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The existence of neutron magic number 184 is demonstrated through the cluster decay studies. The alpha and black cluster radioactivity have been studied in the superheavy region [Formula: see text] using modified generalized liquid drop... more
The existence of neutron magic number 184 is demonstrated through the cluster decay studies. The alpha and black cluster radioactivity have been studied in the superheavy region [Formula: see text] using modified generalized liquid drop model (MGLDM). The values obtained from this work were compared with that of experiments. During the study of black cluster radioactivity, surprisingly it is observed that the shortest half-lives of cluster decay in all superheavy elements are observed for daughter neutron number 184 and nearly equal to that. This is a clear evidence for the existence of the neutron magic number [Formula: see text]. This study is useful in the understanding of superheavy element nuclei structure.
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Aluminium is chemically active metal that owes its stability and corrosion resistance to an ever present protective film of oxide. It is well known that Cu-Al2O3 composite materials have high potential for use in structural applications... more
Aluminium is chemically active metal that owes its stability and corrosion resistance to an ever present protective film of oxide. It is well known that Cu-Al2O3 composite materials have high potential for use in structural applications in which enhanced mechanical characteristics are required. There fore,oxidized copper is mixed with aluminium powder in a pot mill and sintered at elevated temperature of 550 0 C. Copper composite with varying amount of 9%,11%,13 % by weight of alumina was used to fabricate compact using powder metallurgy route. The blended powder was compacted at optimized load to produce compact of h/d ratio in range of 1.0 / 1.1 and then sintered at a temperature of 550 0 C for 1 1/2 Hours. Green density, sintered density, mechanical properties like hardness, compression test are estimated. The investigation shows that Al and Al matrix composites offer lower density, improved strength and stiffness and wear resistance. The compacts are extruded for further investi...
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M.G.Srinivas1, H.C.Manjunatha2*, K.N.Sridhar3, N.Sowmya2, Alfred Cecil Raj4 1Department of Physics, Government First Grade College, Mulbagal-563131 Karnataka, INDIA 2Department of Physics, Government College for Women, Kolar-563101... more
M.G.Srinivas1, H.C.Manjunatha2*, K.N.Sridhar3, N.Sowmya2, Alfred Cecil Raj4 1Department of Physics, Government First Grade College, Mulbagal-563131 Karnataka, INDIA 2Department of Physics, Government College for Women, Kolar-563101 Karnataka, INDIA 3Department of Physics, Government First Grade College, Kolar-563101 Karnataka, INDIA 4Department of Physics, St.Joseph's college (autonomous), Thiruchirapalli, Tamilnadu, India
Nanospace Technologies is an industry –leading Nano crystalline materials innovator and also manufacturing the integrated family using nanomaterial technologies. The entire preparation and commercial manufacturing of nanopowder Metal... more
Nanospace Technologies is an industry –leading Nano crystalline materials innovator and also manufacturing the integrated family using nanomaterial technologies. The entire preparation and commercial manufacturing of nanopowder Metal oxides i.e. Aluminium Oxide, Zinc Oxide, Calcium Oxide, Titanium Di oxide and several, having main focus on Nanophase of Nanotechnology. Nanophase produces the nano material products for a variety of markets like anti microbial products, ultra-fine polishing applications, semiconductors wafers, hard disk drives, optics, wood preservation, antifouling, fuel cells, UV attenuation and resistant coatings etc. but still Nanotechnology oriented markets are constantly developing . The main aim is to provide the understanding of procedure at the nanoscale. Focus lies on methods that enable to understand the problems on 1) the Nanoscale mechanical behaviour of materials 2) the mechanical behaviour of nanostructures.
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The present work used eight different proximity functions in the modified liquid drop model [MGLDM] to study the cluster and alpha decay half-lives in the superheavy nuclei Z = 120. The values produced by the present work are compared... more
The present work used eight different proximity functions in the modified liquid drop model [MGLDM] to study the cluster and alpha decay half-lives in the superheavy nuclei Z = 120. The values produced by the present work are compared with experiments. We have explored the proximity function is suitable in MGLDM for the cluster and alpha radioactivity of superheavy nuclei. The present work is useful in the study of decay modes of superheavy nuclei Z = 120.
