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Dark energy, QCD axion, BICEP2, and trans-Planckian decay constant 会议论文
37th International Conference on High Energy Physics, Valencia, 2014
作者:  Jihn E. Kim
收藏  |  浏览/下载：7/0  |  提交时间：2016/07/13
Energy transfer in Y3Al5O12:Ce 3, Pr3+ and CaMoO4:Sm3, Eu 3 phosphors (EI CONFERENCE) 会议论文
Zhang J.; Wang L.; Jin Y.; Zhang X.; Hao Z.; Wang X.-J.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
Non-radiative energy transfers (ET) from Ce3 to Pr3+ in Y3Al5O12:Ce3  Pr3+ and from Sm3 to Eu3 in CaMoO4:Sm3  Eu3 are studied based on photoluminescence spectroscopy and fluorescence decay patterns. The result indicates an electric dipoledipole interaction that governs ET in the LED phosphors. For Ce3 concentration of 0.01 in YAG:Ce3  Pr3+  the rate constant and critical distance are evaluated to be 4.510-36 cm 6 s-1 and 0.81 nm  respectively. An increase in the red emission line of Pr3+ relative to the yellow emission band of Ce 3  on increasing Ce3 concentration is observed. This behavior is attributed to the increase of spectral overlap integrals between Ce3 emission and Pr3+ excitation due to the fact that the yellow band shifts to the red spectral side with increasing Ce3 concentration. In CaMoO4:Sm3  Eu3  Sm 3Eu3 transfer occurs from 4G5/2 of Sm3 to 5D0 of Eu3. The rate constant of 8.510-40 cm6 s-1 and the critical transfer distance of 0.89 nm are evaluated. 2010 Elsevier B.V. All rights reserved.  
Rotational reorientation dynamics of oxazine 750 in polar solvents 会议论文
the 12th international symposium of stereodynamics of chemical reactions, 中国, 2008-10-13
周潘旺; 宋辉; 刘建勇; 石英; 韩克利; 何国钟
收藏  |  浏览/下载：13/0  |  提交时间：2011/07/11
Rare-earth doped tungsten tellurite glasses and waveguides: Fabrication and characterization (EI CONFERENCE) 会议论文
Physics of Non-Crystalline Solids 10, October 15, 2004 - October 15, 2004, Parma, Italy
Conti G. N.; Berneschi S.; Bettinelli M.; Brenci M.; Chen B.; Pelli S.; Speghini A.; Righini G. C.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
Tungsten tellurite glasses doped with Er3+  Tm3+  Pr3+  and Ho3+ ions were prepared by melt quenching. The glass matrix was the same for all types of glasses and had a high sodium content in order to allow the fabrication of waveguides using an ion-exchange technique. The absorption spectra of the glasses were measured and the Judd-Ofelt parameters q were obtained from the experimental oscillator strengths of the f &rarr f transitions. Er3+ doped glasses showed a very high quantum efficiency when comparing the calculated radiative decay time with the measured lifetime of the 4I 13/2 metastable level. Ag+ Na+ ion-exchanged planar waveguides were successfully obtained in all types of glasses and characterized by the prism coupling technique. It turned out that the diffusion constant values are very similar for glasses containing different rare-earth ions with the same concentration  while  at least for the Er 3+ doped ones  the diffusion constant changes with the ions concentration. 2004 Elsevier B.V. All rights reserved.  
MEASUREMENTS OF ABSOLUTE HADRONIC BRANCHING FRACTIONS AND THE DECAY CONSTANT IN D DECAYS AT CLEO-C 会议论文
 32th International Conference on High Energy Physics, Beijing, 2004
作者:  A.RYD REPRESENTING THE CLEO COLLABORATION
收藏  |  浏览/下载：7/0  |  提交时间：2016/07/12
De-excitation dynamics of small molecules investigated by femtosecond multiphoton ionization 会议论文
international symposium on ultrafast phenomena & terahertz waves, 中国, 2000-7-22
王利; 刘洪平; 尹淑慧; 张建阳; 楼南泉
收藏  |  浏览/下载：19/0  |  提交时间：2011/07/11
EMPIRICAL ESTIMATES OF THE PROTON-NEUTRON INTERACTION AND DIABOLICAL POINTS 会议论文
作者:  ZHANG, JY;  GARRETT, JD;  CASTEN, RF;  BRENNER, DS;  WESSELBORG, C
收藏  |  浏览/下载：12/0  |  提交时间：2018/08/20
FINITE-DIFFERENCE TIME-DOMAIN SIMULATION OF REVERBERATION IN COUPLED ROOMS 会议论文
THE 3RD INTERNATIONAL SYMPOSIUM ON TEMPORAL DESIGN(第三届时间性设计国际研讨会), 广州, 2007年1月1日
作者:  Huang KP(黄坤朋);  Lu YG(卢义刚)
收藏  |  浏览/下载：1/0  |  提交时间：2019/04/17
Rossi-α方法测量金属核装置的瞬发中子衰减常数 会议论文
中国核学会2011年年会, 贵阳, 2011
作者:  蒋勇;  范晓强;  刘晓波;  郑春
收藏  |  浏览/下载：0/0  |  提交时间：2019/02/28

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