Enhanced Fission Probability of Even-Z Fragments in the Decay of Hot and Rotating 210Rn* Compound System

Mass and charge distribution of the cross-section for the fission fragments obtained in the decay of hot and rotating compound system formed in the reaction 48Ca + 162Dy → 210Rn* at an incident energy 139.6 MeV has been calculated using the dynamical cluster-decay model. Isotopic composition for each element belonging to the symmetric mass region has been obtained. The shell closure at N=50 for light and at Z=50 for heavy mass binary fragments gives a deep minima in the fragmentation potential at touching configuration and governs the fission partition of the compound system. The fission fragments of the symmetric mass region have their dominating presence along with strong odd-even staggering i.e., even-Z fission fragments are more probable than the odd ones, similar to the observed trends of the yield

Characterization of color cross-talk of CCD detectors and its influence in multispectral quantitative phase imaging

Multi-spectral quantitative phase imaging (QPI) is an emerging imaging modality for wavelength dependent studies of several biological and industrial specimens. Simultaneous multi-spectral QPI is generally performed with color CCD cameras. However, color CCD cameras are suffered from the color crosstalk issue, which needed to be explored. Here, we present a new approach for accurately measuring the color crosstalk of 2D area detectors, without needing prior information about camera specifications. Color crosstalk of two different cameras commonly used in QPI, single chip CCD (1-CCD) and three chip CCD (3-CCD), is systematically studied and compared using compact interference microscopy. The influence of color crosstalk on the fringe width and the visibility of the monochromatic constituents corresponding to three color channels of white light interferogram are studied both through simulations and experiments. It is observed that presence of color crosstalk changes the fringe width and visibility over the imaging field of view. This leads to an unwanted non-uniform background error in the multi-spectral phase imaging of the specimens. It is demonstrated that the color crosstalk of the detector is the key limiting factor for phase measurement accuracy of simultaneous multi-spectral QPI systems.Comment: 16 pages, 8 figure

Self injection of Dichlorvos, an Organophosphorus Compound

We report two patients who injected themselves a strong organophosphate compound, dichlorvas, and showed the typical clinical picture of organophosphate intoxication. There are very few case reports of parenteral organophosphorous poisoning. With the appropriate therapy, their symptoms disappeared in a few days. The cases are reported because of unusual and interesting way of intoxication

Collective clusterization effects in light heavy ion reactions

The collective clusterization process, proposed for intermediate mass fragments (IMFs, 4$<$A$\le$28, 2$<$Z$\le$14) emitted from the hot and rotating compound nuclei formed in low energy reactions, is extended further to include also the emission of light particles (LPs, A$\le$4, Z$\le$2) from the fusion-evaporation residues. Both the LPs and IMFs are treated as the dynamical collective mass motion of preformed clusters through the barrier. Compared to IMFs, LPs are shown to have different characteristics, and the predictions of our, so-called, dynamical cluster-decay model are similar to those of the statistical fission model.Comment: 4 pages, 3 figures, Conferenc

Influence of laser spot size at diffuser plane on the longitudinal spatial coherence function of optical coherence microscopy system

Coherence properties and wavelength of light sources are indispensable for optical coherence microscopy/tomography as they greatly influence the signal to noise ratio, axial resolution, and penetration depth of the system. In the present letter, we investigated the longitudinal spatial coherence properties of the pseudo-thermal light source (PTS) as a function of spot size at the diffuser plane, which is controlled by translating microscope objective lens towards or away from the diffuser plane. The axial resolution of PTS is found to be maximum ~ 13 microns for the beam spot size of 3.5 mm at the diffuser plane. The change in the axial resolution of the system as the spot size is increased at the diffuser plane is further confirmed by performing experiments on standard gauge blocks of height difference of 15 microns. Thus, by appropriately choosing the beam spot size at the diffuser plane, any monochromatic laser light source depending on the biological window can be utilized to obtain high axial-resolution with large penetration depth and speckle-free tomographic images of multilayered biological specimens irrespective of the source temporal coherence length. In addition, PTS could be an attractive alternative light source for achieving high axial-resolution without needing chromatic aberration corrected optics and dispersion-compensation mechanism, unlike conventional setups.Comment: 11 pages, 4 figures. arXiv admin note: text overlap with arXiv:1810.0199

Human amniotic membrane as a homograft material in myringoplasty

To evaluate the efficacy of preserved human amniotic membrane as an alternative graft material in terms of its anatomical and functional outcomes in closing tympanic membrane defects during myringoplasties. We also compared it with the standard temporal fascia graft. A prospective review of 50 cases operated for tympanic membrane defects in Hospital University Sains Malaysia from June 1999 to June 2001. Twenty cases used preserved human amniotic membrane and 30 cases used temporal fascia graft. Clinical and audiometric assessment were done 3 months postoperatively. During a period 2 years, a total of 50 ears with tympanic membrane perforations were operated, out of this 28 were males and the remaining 22 were females. The age range was between 10 to 70 years with a mean age of 32.08 years. The operations were carried out by senior surgeons in the department. The surgical approach was either permeatal, endaural or postaural but the technique was limited to underlay or pop in through perforation. Postoperative results were evaluated with respect to the anatomical and functional outcomes. To assess anatomic results, we took into account successful closures, presence of residual perforations, infections, graft dislodgment and lateralization. In the temporal fascia group, successful closure were achieved in 17 (56.7o/o) of 30 cases. Among the 13 failures (43.3%), 6 were due to residual perforation, 4 infections, 2 graft dislodgment and one lateralization. In the human amniotic membrane group, successful closure were achieved in 13 (65%) of 20 cases. Among the 7 failures (35o/o), 4 were residual perforations, 2 due to infection and one graft lateralization. In the evaluation of the functional outcomes, both groups showed significant difference between pre and postoperative mean air conduction thresholds component of hearing. However, a significant closure of air-bone gap was only observed in the human amniotic membrane group. Human amniotic membrane is a simple, safe and cost effective technique for repairing perforated tympanic membranes. It gives good anatomic and functional results and is comparable to the standard temporal fascia graft material so widely used today