Based on the nuclear pumped laser technique, an optical self-powered neutron detector is now being investigated, in the JAERI Advanced Science Research Center. The first experiment has been made using lasing gas cells with three components of He-3 gas (1140 mmHg), Ne gas (588 mmHg) and H/sub 2/ gas (206 mmHg or 412 mmHg), or Ar gas (206 mmHg) instead of H/sub 2/ gas in a thermal neutron flux of about 10/sup 9/n/cm/sup 2/ sec. For this irradiation, optical light of 585.3 nm from the transition of Ne 3P/sub 1//spl rarr/3S/sub 2/ has been observed clearly from those gas cells. The optical light output was increased according to the reactor power and the measurement of the optical attenuation coefficient of 585.3 nm in this gas has been made and is found to decrease for increasing neutron flux. From these results, the nuclear pumped laser can be expected to be in operation above a neutron flux of 10/sup 11/n/cm/sup 2//spl middot/sec. The second experiment is now under preparation.
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机译:基于核泵浦激光技术,现在正在研究嘉佳先进科学研究中心的光学自动中子探测器。使用具有激光气体细胞的第一个实验,其中具有三种He-3气体(1140mmHg),Ne气体(588mmHg)和H / sub 2 / gas(206mmHg或412mmHg)或Ar气体(206mmHg )除了约10 / soP 9 / n / cm / sup 2 / sec的热中子通量中的H / sum 2 /气体。对于该辐射,从那些气体细胞清楚地观察到来自NE 3P / SEC 1 // SPL rarR / 3S / Sup 2 /的过渡的585.3nm的光学光。根据反应器功率增加光学光输出,并且已经制造了该气体中585.3nm的光学衰减系数的测量,并且发现用于增加中子磁通量的降低。从这些结果来看,可以预期核泵浦激光器在10 / sp1 / n / cm / sup 2 // spl middot / sec的中子通量以上的操作中。第二个实验现在正在制备。
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