This paper has observed linewidth narrowing of dark states in rubidium cell by using the Hanle configuration. The reduction of the coherent resonance width under the transition of ^87Rb Fg = 1 → Fe = 0 is observed an...This paper has observed linewidth narrowing of dark states in rubidium cell by using the Hanle configuration. The reduction of the coherent resonance width under the transition of ^87Rb Fg = 1 → Fe = 0 is observed and the qualitative explanation about its mechanism is presented. Multiple subnatural width dips are obtained with a linearly polarized laser beam for the transitions of ^87Rb Fg = 1→Fe = 0, 1, 2. The feature of negative and positive slope, namely dispersionlike feature, is observed in the transmitted light.展开更多
A method of the relaxation time measurement in a flowing sample, based on the comparison of the amplitudes of nuclear magnetic resonance(NMR) signals observed from the reference and tested flowing samples was represen...A method of the relaxation time measurement in a flowing sample, based on the comparison of the amplitudes of nuclear magnetic resonance(NMR) signals observed from the reference and tested flowing samples was represented. The inductive and optical methods of NMR signal detection in the flowing sample were compared.The levels of NMR signal(10000 Hz-1/2) and the Hanle magnetometers signal-to-noise ratio(3500 Hz-1/2) were calculated and the possibility of the NMR signal detection with the small-size Hanle magnetometer was demonstrated. Additionally, the absence of a magnet-analyzer and the ability to measure both longitudinal and transverse relaxation time with high accuracy was demonstrated.展开更多
古滑坡一般是指全新世以前地质历史时期发生的滑坡。武都汉林沟流域发育有第四纪晚更新世以来不同时期的滑坡,具有规模大、数量多的特点,为武都白龙江中游滑坡发育历史研究提供了典型实例。通过滑坡体的形貌、结构特征、与其他地层的接...古滑坡一般是指全新世以前地质历史时期发生的滑坡。武都汉林沟流域发育有第四纪晚更新世以来不同时期的滑坡,具有规模大、数量多的特点,为武都白龙江中游滑坡发育历史研究提供了典型实例。通过滑坡体的形貌、结构特征、与其他地层的接触关系分析,确定古滑坡的存在。同时也发现古滑坡曾堵塞汉林沟形成堰塞湖,并压埋了许多古树木,古滑体中残留大量植物遗骸,通过14C测定,进一步确定汉林沟流域古滑坡形成时间为42.0～44.8 ka BP。展开更多
文摘This paper has observed linewidth narrowing of dark states in rubidium cell by using the Hanle configuration. The reduction of the coherent resonance width under the transition of ^87Rb Fg = 1 → Fe = 0 is observed and the qualitative explanation about its mechanism is presented. Multiple subnatural width dips are obtained with a linearly polarized laser beam for the transitions of ^87Rb Fg = 1→Fe = 0, 1, 2. The feature of negative and positive slope, namely dispersionlike feature, is observed in the transmitted light.
文摘A method of the relaxation time measurement in a flowing sample, based on the comparison of the amplitudes of nuclear magnetic resonance(NMR) signals observed from the reference and tested flowing samples was represented. The inductive and optical methods of NMR signal detection in the flowing sample were compared.The levels of NMR signal(10000 Hz-1/2) and the Hanle magnetometers signal-to-noise ratio(3500 Hz-1/2) were calculated and the possibility of the NMR signal detection with the small-size Hanle magnetometer was demonstrated. Additionally, the absence of a magnet-analyzer and the ability to measure both longitudinal and transverse relaxation time with high accuracy was demonstrated.
文摘古滑坡一般是指全新世以前地质历史时期发生的滑坡。武都汉林沟流域发育有第四纪晚更新世以来不同时期的滑坡,具有规模大、数量多的特点,为武都白龙江中游滑坡发育历史研究提供了典型实例。通过滑坡体的形貌、结构特征、与其他地层的接触关系分析,确定古滑坡的存在。同时也发现古滑坡曾堵塞汉林沟形成堰塞湖,并压埋了许多古树木,古滑体中残留大量植物遗骸,通过14C测定,进一步确定汉林沟流域古滑坡形成时间为42.0～44.8 ka BP。
