P K Singh
Articles written in Pramana – Journal of Physics
Volume 68 Issue 5 May 2007 pp 875-880 Brief Reports
A complete normal coordinate analysis was performed for five-coordinate non-rigid triarylantimony diester SbPh3(O2CR2), known to be a bioactive molecule, using Wilson G-D matrix method and Urey Bradley force field. The study of vibrational dynamics was performed using the concept of group frequencies and band intensities.
Volume 69 Issue 4 October 2007 pp 675-680 Brief Reports
A complete normal coordinate analysis was performed by two different methods: a classical Wilson's G-F matrix method and the semi-empirical molecular orbital PM3 method, for a five coordinate tris(𝑝-fluorophenyl)antimony di(𝑁 -phenylglycinate) [(𝑝-FC6H4)3Sb(O2CCH2NHC6H5)2], known to be an in vitro antitumour molecule.
Volume 83 Issue 3 September 2014 pp 387-393
We demonstrate the generation of an isotopically pure beam of laser-cooled Yb atoms by deflection using 1D-optical molasses. Atoms in a collimated thermal beam are first slowed using a Zeeman slower. They are then subjected to a pair of molasses beams inclined at 45° with respect to the slowed atomic beam. The slowed atoms are deflected and probed at a distance of 160 mm. We demonstrate the selective deflection of the bosonic isotope 174Yb and the fermionic isotope 171Yb. Using a transient measurement after the molasses beams are turned on, we find a longitudinal temperature of 41 mK.
Volume 96, 2022
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