf(α,pxn)178gTa (T1/2 = 2.36 h) 39
• F. Excitation function of natHf(α,pxn)180gTa (T1/2 = 8.154 h) 39
• G. Excitation function of natHf(α,pxn)182gTa (T1/2 = 114.74 d) 40
• H. Excitation function of natHf(α,pxn)183Ta (T1/2 = 5.1 d). 40
• 4. Production of Hf radionuclides 41
• A. Excitation function of natHf(α,2pxn)173Hf (T1/2 = 23.6 h) 41
• B. Excitation function of natHf(α,2pxn)175Hf (T1/2 = 70 d) 44
• C. Excitation function of natHf(α, 2pxn)179m2Hf (T1/2 = 25.05 d) 44
• D. Excitation function of natHf(α,2pxn)180mHf (T1/2 = 5.53 d) 44
• E. Excitation function of natHf(α,2pxn)181Hf (T1/2 = 42.39 h) 45
• Chapter 6. Conclusion 46
• Chapter A. Appendix 50
• 1. Figure 50
• 2. Table. 52
• 3. Collected measurement data 57
• A. Thickness 57
• B. Flux 57
• C. Efficiency 57
• 4. Spectrum data 60