Electron ionization cross sections for neutral fullerene C70

Pal, Suresh; Anshu,; Kumar, Neeraj

doi:10.1007/s12648-011-0193-5

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Keeping in view that the electrons in the exit channel are indistinguishable, there is equal probability of transfer of maximum primary electron energy ( E – I i ) to the secondary electron; hence, limits of integration over ε in eqs and become 0 to ( E – I i ). Taking into account the same concept, Pal and co-workers − employed this revisited approach to calculate the partial single-differential cross sections (as a function of secondary/ejected electron energy at fixed impinging electron energies), double-differential cross sections (as a function of secondary/ejected electron energy and the scattering angle at fixed impinging electron energies), and the integral partial and total ionization cross sections (as a function of incident electron energies for various types of molecules varying from diatomic to polyatomic molecules including the Bückminster fullerenes). − …”

Section: Theorymentioning

confidence: 99%

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Pal¹,

Kumar²,

Singh³

et al. 2019

J. Phys. Chem. A

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We describe the recent progress in the development of the semiempirical approach developed by Jain and Khare for the calculations of ionization cross sections for molecules by electron impact. Along with the state-of-the-art description of this approach, the emphasis will be on the evaluation of cross sections for a carbon dimer, C2, and trimer, C3. Single-differential ionization cross sections as a function of secondary or ejected electron energy and averaged secondary electron energy for C2 and C3 are calculated at fixed impinging electron energies of 100 and 200 eV. The integral ionization cross sections are also derived from ionization threshold to 2000 eV. Extensive comparisons of the presently evaluated direct ionization cross sections with the only available theoretical binary-encounter-dipole model calculations of Kim and Rudd, spherical-complex-optical-potential model calculations of Nagama and Antony, DM model calculations of Deutsch and Märk, and the calculations of Michelin et al. based on the combination of the Schwinger variational iterative method and distorted wave approximation revealed a satisfactory agreement. The present study also establishes the validity of the semiempirical approaches and so provides a solid foundation for further applications to the larger molecules.

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Section: Theorymentioning

confidence: 99%

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Pal¹,

Kumar²,

Singh³

et al. 2019

J. Phys. Chem. A

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“…Several researchers [3][4][5][6][7][8][9][10] carried out ultrasonic investigations on binary and ternary liquid mixtures and compared the experimental results with the theoretical relations of Nomoto 11 , Van Dael and Vangeel 12 , impedance dependence 13 , Rao's specific velocity 14 and Junjie's 15 equations and the results are explained in terms of molecular interactions. An attempt has been made to compare the merits of relations for the ternary liquid mixtures investigated at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Studies of Ultrasonic Velocity in Ternary Liquid Mixtures of Methyl Benzoate, Cyclohexane and Alcohols at Different Temperatures

Muthukrishnan¹,

Kesavasamy²,

Rathinasamy³

et al. 2014

Asian J. Chem.

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Ultrasonic velocities of ternary liquid mixtures of methyl benzoate and cyclohexane with 1-propanol, 1-butanol, 1-pentanol and 1hexanol are measured using ultrasonic interferometer at 303, 308 and 313 K over the entire range of composition. Theoretical values of ultrasonic velocity have been evaluated at the three temperatures using Nomoto's relation, ideal mixture relation, impedance relation, Junjie's method, Rao's specific velocity relation and free length theory. Theoretical values are compared with the experimental values and Uexp 2 /Uimx 2 is evaluated for non-ideality in the mixtures. A good agreement has been found between experimental and theoretical values of ultrasonic velocity. The relative applicability of these theories to the present systems has been checked and discussed. The results are explained in terms of molecular interactions occurring in these ternary liquid mixtures.

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“…There are also industrial applications of this kind of flow in crystal growth [3] and in fusion reactor as heat exchanger [4]. There has been extensive theoretical and numerical studies of thermal convection in fluids in presence of external magnetic field [1,[5][6][7][8][9][10][11]. These studies reveal the stabilizing effect of the magnetic field on convective flow.…”

Section: Introductionmentioning

confidence: 99%

Role of uniform horizontal magnetic field on convective flow

Pal,

Kumar

2013

Preprint

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The effect of uniform magnetic field applied along a fixed horizontal direction in Rayleigh-Bénard convection in low-Prandtl-number fluids has been studied using a low dimensional model. The model shows the onset of convection (primary instability) in the form of two dimensional stationary rolls in the absence of magnetic field, when the Rayleigh number R is raised above a critical value Rc. The flow becomes three dimensional at slightly higher values of Rayleigh number via wavy instability. These wavy rolls become chaotic for slightly higher values of R in low-Prandtl-number (Pr) fluids. A uniform magnetic field along horizontal plane strongly affects all kinds of convective flows observed at higher values of R in its absence. As the magnetic field is raised above certain value, it orients the convective rolls in its own direction. Although the horizontal magnetic field does not change the threshold for the primary instability, it affects the threshold for secondary (wavy) instability. It inhibits the onset of wavy instability. The critical Rayleigh number Ro(Q, Pr) at the onset of wavy instability, which depends on Chandrasekhar's number Q and Pr, increases monotonically with Q for a fixed value of Pr. The dimensionless number Ro(Q, Pr)/(RcQPr) scales with Q as Q −1 . A stronger magnetic field suppresses chaos and makes the flow two dimensional with roll pattern aligned along its direction.

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Electron ionization cross sections for neutral fullerene C70

Cited by 5 publications

References 11 publications

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Evaluation of Electron-Impact Ionization Cross Sections for Molecules

Experimental and Theoretical Studies of Ultrasonic Velocity in Ternary Liquid Mixtures of Methyl Benzoate, Cyclohexane and Alcohols at Different Temperatures

Role of uniform horizontal magnetic field on convective flow

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