An Investigation of Absorption Spectra of Li2GeO3: Cr3+ Crystal

2012 ◽  
Vol 560-561 ◽  
pp. 906-908
Author(s):  
Feng Miao ◽  
Ying Huang
Keyword(s):  
Experimental Data ◽  
Crystal Field ◽  
Absorption Spectra ◽  
Energy Levels ◽  
Crystal Field Parameter ◽  
Field Parameter ◽  
Energy Matrix

Considering the crystal field parameter B, C and average covalent factor N, the energy levels of Li2GeO3: Cr3+ crystal are calculated by diagonalizing the energy matrix of 3d3. The experimental data are compared with calculated results. The results show that the calculated results are in agreement with experiments. Absorb spectra are successfully identified.

Study on Spectra and Mg-O Bond-Length of NaMg3Al(MoO4)5: Cr3+ Crystal at Low Temperature

2012 ◽  
Vol 560-561 ◽  
pp. 651-654
Author(s):  
Yi Huang ◽  
Feng Miao
Keyword(s):  
Low Temperature ◽  
Bond Length ◽  
Crystal Field ◽  
Energy Levels ◽  
Crystal Field Parameter ◽  
Field Parameter ◽  
Energy Matrix ◽  
Relationship Of

Considering the crystal field parameter Dq and average covalent factor N, the energy levels of NaMg3Al(MoO4)5: Cr3+ crystal at 295 K are calculated by diagonalizing the energy matrix of 3d3. At low temperature 9 K the bond length of Mg-O is calculated by adjusting the value to fit the spectra of Mg site. The value of Mg-O bond length is 2.0528 Å. The equation relationship of Mg-O between bond length and temperature is achieved.The calculated values are consistent with the experimental spectra.

Study on the Absorption Spectra of Ga2Se3:Co2+ Single Crystals

2009 ◽  
Vol 64 (12) ◽  
pp. 834-836
Author(s):  
Chao Ni ◽  
Yi Huang ◽  
Maolu Du
Keyword(s):  
Experimental Data ◽  
Fine Structure ◽  
Bond Length ◽  
Single Crystals ◽  
Crystal Field ◽  
Energy Levels ◽  
Crystal Field Parameter ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Cubic Crystal

Introducing the average covalent factor N and considering the interaction of the cubic crystal field, the spin-orbit coupling and Tree’s correction effects, the crystal field parameter Dq was calculated. Also the varying tendency of Dq with the bond length R was investigated. Using the complete diagonalizing method the energy levels of the fine structure of Ga2Se3:Co2+ single crystal were calculated and assigned. The calculated and assigned results are consistent with the experimental data

Energy levels and crystal field parameter of Eu3+ in {(C4H9)4N}3Eu(NCS)6

1983 ◽  
Vol 46 (6) ◽  
pp. 465-468 ◽  
Author(s):  
W.M. de Azevedo ◽  
Gilberto F. de Sá ◽  
M. Faucher
Keyword(s):  
Crystal Field ◽  
Energy Levels ◽  
Crystal Field Parameter ◽  
Field Parameter

Local mean chromium–oxygen distances in Cr3+-centered octahedra of natural grossular-uvarovite garnet solid solutions from electronic absorption spectra

2004 ◽  
Vol 219 (5) ◽  
Author(s):  
Klaus Langer ◽  
Alexej N. Platonov ◽  
Stanislav S. Matsyuk
Keyword(s):  
Crystal Field ◽  
Absorption Spectra ◽  
Solid Solutions ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Crystal Field Parameter ◽  
Field Parameter ◽  
Local Mean ◽  
Good Agreement

AbstractThe crystal field parameter 10Dq10DqThe 10DqEquation (a) is in very good agreement with mean 〈Al/Cr—O〉; distances of “individual” octahedra

Theoretical Study of Energy Levels Splitting of Praseodymium-Doped Trichloride

2013 ◽  
Vol 774-776 ◽  
pp. 992-995
Author(s):  
Mei Ling Duan ◽  
Jin Hong Li ◽  
Xiao Feng Yang
Keyword(s):  
Rare Earth ◽  
Crystal Field ◽  
Ionic Radius ◽  
Theoretical Study ◽  
Energy Levels ◽  
Rare Earth Ions ◽  
Energy Matrix ◽  
Irreducible Tensor ◽  
Crystal Field Parameters ◽  
Complete Energy Matrix

A 91×91 complete energy matrix of 4f2configuration ion Pr3+in triagonal crystal fieldC3hhas been constructed based upon the combination of Racahs irreducible tensor with Slaters wavefunctions. Thus, the Stark energy levels of Pr3+in trichlorides LaCl3have been calculated. The calculation result shows that the complete energy matrix method is effective to analyze the energy levels splitting of the doped entity by rare earth ions. We also know that the consideration to the sixth-order crystal field parameters is indispensable and the ionic radius of the replaced ion will play an important role in the energy levels splitting of the doped systems.

Colour centres in zircon containing both Eu3+ and U4+ ions

1970 ◽  
Vol 23 (8) ◽  
pp. 1513 ◽  
Author(s):  
PE Fielding
Keyword(s):  
Experimental Data ◽  
Single Crystals ◽  
Absorption Spectra ◽  
Electron Energy ◽  
Energy Levels ◽  
Alkali Halides ◽  
Colour Centres

Single crystals of zircon containing both Eu3+ and U4+ were grown from flux melts cooled at rates varying between 4�/hr and 2�/hr. Irradiation with u.v. develops colour centres only in those regions of a crystal containing Eu3+ and U4+. Fluorescence and absorption spectra measured at temperatures down to 77�K show that these centres are similar in behaviour to F and F' centres in the alkali halides. They are thought to be related to an exchange coupled pair, U4+-02-Eu3+, but the experimental data permit only a description in terms of one-electron energy levels. The same basic behaviour is observed for zircon containing U4+ and any other lanthanide but some interesting differences are described for U4+, Dy3+.

Theoretical Investigation of Energy Levels Splitting of CsCdBr3:Pr3+ Crystal

2011 ◽  
Vol 418-420 ◽  
pp. 665-669
Author(s):  
Mei Ling Duan ◽  
Xiao Feng Yang ◽  
Jin Hong Li
Keyword(s):  
Crystal Field ◽  
Energy State ◽  
Energy Levels ◽  
Energy Matrix ◽  
Host Crystal ◽  
State Information ◽  
Experimental Values ◽  
Crystal Field Parameters ◽  
Complete Energy Matrix ◽  
Good Agreement

Based upon the single electron energy state information and the combination of Racah’s group-theoretical consideration with Slater’s wavefunctions, the 91×91 complete energy matrix of 4f2 configuration ion Pr3+ in C3v crystal field has been constructed. The calculated Stark energy levels of CsCdBr3:Pr3+ present a good agreement with the experimental values, which implies that the complete energy matrix method can be received as a recommendable tool to perform a theoretical analysis to the doped crystal. Besides, the influence of Pr3+ ions on the energy levels splitting of the host crystal CsCdBr3 has been compared with two doped trichlorides by Pr3+ ions, which indicates that the sixth order crystal field parameters play an indispensable role in splitting the energy levels.

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