CAJ | 학술논문

加速器质谱( accelerator mass spectrometry, AMS)是基于加速器和离子探测器的一种高能质谱,属于一种同位素质谱( mass spectroscopy, MS),它克服了传统MS存在的分子本底和同量异位素本底干扰,因此同位素丰度灵敏度很高,对14 C( T1/2=5730 a)、10 Be( T1/2=1．5×106 a)和36 Cl( T1/2=3．0×105 a)等核素测量的丰度灵敏度均达10-15(传统MS的同位素丰度灵敏度最高为10-8).因此, AMS具有极其广泛的应用前景.简述AMS原理、技术和发展现状,介绍中国原子能科学研究院的AMS技术,及该技术在核科学与技术中的应用研究进展,包括长寿命核素半衰期的测量(如79 Se ),核反应微小截面的测量(如238U(n,3n)236U),长寿命谷区裂变产物核测量以及129I的AMS测量作为核设施监测、核环境与核应急检测的新方法等.
가속기질보( accelerator mass spectrometry, AMS)시기우가속기화리자탐측기적일충고능질보,속우일충동위소질보( mass spectroscopy, MS),타극복료전통MS존재적분자본저화동량이위소본저간우,인차동위소봉도령민도흔고,대14 C( T1/2=5730 a)、10 Be( T1/2=1．5×106 a)화36 Cl( T1/2=3．0×105 a)등핵소측량적봉도령민도균체10-15(전통MS적동위소봉도령민도최고위10-8).인차, AMS구유겁기엄범적응용전경.간술AMS원리、기술화발전현상,개소중국원자능과학연구원적AMS기술,급해기술재핵과학여기술중적응용연구진전,포괄장수명핵소반쇠기적측량(여79 Se ),핵반응미소절면적측량(여238U(n,3n)236U),장수명곡구렬변산물핵측량이급129I적AMS측량작위핵설시감측、핵배경여핵응급검측적신방법등.
Belonging to the category of isotope mass spectrometry ( MS) , accelerator mass spectrometry ( AMS) is a high-energy mass spectrometry based on accelerators and ion detectors. AMS overcomes the molecular and isobaric background interferences extant in conventional MS, and therefore has an extremely high isotopic abundance sensitivity, which reaches 10 -15 ( isotopic abundance sensitivity of conventional MS is 10 -8 at highest) for measure-ment of nuclides such as 14 C( T1/2 =5 730 a) , 10 Be( T1/2 =1. 5 × 106 a) and 36 Cl( T1/2 =3. 0 × 105 a) . Accordingly, AMS has extremely broad application prospects. This paper introduces the principle, technique and development sta-tus of AMS and focuses on the introduction of CIAE’s AMS technique and research advances in its application in nu-clear science and technology, such as studies on measurements of the half-life of long-lived nuclides(79Se), small nuclear reaction cross sections(238U(n,3n)236U) and long-lived fission product nucleus in valley areas, as well as AMS measurements of 129I as the new approach for nuclear facility monitoring, nuclear environment and emergency detection.