蒋家沟流域现代泥石流物质选频光释光特征初步研究  

A preliminary research of characteristic of selected frequency luminescence for debris flow in Jiangjiagou valley

作　　者：刘兆文[1] 魏明建[1] 葛永刚[2] 李东旭[1] 潘宝林[1] 

机构地区：[1]首都师范大学光断代实验室,北京100048 [2]中国科学院成都山地灾害与环境研究所,成都610041

出　　处：《核技术》2009年第2期127-130,共4页Nuclear Techniques

摘　　要：采用BG2003释光仪研究了云南蒋家沟流域的大凹子沟、蒋家沟、泥得坪沟及其多照沟4个泥石流沟底泥石流物质的选频释光特征,确定了发射光子的特征发射频率。在蓝光(480nm)激发下,在波长为300nm、310nm、320nm、400nm和460nm下,大凹子沟与蒋家沟泥石流物质吸收的光子数都极为接近。用绿光(532nm)激发上述相同的样品,发现大凹子沟与多照沟底的泥石流物质吸收的光子数在波长为310nm、320nm时也十分相近;进而在相同实验条件下,用绿光激发东北地区沙漠砂样品,得出沙漠砂物质的吸收光子数远大于泥石流物质的吸收光子数。Four debris flow samples were separated from Nidepin, Duozhao and Dawazigou valleys in Jiangjiagou valley area, Yunnan province. They were measured with BG2003 luminescence spectrograph. The characteristic spectra of the selected frequency luminescence of samples from the different locations were obtained. The wave length of emission photons from samples of Dawazigou valley and Jiangjia valley are 300, 310, 320, 400 and 460 nm when it was using blue light （488 nm） excited. When the green light （532 nm） has been used to excited, the wave length of emission photons from samples of Dawazigou valley and Duozhao valley are similar high at 310 and 320 nm. Furthermore, using the green light excited the samples from desert sand at the same lab condition; the number of absorbed photons of samples from desert sand is much higher than from debris flow.

关 键 词：蒋家沟流域 泥石流 选频光释光 

分 类 号：TL824[核科学技术—核技术及应用]