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2-Amino-5-nitropyridinium halides (2A5NPBr)/(2A5NPCl) were synthesized by dissolving 2-amino-5-nitropyridine in hydrobromic/hydrochloric acid. Nanoparticles of 2A5NPBr and 2A5NPCl were attained by hydrothermal method. For comparison and... more
2-Amino-5-nitropyridinium halides (2A5NPBr)/(2A5NPCl) were synthesized by dissolving 2-amino-5-nitropyridine in hydrobromic/hydrochloric acid. Nanoparticles of 2A5NPBr and 2A5NPCl were attained by hydrothermal method. For comparison and estimation of mechanical properties, single crystals of the samples were grown by slow evaporation process. SEM analysis shows the formation of nanoparticles of 2A5NPBr and 2A5NPCl with average grain size of 50 and 100[Formula: see text]nm, respectively. UV-Vis analysis reveals that the materials possess low cut-off wavelength and a wide optical transmission window. By Vickers test, the Meyer index (n) was estimated to be 1.33 for 2A5NPBr and 2.49 for 2A5NPCl crystals. The SHG efficiency of 2A5NPBr and 2A5NPCl nanoparticles was calculated to be 1.5 and 4.3 times that of well known NLO material KDP. The role of cations in demonstrating the desired NLO properties were discussed in detail.
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ZnS -MnS nano composite has been prepared through a chemical route, namely the microwave assisted solvothermal method. The nano structure of the prepared nano particles have been analyzed using X-ray diffraction (XRD), scanning electron... more
ZnS -MnS nano composite has been prepared through a chemical route, namely the microwave assisted solvothermal method. The nano structure of the prepared nano particles have been analyzed using X-ray diffraction (XRD), scanning electron microscope (SEM).Conductivity and Impedance measurements were carried out on the pelletized sample‥ The sizes of as prepared nano particles are found to be in 1– 6nm
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ZnS-MgS nanocomposites was successfully prepared by the microwave assisted solvothermal method using a domestic microwave oven. The prepared sample was annealed at 100 °C for 1 hr to improve the ordering. Grain sizes and lattice... more
ZnS-MgS nanocomposites was successfully prepared by the microwave assisted solvothermal method using a domestic microwave oven. The prepared sample was annealed at 100 °C for 1 hr to improve the ordering. Grain sizes and lattice parameters were determined by carrying out X-ray powder diffraction measurements. Scanning electron microscopy (SEM) shows the morphology. AC electrical measurements were carried out on pelletised samples at various temperatures ranging from 40-150 °C. Results of the present study reveal that the space charge contribution plays a significant role in the charge transport process and polarizability.
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Nonlinear optical single crystal of L-Proline trichloroacetate (L-PTCA) was successfully grown by Slow Evaporation Solution Technique (SEST). The grown crystals were subjected to single crystal X-ray diffraction analysis to confirm the... more
Nonlinear optical single crystal of L-Proline trichloroacetate (L-PTCA) was successfully grown by Slow Evaporation Solution Technique (SEST). The grown crystals were subjected to single crystal X-ray diffraction analysis to confirm the structure. From the single crystal XRD data, solid state parameters were determined for the grown crystal. The crystalline perfection has been evaluated using high resolution X-ray diffractometer. The frequencies of various functional groups were identified from FTIR spectral analysis. The percentage of transmittance was obtained from UV Visible spectral analysis. TGA-DSC measurements indicate the thermal stability of the crystal. The dielectric constant, dielectric loss and ac conductivity were measured by the impedance analyzer. The DC conductivity was calculated by the cole-cole plot method.
