...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Advanced Biotechnology and Research >Calibration of a conventional hand-held gamma spectrometer for measuring inner internal contamination in the thyroid
【24h】

Calibration of a conventional hand-held gamma spectrometer for measuring inner internal contamination in the thyroid

机译：校准用于测量甲状腺内部内部污染的常规手持式伽马能谱仪

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

After a radiological radiation despite the fact that whole-body counter is a special apparatus especially to measuretotal body radiation, there is not enough time to transfer injured people to the centers equipped with this device. Thisproject discusses about the possibility of measuring radioactivity caused by the breathing of individuals at the timeof incident by hand-held spectrograph. Experiments and measurements have been carried out by a gamma-rayspectrograph and a thyroid phantom and a 131I hotbed. It should be noted that background radiation plays animportant role in the outcome of the final result in all stages of testing and measurements which its effects will beexamined separately. In the end, an instruction will be prepared for calibration of handheld gamma spectrometerswith regard to extracting parameters affecting the efficiency and minimum detectable activity and its measures willbe developed for provision and deployment in nuclear disaster management centers in the country. The absolutereturn of detector was measured for Phantom thyroid containing 131I in the range between 0.1 and 0.03 in terms ofdistances up to 15 cm. in this research the amount of LLD was obtained to be equal to Bq128 which was in line withthe results of Sumber group (equal to 142 Bq). We also practically showed that this device is capable ofidentification and estimation of 131I- activity inside thyroid phantom in values near Bq250. This device has therequired practical capability to classify internal contamination of patients and it is very useful in this respect forprograms of internal contamination estimation in radiological accidents which may occur in nuclear medicinecenters and the nuclear industry.
机译：在进行放射线辐射后，尽管实际上全身计数器是一种专用于测量全身辐射的特殊设备，但没有足够的时间将受伤人员转移到配备此设备的中心。该项目讨论了使用手持式光谱仪测量由事故发生时个人呼吸引起的放射性的可能性。实验和测量已通过伽马射线光谱仪，甲状腺体模和131I温床进行。应当注意，背景辐射在测试和测量的所有阶段中最终结果的结果中都起着重要作用，其作用将单独进行检查。最后，将就提取影响效率和最小可检测活动的参数准备校准手持式伽马能谱仪的指令，并将制定其措施以在该国核灾难管理中心提供和部署。对于最大距离为15 cm的131 I幻影甲状腺，其检测到的绝对返回值在0.1到0.03之间。在这项研究中，LLD的数量等于Bq128，与Sumber组的结果一致（等于142 Bq）。我们还实际表明，该设备能够识别和评估甲状腺体模中Bq250附近的131I活性。该装置需要对患者的内部污染进行分类的实用能力，并且在这方面对于在核医学中心和核工业中可能发生的放射事故中的内部污染评估程序非常有用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号