CAJ | 학술논문

用飞行时间方法测量200keV－12MeV能区内248Cm和252Cf自发裂变瞬发中子谱，以国际原子能机构推荐的252Cf自发裂变瞬发中子谱为标准，可以免去探测器效率刻度的问题并消除系统误差，提高测量精度.实验用一个微型电离室作为裂变碎片探测器，两个芪晶体中子探测器测量中子及一套基于微机的CAMAC系统组成的飞行时间测量谱仪，在一个空旷的测量室内完成的.飞行距离分别为32，50和100cm，经过对数据的处理和分析给出了200keV－12MeV的中子能区内的实验数据.用Maxwell分布对实验数据进行拟合，得到的核温度为(1.401±0.006)MeV.
용비행시간방법측량200keV－12MeV능구내248Cm화252Cf자발렬변순발중자보，이국제원자능궤구추천적252Cf자발렬변순발중자보위표준，가이면거탐측기효솔각도적문제병소제계통오차，제고측량정도.실험용일개미형전리실작위렬변쇄편탐측기，량개기정체중자탐측기측량중자급일투기우미궤적CAMAC계통조성적비행시간측량보의，재일개공광적측량실내완성적.비행거리분별위32，50화100cm，경과대수거적처리화분석급출료200keV－12MeV적중자능구내적실험수거.용Maxwell분포대실험수거진행의합，득도적핵온도위(1.401±0.006)MeV.
In order to treat the waste material of nuclear power and develop new type of clean nuclear power, it is necessary to measure the neutron data of long half life nuclei existed in the waste material. The prompt spontaneous neutron spectrum is one of the most important nuclear data for new type nuclear power facilities as well as for understanding the mechanism of fission neutron emission. The measurements of 248Cm/252Cf spontaneous prompt fission neutron spectrum in the neutron energy range from 200keV to 12MeV were performed by using TOF method. A micro-ionization chamber was used as fission fragment detector and stibene crystal as neutron detector. The flying paths of neutrons for the measurements were 30cm, 50cm and 100cm respectively. The spontaneous prompt fission neutron spectrum of 248Cm was fitted by the Maxwellian distribution and the temperature was determined as(1.401±0.006)MeV in the corresponding neutron energy range.