机构

• 长春光学精密机械与物... [2]
• 数学与系统科学研究院 [1]
• 高能物理研究所 [1]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• 期刊论文 [2]

发表日期

• 2022 [1]
• 2013 [1]
• 2012 [1]
• 2003 [1]

学科主题

• Physics [1]

筛选

浏览/检索结果: 共4条，第1-4条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Concentration phenomenon of semiclassical states to reaction-diffusion systems 期刊论文  OAI收割 ANNALI DI MATEMATICA PURA ED APPLICATA, 2022, 页码: 39 作者:  Gou, Tianxiang;  Zhang, Zhitao   |  收藏  |  浏览/下载：17/0  |  提交时间：2023/02/07 Concentration phenomenon  Semiclassical states  Reaction-diffusion system  Variational methods   Structure and magnetic properties of (Al, Co) Co-doped ZnO thin films (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Materials Science and Nanotechnology, ICMSN 2012, November 16, 2012 - November 18, 2012, Guangzhou, China Cao P.; Bai Y. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 In this study  Zn0.99Co0.01Al0.015O thin film has been prepared by sol-gel method. The structural and magnetic properties of the sample were investigated. X-ray diffraction spectroscopy analyses indicate that the Co and Al codoping can not disturb the structure of ZnO. No additional peaks are observed in the Zn0.99Co0.01Al xO and Al3+ and Co2+ substitute for Zn 2+ without changing the wurtzite structure. The resistance measurements confirm that Al ions increase the free carriers concentration. Based on the above experiments we think the ferromagnetic behavior of the sample could not originate from Co nanoclusters. The presence of free carriers and localized d spins is a prerequisite for the appearance of ferromagnetism. As the result  the carriers generated by Al doping is considered a main factor to induce the ferromagnetic phenomenon. (2013) Trans Tech Publications  Switzerland.   Influence of sensitizer concentration on the upconversion luminescence of NaYF4: Yb3+, Er3+ nanoparticles (EI CONFERENCE) 会议论文  OAI收割 2012 2nd International Conference on Machinery, Materials Science and Engineering Applications, MMSE 2012, June 16, 2012 - June 17, 2012, Wuhan, China 作者:  Zhao J.;  Zhao Y.;  Zhao Y.;  Zhao Y. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 A series of NaYF4: Yb3+  Er3+ nanoparticles with different doping concentration were successfully prepared by the combination of coprecipitation and hydrothermal methods using sodium citrate as chelator. Upconversion luminescence can be observed in all of the samples at room temperature. Fixed the Er3+ concentration with 1 mol% unchanged  the effect of the Yb3+ concentration on the upconversion luminescence of NaYF4: Yb3+  Er3+ samples were studied when the doped Yb3+ concentrations were 0 mol%  1 mol%  2 mol%  5 mol%  10 mol% and 20 mol%  respectively. As increasing the Yb 3+ concentration  the total intensity of the upconversion luminescence of the samples is increasing while the ratio of red to green emission increases firstly and then decreases. The maximum ratio value is 22.1 when the Yb3+ concentration is 10 mol%. It is found that the cross relaxation and cooperative sensitization effect are the reasons for the phenomenon above. (2012) Trans Tech Publications.   Lateral distribution of shower particles in high energy family events of cosmic rays 期刊论文  OAI收割 HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 2003, 卷号: 27, 期号: 4, 页码: #REF! 作者:  Wang, H;  Wang, YG;  Dai, ZQ;  Xue, L;  Feng, CF 收藏  |  浏览/下载：13/0  |  提交时间：2016/04/13 lead emulsion chamber  Monte Carlo simulation  family event  lateral distribution  phenomenon of energy concentration