M. M. Sharma

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The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. For spherical nuclei close to the dripline the statistical model (Hauser-Feshbach) approach is not applicable and direct contributions may dominate the cross sections. For neutron-rich, even-even Sn targets, we compare the resulting neutron capture(More)
This paper describes the parametric study of a novel rectangular planar ultra-wide band antenna (UWB). The proposed design exploits U and T-shaped notches with stairs at two corners on the radiating patch along with stepped microstrip feed. The stairs are also used at the corners of the partial ground plane with a rectangular notch and an(More)
Design and performance of an ultra-wide band truncated rectangular monopole antenna with band-notched characteristics is presented in this paper. In the proposed antenna, split ring resonator (SRR) is etched inside the truncated rectangular patch of the monopole antenna to achieve band-notch operation. The achieved impedance bandwidth of antenna is from(More)
The importance of direct capture for (n,γ)–reactions on intermediate– and heavy–mass target nuclei occuring in the s– and r–process is investigated. It is shown that the direct mechanism is non–negligible for magic and neutron rich target nuclei. For some double magic and neutron rich nuclei in the r–process direct capture is even the dominant reaction(More)
We have made a detailed study of the ground-state properties of nuclei in the light mass region with atomic numbers Z=10-22 in the framework of the relativistic mean-field (RMF) theory. The nonlinear σω model with scalar self-interaction has been employed. The RMF calculations have been performed in an axially deformed configuration using the force NL-SH.(More)
The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. We calculate direct neutron capture on the even-even isotopes 124−145 Sn and 208−238 Pb with energy levels, masses, and nuclear density distributions taken from different nuclear-structure models. The utilized structure models are a(More)
In this paper a full composite fractal antenna, having a modified Sierpinski fractal antenna with 50-Ω microstrip line, used for dual band wireless applications. The S11 parameter and radiation characteristics of the antenna design indicate that a Sierpinski fractal antenna with circular slot having Dual Band frequency bandwidth from 3.8 GHz to 4.4(More)
A dual band circularly polarized single-feed microstrip antenna for wireless communication systems is proposed here and its performance is tested in free space. This modified rectangular microstrip antenna having one protruded curved edge is simulated by using the IE3D simulation software. In between conducting patch and ground plane, designed antenna has(More)
In this paper, a double-layered frequency selective surface(FSS) superstrate was proposed. The unit cell of the proposed FSS consists of a square slot and a Jerusalem cross structure, which are printed on two sides of the substrate. It is designed on the FR4 dielectric substrate with a relative permittivity of 4.8, loss tangent 0.025 and a thickness of 1.6(More)
This paper presents a compact frequency selective surface (FSS) based band-stop spatial filter for WLAN application which can be useful for modern communication system. The proposed structure is designed on PTFE substrate which have exceptional weather and heat resistance with excellent insulator characteristics. It is a single sided metallic square patch(More)