【摘 要】
:
用染料激光对热管炉中Ba蒸气进行研究时,在4200~4340A波长范围内,发现一宽带结构及一系列Ba原子的非基态能级产生的跃迁线,用Ba_2准分子的解离对可能产生跃迁的动力学过程做了分析,此宽带结构被归结为Ba_2准分子峰.
论文部分内容阅读
用染料激光对热管炉中Ba蒸气进行研究时,在4200~4340A波长范围内,发现一宽带结构及一系列Ba原子的非基态能级产生的跃迁线,用Ba_2准分子的解离对可能产生跃迁的动力学过程做了分析,此宽带结构被归结为Ba_2准分子峰.
其他文献
Terahertz time-domain spectroscopy (THz-TDS) is a new coherent spectral technique to measure transmission spectra and analyze the spectral characteristics of samples. In this letter, the transmission spectra of edible pigments in the THz frequency range a
针对铝合金激光点焊容易出现的问题,自建了一套精确控制送丝系统,分析铝合金激光填丝点焊的可行性,并且研究了送丝角度、延迟时间、送丝量等送丝参数的影响。研究结果表明,激光填丝点焊可以明显地改善铝合金激光点焊过程中容易出现的缺陷;送丝角度是焊丝熔化后能否稳定进入熔池的关键因素,送丝角为30°左右时,熔化焊丝进入熔池最为稳定;延迟时间过短,熔池尺寸过小时送进焊丝,易造成焊丝在试件上表面的堆积;而送丝量与焊点表面下塌的改善效果相关。
基于可见/近红外漫透射光谱技术,探讨了对不同产地石榴的品质进行快速无损检测的可行性。首先,利用能够有效抑制杂散光影响的动态在线检测装置采集石榴的近红外光谱,测试石榴糖度的真值;然后结合主成分分析法对不同产地的石榴进行聚类分析,大致将样品分为两类;最后建立不同产地石榴的偏最小二乘判别分析模型,模型的判别准确率为97%以上。采用多种预处理方法(S-G平滑、归一化、基线校正、MSC等)建立了两类石榴的单一模型,结果表明:基线校正的效果明显优于其他方法,所建立的四川石榴模型的预测集相关系数Rp为0.82,预测集均
Using two-step growth method and buffer layer annealing treatment, the double heterojunction structures of In0.82Ga0.18epilayer capped with InAs0.6P0.4layer were prepared on InP substrate by low pressure metal o
为了更加全面分析测量设备无关量子密钥分配协议,对基于标记配对相干态的测量设备无关量子密钥分配协议进行了统计涨落分析。首先分析了当光源在统计涨落时,随着发送信号脉冲数的增加,误码率和密钥生成率与传输距离的关系。结果表明,增加脉冲数能增大密钥生成率和最大传输距离,降低误码率,且基于标记配对相干态的协议性能比基于指示单光子源的协议性能要好。进一步分析了光源在统计涨落时,基于标记配对相干态的测量设备无关量子密钥分配协议在非对称信道中的密钥生成率与传输距离的关系,由仿真结果得知,非对称信道时的性能比对称信道时的性能
A new grouped precoding technique based on discrete cosine transform (DCT) is presented for peak to average power ratio (PAPR) reduction of optical intensity modulated/direct detection (IM/DD) orthogonal frequency division multiplexing (OFDM) system. The
All-dielectric metamaterials have emerged as a promising platform for low-loss and highly efficient terahertz devices. However, existing fabrication methods have difficulty in achieving a good balance between precision and cost. Here, inspired by the nano
This paper designs an energy-quality multilevel framework for the coding and transmission of aerial images, and then introduces a scaling-based intra encoder with flexible sampling factor (SF) and quantization parameter (QP). By experimentally investigati
A novel direct writing technique using submicron-diameter fibers is presented. This technique adopts contact mode in the process of writing, and submicron lines with different widths have been obtained. Experimental results demonstrate that the resolution