D Ramakrishnan
Articles written in Proceedings – Section A
Volume 55 Issue 2 February 1962 pp 106-112
The1I6 state of Pr3+ in LaCl3 at 77°K
R M Agrawal R K Asundi R C Naik D Ramakrishnan Shobha Singh
A single crystal of 5% Pr3+ in LaCl3 was grown by Stockbarger’s method and its absorption spectrum at 77° K. recorded in the region 4200–5400 Å on a grating spectrograph having a dispersion of 5 Å/mm. in the first order. Polarization of the absorption lines has also been obtained. In the group of lines arising from1I6 ←3H4 transition, six more lines in addition to the four previously known have been observed. Satisfactory analysis of all these ten lines is given. One additional Stark level in1I6 is established at 21407 cm.−1 with
Volume 55 Issue 6 June 1962 pp 325-329
Ultra-violet absorption spectra and higher excited states of Nd3+ in LaCl3 at 77° K.
R M Agrawal R K Asundi R C Naik D Ramakrishnan Shobha Singh
The paper deals with an extension towards shorter wavelengths of the absorption spectrum of Nd3+ employing a 5% Nd3+ doped LaCl3 crystal. Five new groups of lines have been recorded and the analysis and interpretation of one of these groups,
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