CAJ | 학술논문

散裂靶中子的能谱对加速器驱动次临界系统的倍增因数和嬗变率等影响很大，计算表明散裂靶中子谱在M eV能区与裂变中子谱相近。本文利用活化法测量临界装置的泄漏中子谱和中子注量率，提出了用In、Al、Mg、Ti、Au、Zn、Ni、Rh、Fe和Co等活化箔测量散裂靶中子能谱和中子注量率的方案。结果表明，将活化箔在散裂靶中子场中辐照5 h ，中子注量最高达5×1014 cm－2量级，辐照后1 h内取出活化箔，根据半衰期的长短安排测量顺序，可测量散裂靶的中子能谱和中子注量率。
산렬파중자적능보대가속기구동차림계계통적배증인수화선변솔등영향흔대，계산표명산렬파중자보재M eV능구여렬변중자보상근。본문이용활화법측량림계장치적설루중자보화중자주량솔，제출료용In、Al、Mg、Ti、Au、Zn、Ni、Rh、Fe화Co등활화박측량산렬파중자능보화중자주량솔적방안。결과표명，장활화박재산렬파중자장중복조5 h ，중자주량최고체5×1014 cm－2량급，복조후1 h내취출활화박，근거반쇠기적장단안배측량순서，가측량산렬파적중자능보화중자주량솔。
The spectrum of spallation neutron source is of great influence on the multi‐plication factor and transmutation rate of ADS .It is show n that the spectra of spallation target neutron and fission neutron are similar in MeV region .In this paper ,the leakage neutron spectrum and neutron fluence rate of the critical assembly w ere measured by activation method with In ,Al ,Mg ,Ti ,Au ,Zn ,Ni ,Rh ,Fe and Co foils as activation foils .T he results show that the activation method can be used to measure the neutron spectrum in the spallation target neutron field .T he neutron fluence should be up to 5 × 1014 cm -2 in 5 h .The activation foils should be taken out in 1 h after irradiation .The measure order is according to the length of the half‐life .