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Baliyan, K S; Srivastava, M K
The triple differential crosssections for the ionization of atomic hydrogen by fast electrons are considered in the case of a coplanar symmetric energysharing geometry. They are estimated in the modified Glauber (MG) approximation. It is found that MG results are significantly different from those in the second Born approximation only for 90°⩽ϑ⩽110°. Outside this range they are almost identical.
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By
Maharana, K; Singh, L P
A scheme is presented for baryon asymmetry generation in early universe through monpoleinduced baryon number violating processes in the context of a preonic model.
By
Auluck, F C; Gupta, G C; Nanda, V S
4 Citations
In this paper we have derived an exact expression for the molecular size distribution in living polymers for batch polymerization when depropagation is simultaneously operative. This expression is valid at a point of time when inhomogeneity is slightly greater than half that of the final equilibrium distribution.
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By
Hoyle, F.; Narlikar, J. V.
It is shown that the luminosityvolume test for optically selected objects has an inbuilt bias towards increasing the average value ofV/V_{m} above the Euclidean value of 1/2. A more satisfactory biasfree statistic is suggested in the form of In (V/V_{m}), The result of applying the test to a sample from the Bright Quasar Survey (BQS) shows that the local hypothesis of quasars is consistent with the data.
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By
Ullah, Nazakat
A determinantal identity is used to calculate the ensembleaveraged traces of the Hamiltonian. Using these averages a general expression is obtained for the Fourier transform of the single eigenvalue probability density function for all the three Gaussian ensembles for the twodimensional case. It is shown how one can use the familiar stepup operators for the representation of a determinant. The ensembleaveraged traces are also used to derive the Fourier transform of the nonzero mean ensemble.
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By
Das, G P; Sahni, V C
2 Citations
The PattisonWilliams method of using Fouriertransformed Compton profiles for obtaining Fermi momenta in simple metals, is extended to set up a scheme for inferringd orf band occupancies in transition metals, rare earths etc. CP measurements are reported for Ni,αMn andβMn and then the new scheme is applied to obtain 3d occupancies in these systems. Some comments on the use of this method for other systems are also made.
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By
Valsakumar, M C; Kumar, Vijay
20 Citations
We present a general formalism for diffraction from a onedimensional quasicrystal with arbitrary length scales and sequences. The notion of subquasilattices is introduced and the effect of different basis on different sites is studied. The relevance of this work for the study of vibrational and electronic spectra of the chain is discussed.
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