Development of high sensitivity radon detector by using of the membrane degasifier module and research for the pre-seismic phenomena.

为了提高水下测氡仪中溶解氡气的脱气效率，采用了中空薄膜或不锈钢球。静电收集容器的容量从1升扩大到70升。电源电压从-120V增加到-1500V。水下测氡仪的灵敏度提高了100倍以上。新的水下测氡仪安装在以下4个地点的测氡设施中：1)福井的平成-热泉；2)岐阜市的“神冈矿”；3)岐阜市的“卡沃伊”；4)岐阜县的“瓦里-伊什热泉”。在这些观测设施中，地下水稳定地供应给测氡仪。平成温泉的温泉以每分钟150升的水流量流动，更换为超高灵敏度水下测氡仪后，214&gt；Po的计数率提高了约130倍。溶解气体Capa…更多的城市温泉从2001年11月左右突然增加在“平成温泉”。通过对电磁流量计流量脉动的分析，确定了电磁流量计的溶解气体容量分为平静期、中期和颠簸3个阶段。撞击期为2002年7月4日至7月19日，2002年10月12日至11月9日。经过2002年7月18日的8月5日和11月19日的11月10日这段时间，水氡浓度突然升高。从下面的观测点看，在50公里以内发生了上述两次地震。(1)2002年8月18日福井县以北4.5级；(2)2002年11月17日石川县以南4.5级。在地震发生前1个月左右，出现了溶解气体容量的急剧增加和氡浓度的突然增加。这一观测结果被认为是利用高灵敏度水下测氡仪观测到的新的震前现象。至于下面提到的测氡结果，网址是用http://111.physics.gifu-u.ac.jp/.打开的较少

The hollow membrane or the stainless steel ball was used in order to improve the degasifier efficiency of the dissolved radon gas in the underwater radon detector. And the capacity of the electrostatic collection vessel from 1 liter was enlarged in 70 liters. The supplied voltage from -120V was increased in -1500V. The sensitivity of the underwater radon detector was increased 100 times or more. The new underwater radon detector was installed in the radon Observation facility of below-mentioned 4 places, 1) "Heisei-Hotspa" in Fukui, 2) "Kamioka mine" in Gifu, 3) "Kawaue" in Gifu, 4) "Wari-ishi Hotspa" in Gifu Prefecture. The underground water is stably supplied to the radon detector in these observation facilitie.The hot spring has flowed with the water flow rate of the 150 liters per minute at the "Heisei hot spa", and the count rate of the ^<214>Po increased in approximately 130 times after the exchanging to the super high sensitivity underwater radon detector. The dissolved gas capa … More city in the hot spring increased suddenly from around November of 2001 at the "Heisei hot spa". The being 3 stages, calm, mid and bumping period was ascertained in the dissolved gas capacity from the flow fluctuation analysis of the electromagnetic flow meter. Bumping period was July 19th from July 4th of 2002, and November 9th from October 12th of 2002. After the bumping period, the period of August 5th from July 18th of 2002 and November 10th from November 19th, water radon concentration increased suddenly. From the observation point below-mentioned two earthquakes occurred the within approximately 50 km. (1) North of Fukui Prefecture, Magnitude 4.5 at August 18th of 2002, (2) South of Ishikawa Prefecture, Magnitude 4.5 at November 17th of 2002. Bumping the dissolved gas capacity and, after that sudden increase of radon density was observed before about 1 month of earthquake occurrence. This observation result is thought it is the new earthquake pre-seismic phenomenon which was observed making use of the high sensitivity underwater radon detector. As for radon observation result below-mentioned URL, It is open with the http://111.physics.gifu-u.ac.jp/. Less