Research Interests: Mathematics, Materials Science, Chemistry, Analytical Chemistry, Spectroscopy, and 15 moreNonlinear dynamics, Crystallization, Medicine, DIELECTRIC, Temperature, Proline, Phase transition, X ray diffraction, Particle Size, Single Crystal, Fourier transform infrared spectroscopy, Molecular Conformation, Elsevier, Electric Impedance, and Optical Phenomena
A nonlinear optical 3-Hydroxy anthranilic acid (3-HAA) is synthesized and a single crystal is grown by slow evaporation method. The structural perfection of the grown crystal is predicted by the powder X-ray diffraction analysis. The... more
A nonlinear optical 3-Hydroxy anthranilic acid (3-HAA) is synthesized and a single crystal is grown by slow evaporation method. The structural perfection of the grown crystal is predicted by the powder X-ray diffraction analysis. The presence of functional group is confirmed by Fourier transform infrared (FTIR) spectroscopy. The dielectric behavior of the grown crystal is analyzed for different frequencies for
Research Interests: Materials Engineering, Materials Science, Crystallography, Nonlinear Optics, FTIR spectroscopy, and 13 moreEvaporation, Manufacturing Engineering, DIELECTRIC, Diffraction, Powder X-Ray Diffraction, Fourier transform, Single Crystal, Fourier transform infrared spectroscopy, Electrical Properties, New materials and manufacturing processes for aero engines, Functional Group, Amino Acid Profile, and Fourier transform infrared
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We have studied proton radioactivity of heavy nuclei of atomic number range 72 < Z < 88. We have calculated the energy released during the proton decay (QP) and half-lives of proton decay. To study the competition between different... more
We have studied proton radioactivity of heavy nuclei of atomic number range 72 < Z < 88. We have calculated the energy released during the proton decay (QP) and half-lives of proton decay. To study the competition between different decay modes, we have compared the proton decay half lives with that of the decay modes such as alpha decay, beta decay, cluster decay and spontaneous fission. To check the Geiger–Nuttall law for proton decay, we have plotted the logarithmic proton decay half-lives versus 1/sqrt(Q). We have also highlighted possible proton emitters with the corresponding energies and half-lives in the atomic number range 72 < Z < 88.
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This work focuses on the gamma/X-ray and neutron shielding properties of silicon–germanium alloys in different compositions such as Si0.1Ge0.9 (SG1), Si0.2Ge0.8, Si0.4Ge0.6, Si0.6Ge0.4, Si0.8Ge0.2, and Si0.9Ge0.1. Among all the selected... more
This work focuses on the gamma/X-ray and neutron shielding properties of silicon–germanium alloys in different compositions such as Si0.1Ge0.9 (SG1), Si0.2Ge0.8, Si0.4Ge0.6, Si0.6Ge0.4, Si0.8Ge0.2, and Si0.9Ge0.1. Among all the selected alloys, SG1 has less half-value thickness, tenth-value thickness, and penetration depth, whereas specific gamma-ray constant, Zeff, electron density, radiation protection efficiency, and kinetic energy released in matter have larger values compared to the other studied alloys. The neutron shielding parameters, such as coherent neutron scattering length, incoherent neutron scattering length, coherent neutron scattering cross-section, and incoherent neutron scattering cross-sections are smaller for the SG1 alloy than the other studied alloys. Furthermore, total neutron scattering cross-section and neutron absorption cross-section are found to be larger for SG1 than the other studied alloys. Based on gamma/X-ray and neutron shielding parameter analysis,...
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Single crystals of cadmium oxalate dehydrate in the presence of sodium were grown first time by silica gel medium at room temperature. The crystalline nature of the material was confirmed by Single Crystal X-ray diffraction... more
Single crystals of cadmium oxalate dehydrate in the presence of sodium were grown first time by silica gel medium at room temperature. The crystalline nature of the material was confirmed by Single Crystal X-ray diffraction analysis.UV-Vis Analysis was carried out to find the optical transmittance of the material. The presence of functional group was confirmed by Fourier Transform-Infrared analysis and Second Harmonic Generation efficiency of the grown crystals were found to be greater than that of KDP.
