We present the results of an analysis of the prompt gamma-ray emission from GRB 090618 using the RT -2 Experiment onboard the Coronas − P hoton satellite. GRB 090618 shows multiple peaks and a detailed study of the temporal structure as a function of energy is carried out. As the GRB was incident at an angle of 77 • to the detector axis, we have generated appropriate response functions of the detectors to derive the spectrum of this GRB. We have augmented these results using the publicly available data from the Swif t BAT detector and show that a combined spectral analysis can measure the spectral parameters quite accurately. We also attempt a spectral and timing analysis of individual peaks and find evidence for a systematic change in the pulse emission characteristics for the successive pulses. In particular, we find that the peak energy of the spectrum, E p , is found to monotonically decrease with time, for the successive pulses of this GRB.
A simple chalcone based fluorescent chemosensor 1, capable of detecting Fe3+ in aqueous media, has been designed and synthesized by the condensation of 3-formyl-2-hydroxyquinoline and acetophenone.
In this work, we propose a method to quantify the density of interfacial states at the oxide/semiconductor interface using only Hall concentration and low frequency capacitance-voltage data. We discuss the advantages of the proposed method over commonly used admittance techniques in characterizing highly disordered interfaces between the high-k dielectric and high mobility substrates. This gated Hall method is employed to characterize high-k/IIIV interface quality in metal-oxide semiconductor high electron mobility transistor structures with high mobility InGaAs channels.
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