Development of Liquid Lithium Target of 7Li(p,n)7Be Reactions for Accelerator Based BNCT Irradiation System

摘要：

　　A feasibility study of using a liquid lithium target was performed.The candidate configurations for the neutron generation target was adapted for the 7Li(p,n)7Be assuming a proton beam which is 30 mm in diameter and with an energy and current of up to 3 MeV and 20 mA,respectively.The flowing film of liquid lithium was 0.5 mm-thick with 50 mm width and 50 mm length.The shapes of the nozzle and concave back wall,which creates a stable flowing film jet,were decided based on water experiments.The flowing film on the concave wall is a windowless type target.A lithium hydrodynamic experiment was carried out to observe the liquid lithium flow behavior and to investigate the stability of the lithium target.The flowing film of liquid lithium was found to be feasible at temperatures below the liquid lithium boiling saturation of 342 degrees Celsius at the surface pressure of 1x10-3 Pa.Using a test liquid lithium circulating loop,it was found that a stable film flow on a concave back wall can be expected at a velocity of up to 30 m/sec.At present,proto-type lithium circulating loop for practical BNCT irradiation system was built and is under examination.

关键词： Liquid Lithium Film Flow Neutron Generation Target Accelerator Neutron Capture Therapy

作者: Tooru Kobayashi Kenichi Tanaka Gerard Bengua Noriyosu Hayashizaki Tatsuya Katabuchi Minoru Takahashi Masanori Aritomi

作者单位: Kyoto University Research Reactor Institute, Osaka Japan Center of Medical Education, Sapporo Medical University, Hokkaido Japan Medical Physics Department, Auckland Hospital, Auckland, New Zealand Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Tokyo Japan

会议类型: 国际会议

会议名称: World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))

会议地点: 北京

会议语种:英文

页码: 1907-1910

在线出版日期: 2012-05-26（万方平台首次上网日期，不代表论文的发表时间）