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Abstract The current study involves the X-ray/gamma and neutron shielding properties of selected lead based binary/tertiary/quaternary alloys such as Foundary type, Lino type, Molybdochalkos, Mono type, Stereo type, Turne type, Type metal... more
Abstract The current study involves the X-ray/gamma and neutron shielding properties of selected lead based binary/tertiary/quaternary alloys such as Foundary type, Lino type, Molybdochalkos, Mono type, Stereo type, Turne type, Type metal and Woods metal. The X-ray/gamma and neutron shielding parameters are studied in detail for all the selected alloys. Among all the selected alloys, Molybdochalkos shows larger values of mass attenuation coefficient (MAC), absorption buildup factor (ABF), Zeff, Ne, specific absorbed fractions of energy (SAFE), radiation protection efficiency (RPE), kinetic energy released in matter (KERMA) and relative dose. Furthermore, neutron total interaction cross section (σtot) and absorption cross section (σab) values are also larger. This clearly indicates that Molybdochalkos binary alloy is the good absorber of both X-ray/gamma and neutrons.
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Single crystals of Calcium Barium Oxalate of size 0.15X0.20X0.25mm were crystallized by gel growth technique. The powder X-ray diffraction analysis revealed that the mixed grown crystals belong to monoclinic system. Prismat ic and platy... more
Single crystals of Calcium Barium Oxalate of size 0.15X0.20X0.25mm were crystallized by gel growth technique. The powder X-ray diffraction analysis revealed that the mixed grown crystals belong to monoclinic system. Prismat ic and platy shaped of well fascinated crystals were character ized and reported by FTIR, XRD, EDAX and TGA/DTA. Key words— Calcium Chloride, Barium Chloride, Oxalic Acid and Sodium Meta Silicate, XRD, FTIR, EDAX, TGA/DTA.
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Abstract The half-lives of one-proton emitters in the actinide region are presented using the coulomb and proximity potential method. The studied proton decay half-lives are compared with that of other decay modes such as alpha decay,... more
Abstract The half-lives of one-proton emitters in the actinide region are presented using the coulomb and proximity potential method. The studied proton decay half-lives are compared with that of other decay modes such as alpha decay, spontaneous fission and beta decay. We have identified proton emitters in the actinide region and also it is the competing decay mode for all the observed proton emitters. We have included the effects of deformations in the present study. One-proton decay half-lives of present study have shown good agreement with the available experimental values.
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Objective: The aim of this study is to investigate the growth, structure, spectral, solubility and biological activity of sodium cadmium oxalate dehydrate (NaCdOx) and cadmium oxalate trihydrate (CdOx) crystals prepared by a single... more
Objective: The aim of this study is to investigate the growth, structure, spectral, solubility and biological activity of sodium cadmium oxalate dehydrate (NaCdOx) and cadmium oxalate trihydrate (CdOx) crystals prepared by a single diffusion method in the silica gel medium.Methods: The present crystals were grown using single diffusion methods and tested for XRD, UV absorption (190 to 1100 mm) and solubility (distilled water at 20-29 °C) studies. The antimicrobial efficacy of the grown samples at various concentrations (25, 50, 75 and 100 μg/ml) was studied against Streptococcus, (G+Ve), Pseudomonas aeruginosa (G-Ve) and Candida albicans (antifungal). The cytotoxicity evolution was carried out against human cervical cancer cell line (HeLa) using MTT assays.Results: The existing single crystals were successfully grown by silica gel technique. The solubility of sodium cadmium oxalate dehydrate (NaCdOx) was moderately good in deionized warm water. The FTIR spectral studies confirmed th...
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Objective: The aim of this study is to evaluate the biological potentials of sodium cadmium oxalate dihydrate complex prepared by a single diffusion method in the silica gel medium. Methods: The present complex was derived by the oxalic... more
Objective: The aim of this study is to evaluate the biological potentials of sodium cadmium oxalate dihydrate complex prepared by a single diffusion method in the silica gel medium. Methods: The present complex was derived by the oxalic acid using a single diffusion method in gel medium and tested for single-crystal X-ray diffraction, ultraviolet-visible (UV) spectrum (190–500 mm), and solubility (distilled water at 20–29°C) studies. Antioxidant activity was determined by 2, 2-diphenyl-1-picrylhydrazyl assay, and antimicrobial activity was measured by agar well diffusion method. Results: The present chelating complex was successfully synthesized by gel technique. The solubility of sodium cadmium oxalate dihydrate was moderately good for deionized warm water. The UV spectral studies confirmed the chelating O-H, Na-O, and C-O bonds of the newly synthesized complex for the optical and biological properties. Conclusions: The metal-oxygen and oxygen-hydrogen bonds of the present newly sy...
