목차

1. 서론 ··········································································································1
2. 이론적 배경 ····························································································3
2.1. 감마선과 물질과의 상호작용 ·······················································3
2.1.1. 광전 흡수 ·················································································4
2.1.2. 컴프톤 산란 ·············································································5
2.1.3. 전자쌍생성 ···············································································7
2.2. 자체감쇠 보정 ·················································································8
2.2.1. 감쇠계수 ···················································································8
2.2.2. 광자의 감쇠 보정 ·································································10
3. CT방법을 이용한 환경시료 중 질량감쇠계수 결정 ····················13
3.1. 시료의 선정 및 특징 ··································································13
3.2. 시료 전처리 ··················································································14
3.3. 측정 방법 ······················································································18
3.3.1. 표준선원 ·················································································18
3.3.2. 계측기 선정 및 시스템 구성 ·············································19
3.3.3. 계측 ·························································································21
3.4. 결과 ································································································22
4. CT방법을 이용한 질량감쇠계수 산출 및 자체감쇠계수 보정 ··33
4.1. 시료 선정 및 특징 ······································································33
4.2. 시료 전처리 ··················································································35
4.2.1. 질량감쇠계수 산출을 위한 시료의 전처리 ·····················35
4.2.2. 방사능평가 목적의 시료 전처리 ·······································36
4.3. 측정 방법 ······················································································39
4.3.1. 질량감쇠계수의 산출 ···························································39
4.3.2. 자체감쇠 보정인자의 산출 ·················································40
4.4. 결과 ································································································41
4.4.1. 질량감쇠계수 산출결과 ·······················································41
4.4.2. 보정인자 산출결과 ·······························································42
4.4.3. IAEA RM 시료 분석결과 ··················································44
5. 결론 ········································································································53
6. 참고 문헌 ······························································································55