Publisher: Indian Academy of Sciences; Indian National Science Academy; Indian Physics Association, Springer Verlag


Pramana - Journal of Physics is a monthly research journal in English published by the Indian Academy of Sciences in collaboration with Indian National Science Academy and Indian Physics Association. The journal publishes refereed papers covering current research in Physics, both original contributions - research papers, brief reports or rapid communications - and invited reviews. Pramana also publishes special issues devoted to advances in specific areas of Physics and proceedings of select high quality conferences.

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    Pramana - Journal of Physics website
  • Other titles
    Pramāṇa (Online), Epramana, Pramāṇa, journal of physics
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    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

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Springer Verlag

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    • Articles in some journals can be made Open Access on payment of additional charge
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Publications in this journal

  • P. Sugathan, A. Jhingan, K. S. Golda, T. Varughese, Sankararaja Venkataramanan, N. Saneesh, V. V. Satyanarayana, S. K. Suman, J. Antony, Ruby Shanti, [......], A. Gupta, A. Kothari, P. Barua, Rajesh Kumar, J. Zacharias, R. P. Singh, B. R. Behera, S. K. Mandal, I. M. Govil, R. K. Bhowmik
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    ABSTRACT: Abstract. The characteristics and performance of the newly commissioned neutron detector array at IUAC are described. The array consists of 100 BC501 liquid scintillators mounted in a semi- spherial geometry and are kept at a distance of 175 cm from the reaction point. Each detector is a 5"x5"cylindrical cell coupled to 5"diameter photomultiplier tube (PMT). Signal process- ing is realized using custom-designed home-made integrated electronic modules which perform neutron–gamma discrimination using zero cross timing and time-of-flight (TOF) technique. Com- pact custom-built high voltage power supply developed using DC–DC converters are used to bias the detector. The neutrons are recorded in coincidence with fission fragments which are detected using multi-wire proportional count ers mounted inside a 1 m diameter SS target chamber. The detectors and electronics have been tested off-line using radioactive sources and the results are presented.
    Pramana 11/2014; 83(5):807-815.
  • Pramana 08/2014; 83(2):241-253.
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    ABSTRACT: We study static spherically symmetric space-time to describe relativistic compact objects with anisotropic matter distribution and derive two classes of exact models to the Einstein–Maxwell system with a modified Van derWaals equation of state. We motivate a Van derWaals-type equation of state to physically signify a high-density domain of quark matter, and the generated exact solutions are shown to contain several classes of exact models reported previously that correspond to various physical scenarios. Geometrical analysis shows that the physical quantities are well behaved so that these models may be used to describe anisotropic charged compact spheres.
    Pramana 07/2014; 83(1):83-93.
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    ABSTRACT: The continuous-wave output of a single-mode erbium-doped fibre ring laser when subjected to cavity-loss modulation is found to exhibit linear as well as nonlinear resonances. At sufficiently low driving amplitude, the system resembles a linear damped oscillator. At higher amplitudes, the dynamical study of these resonances shows that the behaviour of the system exhibits features of a nonlinear damped oscillator under harmonic modulation. These nonlinear dynamical features, including harmonic and subharmonic resonances, have been studied experimentally and analysed with the help of a simple time-domain and frequency-domain information obtained from the output of the laser. All the studies are restricted to the modulation frequency lying in a regime near the relaxation oscillation frequency.
    Pramana 07/2014; 83(1):147-159.
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    ABSTRACT: We present first-principle calculations of 2D nanostructures of graphene functionalized with hydrogen and fluorine, respectively, in chair conformation. The partial density of states, band structure, binding energy and transverse displacement of C atoms due to functionalization (buckling) have been calculated within the framework of density functional theory as implemented in the SIESTA code. The variation in band gap and binding energy per add atom have been plotted against the number of add atoms, as the number of add atoms are incremented one by one. In all, 37 nanostructures with 18C atoms, 3 × 3 × 1 (i.e., the unit cell is repeated three times along x-axis and three times along y-axis) supercell, have been studied. The variation in C–C, C–H and C–F bond lengths