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首页> 外文会议>Reactor dosimetry. >Development of Neutron Measurement in Intense Gamma Field Using New Type of Nuclear Emulsion
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Development of Neutron Measurement in Intense Gamma Field Using New Type of Nuclear Emulsion

机译：利用新型核乳剂在强伽马场中子测量技术的发展

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To precisely measure the neutron emissions from a spent fuel assembly of a fast breeder reactor, we formed nuclear emulsions based on a non-sensitized Oscillation Project with Emulsion tRacking Apparatus (OPERA) film with AgBr grain sizes of 60, 90, and 160 nm. The efficiency for ~(252)Cf neutron detection of the new emulsion was calculated to be 0.7×10~(-4), which corresponded to an energy range from 0.3 to 2 MeV and was consistent with a preliminary estimate based on experimental results. The sensitivity of the new emulsion was also experimentally estimated by irradiating with 565 keV and 14 MeV neutrons. The emulsion with an AgBr grain size of 60 nm had the lowest sensitivity among the above three emulsions but was still sensitive enough to detect protons. Furthermore, the experimental data suggested that there was a threshold linear energy transfer of 15 keVμm for the new emulsion, below which no silver clusters developed. Further development of nuclear emulsion with an AgBr grain size of a few tens of nanometers will be the next stage of the present study.
机译：为了精确地测量快速增殖反应堆乏燃料组件中的中子排放，我们基于非感光振荡项目，并使用乳化分装装置（OPERA）膜（AgBr粒径分别为60、90和160 nm）形成了核乳剂。计算出新乳剂的〜（252）Cf中子检测效率为0.7×10〜（-4），对应于0.3到2 MeV的能量范围，与基于实验结果的初步估计相符。还通过用565 keV和14 MeV中子辐照来实验估计了新乳液的敏感性。 AgBr粒径为60 nm的乳剂在上述三种乳剂中灵敏度最低，但仍足以检测质子。此外，实验数据表明，新乳液的线性能量转移阈值为15keVμm，低于此阈值则没有银团簇形成。 AgBr晶粒大小为几十纳米的核乳液的进一步开发将是本研究的下一阶段。

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