Ananda Mohan College

About: Ananda Mohan College is a based out in . It is known for research contribution in the topics: Excited state & Phosphorus deficiency. The organization has 30 authors who have published 76 publications receiving 625 citations.

Development of a photo-catalytic converter for potential use in the detoxification of Cr(VI) metal in water from natural resources

Abstract: Porphyrin dye sensitized nanomaterials (nanohybrids) are advantageous for application in photocatalysis due to their additional absorption band that matches the solar irradiance spectrum. Here we have impregnated protoporphyrin IX with copper(II) ions and sensitized porous TiO2 microspheres (∼1.5 μm in diameter) in order to synthesize a functional nanohybrid for application in visible light photocatalysis. While electron microscopy studies (FESEM and HRTEM) confirm the inorganic porous structure of the microspheres, Fourier transform infrared (FTIR), electronic spectroscopy and picosecond resolved fluorescence studies on the sensitizing PP molecules reveal the formation of the functional nanohybrid. Hexavalent chromium (Cr(VI)) in the aquatic environment is a commonly identified proven carcinogenic heavy metal pollutant, whereas Cr(III) is nontoxic and considered to be an essential nutrient for living organisms. We have applied the nanohybrid for an efficient reduction of toxic Cr(VI) metal ions to non-toxic Cr(III) in water under visible light illumination. The advantage of the Cu ion impregnation into the sensitizing PP dye is evident from the intact efficacy in the photocatalytic reduction in the presence of water dissolved metal ions (Cr3+ and Fe3+) is confirmed from our study. On the other hand, the nanohybrid without the Cu(II) suffers from interference from other dissolved metal ions during the photocatalytic reduction process. For a prototype application, we have developed an active filter (having physical and chemical filtering capability) by depositing the nanohybrid on an extended surface of a stainless-steel metal mesh (size 2 cm × 2 cm, pore size 150 μm × 200 μm). The prototype active filter exhibits significant potential for chemical filtering of toxic Cr(VI) ions (photoreduction to Cr(III)) along with physical cleaning of suspended particulates present in water.

Observation of antimagnetic rotation in **108Cd

Abstract: High spin levels in $^{108}\mathrm{Cd}$ have been populated through $^{100}\mathrm{Mo}(^{13}\mathrm{C},5n\ensuremath{\gamma})^{108}\mathrm{Cd}$ reaction using a 65 MeV $^{13}\mathrm{C}$ beam. The lifetime of the ${14}^{+},{16}^{+},{18}^{+}$, and ${20}^{+}$ levels of the positive parity yrast band of $^{108}\mathrm{Cd}$ have been measured using the Doppler shift attenuation method. The evaluated B(E2) values from the measured lifetimes have been compared with the B(E2) values calculated using the semiclassical model, which assume shears mechanism, and the values obtained from total Routhian surface (TRS) calculations. Both calculations show good agreement with the measured values. In addition, the large ${\mathcal{J}}^{(2)}/B(E2)$ ratio may indicate that a large contribution to the angular momentum of this band is generated by shears mechanism. Thus, the present work indicates that the states of the positive parity yrast band from ${16}^{+}$ onwards in $^{108}\mathrm{Cd}$, originate due to antimagnetic rotation.

Exploring the Origin of Nearly Degenerate Doublet Bands in Ag 106

Abstract: The lifetimes of the excited levels for the two nearly degenerate bands of $^{106}\mathrm{Ag}$ have been measured using the Doppler-shift attenuation method. The deduced $B(E2)$ and $B(M1)$ rates in the two bands are found to be similar, except around the band crossing spin, while their moments of inertia are quite different. This is a novel observation for a nearly degenerate doublet band.