Role of guard rings in improving the performance of silicon detectorsSpringer Science and Business Media LLC - Tập 65 - Trang 259-272 - 2005
Vijay Mishra, V. D. Srivastava, S. K. Kataria
BARC has developed large-area silicon detectors in collaboration with BEL to be used in the pre-shower detector of the CMS experiment at CERN. The use of floating guard rings (FGR) in improving breakdown voltage and reducing leakage current of silicon detectors is well-known. In the present work, it has been demonstrated that FGRs can also be used to improve the spectroscopic response of silicon d...... hiện toàn bộ
Application of Tietz potential to study optical properties of spherical quantum dotsSpringer Science and Business Media LLC - Tập 85 - Trang 723-737 - 2015
R KHORDAD, B MIRHOSSEINI
In this work, we study the optical properties of spherical quantum dots by using Tietz potential. In this regard, we have applied Nikiforov–Uvarov (NU) technique and numerically solved the Schrödinger equation to obtain energy levels and wave functions. Then, by using the density matrix method, we have derived expressions for the changes in linear and third-order nonlinear absorption coefficients ...... hiện toàn bộ
Nonequilibrium noise and instabilities in membranes with active pumpsSpringer Science and Business Media LLC - Tập 53 - Trang 237-242 - 1999
Sriram Ramaswamy, John Toner, Jacques Prost
We study the statistical properties and dynamics of flexible fluid membranes containing active transmembrane proteins and find that such active membranes can be either stable or unstable to small disturbances, depending on the signs of certain crucial parameters characterising the protein-membrane interaction. A major finding is that the shape-fluctuation spectrum in the stable case for a zero-ten...... hiện toàn bộ
Hypersurface-homogeneous Universe filled with perfect fluid in f(R, T) theory of gravitySpringer Science and Business Media LLC - Tập 87 - Trang 1-6 - 2016
A Y SHAIKH, S D KATORE
The exact solutions of the field equations with respect to hypersurface-homogeneous Universe filled with perfect fluid in the framework of f(R, T) theory of gravity (Harko et al, Phys. Rev. D
84, 024020 (2011)) is derived. The physical behaviour of the cosmological model is studied.
What have we learnt from Wilkinson microwave anisotropy probe?Springer Science and Business Media LLC - Tập 63 - Trang 829-836 - 2004
Robert G. Crittenden
It has been a little over a year since WMAP produced its dramatic new glimpse of the cosmic microwave background. I review the results of the WMAP mission and the science that has arisen from it, focusing on the qualitatively new features of the data: the temperature-polarization correlation, correlations with large scale structure, the large-scale power deficit and its implications, and the searc...... hiện toàn bộ
Problems with tunneling of thin shells from black holesSpringer Science and Business Media LLC - Tập 70 - Trang 3-26 - 2008
Borun D. Chowdhury
It is shown that exp(−2 Im(∫ p dr)) is not invariant under canonical transformations in general. Specifically for shells tunneling out of black holes, this quantity is not invariant under canonical transformations. It can be interpreted as the transmission coefficient only in the cases in which it is invariant under canonical transformations. Although such cases include alpha decay, they do not in...... hiện toàn bộ
Growth of zinc oxide nanostructuresSpringer Science and Business Media LLC - Tập 65 - Trang 809-814 - 2005
K. Sreenivas, Sanjeev Kumar, Jaya Choudhary, Vinay Gupta
Zinc oxide (ZnO) nanowhiskers have been prepared using a multilayer ZnO(50 nm)/Zn(20 nm)/ZnO(2μm) structure on a polished stainless steel (SS) substrate by high rate magnetron sputtering. The formation of uniformly distributed ZnO nanowhiskers with about 20 nm dia. and 2 to 5 μm length was observed after a postdeposition annealing of the prepared structure at 300–400° C. An array of highlyc-axis o...... hiện toàn bộ