摘要
释光测年实验室照明光源的特征(波长与功率)直接影响到释光测年数据的准确性,因此释光测年技术对照明光源的要求很严格。通过对比,选择了典型的红光固体二极管R LED1(661±15)nm作为研究对象。利用R LED1点阵对已知剂量的石英和钾长石样品进行不同时间的光照后,再用单片再生法恢复样品的等效剂量,发现样品的等效剂量与已知剂量差别不大,表明石英和钾长石经过不同时间的R LED1点阵光照后没有发生明显的信号衰减,对测年样品没有影响。因此,利用波长为(661±15)nm的红光固体二极管作为释光测年实验室的照明光源是安全可靠的。
The choice of lighting is very vital for luminescence dating laboratory. Based on the bleaching of different wavelengths of quartz and feldspar, R-LED1 ( 661 15 nm ) was selected from three types of red LED ( R-LED1, R-LED2 and R-LED3 ) for its waveband and lighting intensity. To estimate the safety of R-LED1 array lighting, dose recovery test using single-aliquot regenerative-dose protocol was applied to the quartz and K-feldspar after exposure for different times to R-LED1 array lighting. The recovery doses showed that there was no obvious effect after exposure to R-LED1 array. Contrasting to the low-pressure sodium vapor lamp, R-LED1 array is safe for luminescence dating laboratory, and more convenient, cheaper for use. So R-LED1 array is an ideal lighting for luminescence dating laboratory.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2004年第1期133-137,共5页
Marine Geology & Quaternary Geology
基金
黄土与第四纪国家重点实验室基金(SKLLQ0317)