and transverse displacement of C atoms (due to increase in add atoms) have been tabulated. A large amount of buckling is observed in the carbon lattice, 0.0053–0.7487 Å, due to hydrogenation and 0.0002–0.5379 Å, due to fluorination. As the number of add atoms (hydrogen or fluorine) is increased, a variation in the band gap is observed around the Fermi energy, resulting in change in behaviour of nanostructure from conductor to semiconductor/insulator. The binding energy per add atom increases with the increase in the number of add atoms. The nanostructures with 18C+18H and 18C+18F have maximum band gap of 4.98 eV and 3.64 eV, respectively, and binding energy per add atom –3.7562 eV and –3.3507 eV, respectively. Thus, these nanostructures are stable and are wide band-gap semiconductors, whereas the nanostructures with 18C+2H, 18C+4H, 18C+4F, 18C+8F, 18C+10F and 18C+10H atoms are small band-gap semiconductors with the band gap lying between 0.14 eV and 1.72 eV. Fluorine being more electronegative than hydrogen, the impact of electronegativity on band gap, binding energy and bond length is visible. It is also clear that it is possible to tune the electronic properties of functionalized graphene, which makes it a suitable material in microelectronics.
    Pramana 06/2014;
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    ABSTRACT: By exploiting supersymmetry-inspired factorization method together with a judiciously chosen deuteron ground-state wave function, approximate higher partial wave nucleon–nucleon potentials are generated. In this context, a minor modification is also introduced to the generated potentials. The n–p scattering phase shifts are computed and analysed via the phase function method.
    Pramana 05/2014; 82(05):859-865.
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    ABSTRACT: The direct part of real α−α interaction potential is calculated in the simple folding model using density-dependent Brink–Boeker effective interaction. The simple folding potentials calculated from the short- and finite-range components of this effective interaction are compared with their corresponding double folding results obtained from the oscillator model wave function to establish the relative accuracy of the model. It is found that the direct part of real α–α interaction potential calculated in the simple folding model is reliable.
    Pramana 04/2014; 82(05):841-849.
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    ABSTRACT: This chapter presents the application of laser induced breakdown spectroscopy (LIBS) to different sensing scenarios that highlight the applicability and need for such a diverse and multi-modal sensing technique for carbon capture and sequestration applications. The use of LIBS to sense, qualify, and quantify atomic concentrations in solids, liquids, and gases at the parts per million (ppm) level without any significant difference in the experimental setup is a testament to the versatility and robustness of this technique when applied to such a complex range of measurement environments. The LIBS technique was calibrated and applied to the measurement of CO2 concentrations in ambient air as well as over a wide range of concentrations. The relative standard deviation (RSD) of the measurements was found to range from 1-10% and significantly depended on the number of data points collected. The sampling time ranged from 8 seconds (single measurement) with a RSD of analysis approximately 10% to a sampling time of 6 minutes (40 measurements) with a RSD of approximately 1.24%. The LIBS technique was also calibrated and applied to the measurement of total carbon in soil samples. This technique required minimal sample preparation and provided measurements which had a relative accuracy that was comparable to a commercial carbon analyzer and shown to be 5.44% or less. This technique also explored multiple linear regression models to improve the detection capabilities of the system. The LIBS technique was lastly applied to measure the concentration of calcium in various saline solutions to determine the effect, if any, that the amount of sodium in solution has on the measurement of the calcium concentration. The limit of detection for the calcium concentration was measured to be 17 +/- 0.6 mg/L (ppm). It should also be noted that the measurement of the calcium at low concentration became possible as the increased concentration of sodium in the solution induced a significant increase in the intensity of calcium emission line. The liquid measurement technique was designed to produce a LIBS spark within the bulk liquid and not at the liquid air interface.
    Spectroscopic Techniques for Security, Forensic and Environmental Applications, Edited by Y. Dwivedi, S. B. Rai, J. P. Singh, 04/2014: chapter Application of Laser Induced Breakdown Spectroscopy (LIBS) to Carbon Sequestration Research and Development: pages 25-52; Nova Science., ISBN: 978-1-63117-404-9
  • Pramana 03/2014; Vol. 82, No. 3, March 2014,:563-569.
  • Pramana 03/2014; 82(3):499-514.
  • Pramana 02/2014; 82(3).
  • Pramana 02/2014; 82(3).