Search results

Sort By:

Limit search:

Spectroscopic Properties of Neodymium Perchlorates in 2-Halogeno Derivatives of Ethanol. Part II

100%

Keller B., Legendziewicz J.

Acta Physica Polonica A

1993

vol. 84

issue 5

903-907

The spectroscopic studies of anhydrous neodymium perchlorate in two series of 2-halogeno derivatives of ethyl alcohol are presented. The changes of intensities of ^{4}I_{9/2} → ^{2}G_{7/2}, ^{4}G_{5/2} hypersensitive transitions are discussed within the framework of Mason's polarizability mechanism. Anomalous dependence of band intensities was found for the 2-fluoro derivatives. The linear relation of oscillator strength vs. solvent polarizability was broken for the 2-bromine and 2-iodine derivatives of ethyl alcohol. The effort was made for explanation of such strange results.

Comparison of Optical Properties of Eu^{3+} Ions in the Silica Gel Glasses Obtained by Different Preparation Techniques

71%

Legendziewicz J., Stręk W., Sokolnicki J., Keller B., Borzechowska M.

Acta Physica Polonica A

1996

vol. 90

issue 2

461-468

Silica sol-gel glasses doped with Eu^{3+} ions were obtained by different preparation techniques. The absorption, emission and excitation spectra of the obtained glasses were measured in the range of 77-300 K. The energy level diagrams of Eu^{3+} ions were derived. An intensity analysis of f-f transitions was performed. In particular, polymeric structure behaviour of europium compounds entrapped in silica gels glasses was temperature controlled during the preparation of glasses. Their optical properties were investigated.

Refine search results

2 Acta Physica Polonica A

1 1996

1 1993

2 Keller B.

2 Legendziewicz J.

1 Borzechowska M.

1 Sokolnicki J.

1 Stręk W.

Search results

Spectroscopic Properties of Neodymium Perchlorates in 2-Halogeno Derivatives of Ethanol. Part II

Comparison of Optical Properties of Eu^{3+} Ions in the Silica Gel Glasses Obtained by Different Preparation Techniques