研究生: |
黃宣雅 Huang, Syuan-Ya |
---|---|
論文名稱: |
清華大學水池式反應器W3中子束粉末繞射儀及去極化中子儀之探討 Study of neutron diffraction beamline and neutron depolarization beamline at W3 port in the Tsing-Hua Open Pool Reactor |
指導教授: | 李志浩 |
口試委員: |
蘇暉家
蔣安忠 |
學位類別: |
碩士 Master |
系所名稱: |
原子科學院 - 核子工程與科學研究所 Nuclear Engineering and Science |
論文出版年: | 2012 |
畢業學年度: | 100 |
語文別: | 中文 |
論文頁數: | 102 |
中文關鍵詞: | 中子粉末繞射 、中子磁散射 、去極化中子 |
外文關鍵詞: | neutron powder diffraction, magnetic neutron scattering, neutron depolarization |
相關次數: | 點閱:1 下載:0 |
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本論文的主旨為探討清華水池式反應器W3實驗站之中子粉末繞射儀的數據解析度與磁散射及核散射之偵測極限,以及觀察變溫及變磁場對於中子粉末繞射強度的影響,藉此研究小型中子源在粉末繞射實驗上的研究極限。由Ni(111)之中子粉末繞射實驗結果顯示,目前最佳數據解析度可達1度。並且以Ni(111)中子粉末繞射強度為參考做初步評估,大多數的元素皆符合偵測極限,表示即使是在低功率反應器(2 MW)上,可以從事之中子粉末繞射研究主題亦相當廣泛。變溫及變磁場之中子粉末繞射實驗主要由Y3Fe5O12(420)繞射峰及Fe3O4(111)繞射峰呈現,實驗顯示Y3Fe5O12(420)繞射峰之磁散射強度約為總散射強度之18%,而Fe3O4(111)繞射峰則為58%,皆與理論值接近。另外本論文亦整理了目前去極化中子儀之設備及原理,並記錄了去極化中子儀之現況。
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