共查询到19条相似文献,搜索用时 62 毫秒
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固体气泡损伤探测器探测高能重离子的研究 总被引:1,自引:0,他引:1
用高能重离子Ar和C进行的实验表明:(1)高能重离子可以在固体气泡损伤探测器中产生径迹,重离子径迹呈直线形,由一连串微小气泡组成;(2)固体气泡损伤探测器探测重离子具有阈特性,阈的实质近似为临界能量损失率(dE/dX)C,这一阈特性与蚀刻径迹探测器类似。固体气泡损伤探测器的阈值为(dE/dX)c=2220MeV/g·cm2,可用于重离子物理、宇宙射线和宇宙暗物质探测以及癌症治疗模拟等领域。 相似文献
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用自行研制的5种固体气泡损伤探测器在日本国立辐射科学研究所高能重离子加速器HIMAC上用150MeV/u4He、490MeV/u28Si和500MeV/u56Fe对其进行了阈值刻度,得到它的阈值分别为:82.4(T-15型)、1536±232(T-34型)、1628±4(T-12型)、2335±332(T-24型)和 6 060±2 065(T-14型)MeV·g-1·cm2。它们的阈值在几十至几千MeV·g-1·cm2范围内分立排开,这一范围相当于常温情况下固体气泡损伤探测器通常能达到的最高灵敏度和最低灵敏度范围。由这些阈值可推算用固体气泡损伤探测器分辨重离子的分辨参数和推算各种 相似文献
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用自行研制的T-15型固体气泡损伤探测器,在日本和光市理化学研究所(RIKEN)回旋加速器上用210MeV质子对其记录质子的性能进行了研究。实验证明:T-15型固体气泡损伤探测器能直接记录质子径迹。由于质子的可记录射程很短,质子径迹只由少数气泡组成。用固体气泡损伤探测器记录质子径迹的成功将扩展固体气泡损伤探测器的应用领域,对已开展 相似文献
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郭士伦 DOKE T 李丽 陈宝流 张东海 KIKUCHI J TERASAWA K KOMIYAMA M HARA K FUSE T YASUDA N MURAKAMI T 《核技术》2005,28(9):659-662
利用高能重离子p、He、C、Si、Ar、Fe、Kr和Xe对固体气泡探测器的性质进行了研究。结果表明,固体气泡探测器具有许多与固体核径迹探洲器相似的性质,且具有显影主动性、实时记录性、体径迹显示能力等多方面普通固体核径迹探测器所不具有的性能。可以得出结论:固体气泡探测器是固体核径迹探测器的一种新类别。 相似文献
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气泡探测器被认为是唯一能满足国际放射防护委员会ICRP60要求的个人中子剂量计,它有极高的中子灵敏度,而且适用的中子能量范围可达100eV~10MeV,是核能和民用等核环境中中子 相似文献
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气泡中子探测器用于个人剂量监测 总被引:1,自引:0,他引:1
气泡中子探测器是可重复使用、积分型、无源剂量计。它的体积小,可对中子辐射进行直接、可视的测量。为了将气泡中子探测器用在个人剂量监测中,先验证气泡中子探测器对从0.2~15MeV能量的中子具有平直的能量响应。然后用5.10和1.3MeV的中子考察了气泡中子探测器的线性及其稳定性。 相似文献
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The Possibility of using 209Bi as a new threshold detector to measure high-energy neutrons was investigated for the first time.At the same time the experiment measured successfully the emitted neutron fluence rate,energy spectrum and dose equivalent rate distributions in the heavy ion target area using a detector complex including 209Bi,^115In,^27Al,^19Fand ^12C samples. 相似文献
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Visual experimental study focusing on bubble growth and departure behaviors in a narrow rectangular channel was carried out in this paper. Deionized water was used as working fluid, and the experiment was performed at atmospheric pressure. The cross section of the narrow rectangular channel is 2 mm × 8 mm. A high speed digital camera was applied to capture the behaviors of bubble growth and bubble departure from the nucleation site. The bubble departure diameter, bubble inclination angle, upstream contact angle, downstream contact angle and bubble contact diameter were obtained according to the observation. An analysis of force balance on a growing bubble was performed to predict the bubble departure diameter in the narrow channel, and the effect of bubble interface parameters on the prediction of bubble departure diameters was discussed in this paper. The result of predicted model agrees well with the experimental result with a maximum relative deviation less than 25%. According to the study proposed in this paper, the mechanism of bubble departure from a nucleation site can be explained based on the force balance analysis of a growing bubble, and the major forces dominating the bubble departure are the buoyancy force, surface tension force and quasi-steady drag force. 相似文献
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蓬勃发展的位置灵敏气体探测器 总被引:3,自引:0,他引:3
李金 《核电子学与探测技术》2001,21(1):70-75
介绍了近年来气体位置灵敏探测器的发展,简要描述了几种新型的高位置分辨、高计数率的探测器:MSGC、MGC、MICROMEGAS、GEM等。 相似文献
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ThomasVPrevenslik 《核技术(英文版)》1997,8(4):236-238
Computations of air bubble collapse dynamics usually neglect thermal conduction.but recent computations show about a 3-fold reduction in bubble gas temperature if thermal conduction is included.However,an isothermal collapse at ambient temperature is even more likely because the air molecuses collide with and stick to the bubble walls during bubble expansion and are not available for compression heating during collapse.The probability of isothermal collapse is shown to depend on the mean free path of the air molecules moving through the H2O vapor molecules within the bullbe during bubble expansion and is sensitive to the lowering of ambinet temperature to the freezing point. 相似文献
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硅多条两维位置灵敏探测器的研制 总被引:1,自引:0,他引:1
描述了用平面工艺技术研制基于硅多条的两维位置灵敏探测器的制备工艺技术及性能测试初步结果.这种探测器的灵敏面积为50 mm×50 mm.P掺杂面被等分成相互平行的长度为50mm,宽度为3mm的16条,相邻条之间的间隔为100μm.硅条P掺杂层是一层均匀分布的电阻层,利用电荷分除法,可以得到入射粒子在该条上的位置(Y位置).当探测器工作在全耗尽偏压下时,大部分单条的反向漏电流<30nA.对239Pu α粒子得到能量分辨率<2.5%,位置分辨<0.5 mm. 相似文献