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The charge density wave (CDW) in the layered compound 2H-TaSe 2 at low temperatures has a commensurate phase, which causes super lattice points to appear in the Brillöuin zone of the undistorted phase. A Born-von Karman formalism has been... more
The charge density wave (CDW) in the layered compound 2H-TaSe 2 at low temperatures has a commensurate phase, which causes super lattice points to appear in the Brillöuin zone of the undistorted phase. A Born-von Karman formalism has been employed for the calculation of phonon frequency distribution curves of 2H-TaSe 2 both in the normal and in the commensurate charge density wave (CCDW) phases. A folding technique has been adopted for the calculation in the CCDW phase. The phonon distribution for both the phases have been reported. With these distributions the thermal properties such as specific heat capacity, Debye Waller factor W(k) and thermal conductivity have been worked out, and compared with the available experimental results.
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In the title compounds, 4-aminopyridinium 4-aminobenzoate dihydrate, C(7)H(6)NO(2)(-).C(5)H(7)N(2)(+).2H(2)O, (I), and 4-aminopyridinium nicotinate, C(5)H(7)N(2)(+).C(6)H(4)NO(2)(-), (II), the aromatic N atoms of the 4-aminopyridinium... more
In the title compounds, 4-aminopyridinium 4-aminobenzoate dihydrate, C(7)H(6)NO(2)(-).C(5)H(7)N(2)(+).2H(2)O, (I), and 4-aminopyridinium nicotinate, C(5)H(7)N(2)(+).C(6)H(4)NO(2)(-), (II), the aromatic N atoms of the 4-aminopyridinium cations are protonated. In (I), the asymmetric unit is composed of two 4-aminopyridinium cations, two 4-aminobenzoate anions and four water molecules, and the compound crystallizes in a noncentrosymmetric space group. The two sets of independent molecules of (I) are related by a centre of symmetry which is not part of the space group. In (I), the protonated pyridinium ring H atoms are involved in bifurcated hydrogen bonding with carboxylate O atoms to form an R(1)(2)(4) ring motif. The water molecules link the ions to form a two-dimensional network along the (101) plane. In (II), an intramolecular bifurcated hydrogen bond generates an R(1)(2)(4) ring motif and inter-ion hydrogen bonding generates an R(4)(2)(16) ring motif. The packing of adduct (II) is consolidated via N-H...O and N-H...N hydrogen bonds to form a two-dimensional network along the (102) plane.
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The Charge Density Wave (CDW) in the layered compound 1T-TaSe 2 at low temperatures has a commensurate phase which causes superlattice points to appear in the Brillouin zone of the undistorted phase. The phonon frequency distribution of... more
The Charge Density Wave (CDW) in the layered compound 1T-TaSe 2 at low temperatures has a commensurate phase which causes superlattice points to appear in the Brillouin zone of the undistorted phase. The phonon frequency distribution of this system for both the normal ...
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The crystal lattice plays an essential role in the charge density wave (CDW) phase transition together with the electron system through electronphonon interactions. The CDW in the layered compound 1T-TaS2 at low temperatures has a... more
The crystal lattice plays an essential role in the charge density wave (CDW) phase transition together with the electron system through electronphonon interactions. The CDW in the layered compound 1T-TaS2 at low temperatures has a commensurate phase, which ...
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Research Interests: Physics, Chemistry, Crystallography, Medicine, Chloride, and 5 moreCobalt, Hydrogen Bond, CHEMICAL SCIENCES, Ion, and Tetra
... C Kalai Arasi1, R John Bosco Balaguru2, S Alfred Cecil Raj1 and N Lawrence1 ... has been computed by two-body central potential by using transition metal model potential approach of Animalu [12] and a short-range three-body... more
... C Kalai Arasi1, R John Bosco Balaguru2, S Alfred Cecil Raj1 and N Lawrence1 ... has been computed by two-body central potential by using transition metal model potential approach of Animalu [12] and a short-range three-body interaction following Upadhaya and Prakash [13]. ...