Browsing Department of Physics by Title

Now showing items 1-20 of 212

    • AC Conductivity and Dielectric Relaxation in Ba(Sm1/2Nb1/2)O-3 Ceramic 

      Kumar, Pritam; Singh, Bhrigunandan Prasad; Sinha, Tripurari Prasad; Singh, N. K. (Elsevier Science, 2011-01-15)
      The complex perovskite oxide a barium samarium niobate (BSN) synthesized by solid-state reaction technique has single phase with cubic structure. The scanning electron micrograph of the sample shows the average grain size ...

    • AC conductivity and dielectric relaxation in CaMg1 / 3 Nb2 / 3 O3 

      Dutta, Alo; Bharti, Chandrahas; Sinha, Tripurari Prasad (PERGAMON-ELSEVIER SCIENCE LTD, 2008-05-06)
      The complex perovskite oxide calcium magnesium niobate, CaMg1/3Nb2/3O3 (CMN) is synthesized by a solid-state reaction technique. Dielectric spectroscopy is applied to investigate the electrical properties of CMN in a ...

    • Ac conductivity of conducting polymer prepared with the use of water soluble support polymer 

      Himanshu, A. K.; Ray, D.K.; Sinha, Tripurari Prasad (IACS, 2005-09)
      The intrinsically conducting polymer, polyaniline (PANI) is synthesized by chemical oxidative polymerization process with the help of water soluble support polymer poly-vinyl alcohol (PVA). The field dependence of the ...

    • An active device for volumetric measurement of drop nucleation in a superheated emulsion detector 

      Mondal, P. K.; Chatterjee, Barun Kumar (IOP PUBLISHING LTD, 2008-10-01)
      An active volumetric device for active detection and measurement of drop nucleation of superheated emulsions is described. The drop nucleation is detected by an optical arrangement using a pair of a laser and a light-dependent ...

    • Aerosol Chemistry Over a High Altitude Station at Northeastern Himalayas, India 

      Chatterjee, Abhijit; Adak, Anandamay; Singh, Ajay K.; Srivastava, Manoj K.; Ghosh, Sanjay Kumar; Tiwari, Suresh; Devara, Panuganti C. S.; Raha, Sibaji (PLoS One, 2010-06-16)
      Background: There is an urgent need for an improved understanding of the sources, distributions and properties of atmospheric aerosol in order to control the atmospheric pollution over northeastern Himalayas where rising ...

    • Analyzing powers and spin correlation coefficients for p+d elastic scattering at 135 and 200 MeV 

      Przewoski, B. V.; Meyer, H. O.; Balewski, J. T.; Daehnick, W. W.; Doskow, J.; Haeberli, W.; Ibald, R.; Lorentz, B.; Pollock, R. E.; Pancella, P. V.; Rathmann, F.; Rinckel, T.; Saha, Swapan K.; Schwartz, B.; Thörngren-Engblom, P.; Wellinghausen, A.; Whitaker, T. J.; Wise, T. (AMERICAN PHYSICAL SOC, 2006-12-01)
      The proton and deuteron analyzing powers and ten of the possible 12 spin correlation coefficients have been measured for p+d elastic scattering at proton bombarding energies of 135 and 200 MeV. The results are compared ...

    • ASCENT OF SAP 

      Chatterjee, Barun Kumar (Indian Science News Association, 2008-11-01)
      The enigmatic rise of water (sap) through the xylem of various plants has been a topic of active research and controversy for several decades. Various models like the vital theory models (viz. the pulsatile pumping model ...

    • Aspects of nonideal Stern-Gerlach experiment and testable ramifications 

      Home, Dipankar; Pan, A. K.; Ali, Md. M.; Majumdar, A. S. (IOP PUBLISHING LTD, 2007-11-16)
      We critically examine the quantum-mechanical modelling of a measurement process using the Stern-Gerlach (SG) setup in the most general context, probing in particular for nonideal situations, the subtleties involved in the ...

    • Asymmetry and the shift of the Compton profile 

      Chatterjee, Barun Kumar; Roy, S. C.; Suric, T.; LaJohn, L. A.; Pratt, R. H. (ELSEVIER SCIENCE BV, 2007-09-21)
      We show that the conventionally defined asymmetry of the Compton profile (CP) is, to a large extent, simply a shift of CP. Compton scattering is widely used in studying the electron momentum distribution (EMD) of complex ...

    • Barium Titanate Ground- and Excited-State Properties from First-Principles Calculations 

      Sanna, S.; Thierfelder, C.; Wippermann, S.; Sinha, Tripurari Prasad; Schmidt, Wolf Gero (American Physical Society, 2011-02-23)
      We present a comprehensive theoretical investigation of paraelectric (cubic) and ferroelectric (tetragonal) BaTiO3. The atomic and electronic structure, piezoelectric tensor, Debye temperature, zone center phonon frequencies, ...

    • Bistability: a universal theme 

      Bose, Indrani (Indian Society of Cell Biology, 2007-01-01)
      T he concept of bistability is well-established in the study of dynamical systems [1]. The key feature of a dynamical system is that the state of the system changes as a function of time. The living cell offers several ...

    • Bose Institute : A Historical Perspective,1917-47 

      Siddiqi, Maqsood; Raha, Sibaji (Pearson Longman, 2011)

    • Bose Institute: A Historical Perspective, 1917-47 

      Raha, Sibaji; Siddiqi, Maqsood, Auth (Pearson Longman, 2010)

    • Calibration of a Solid State Nuclear Track Detector (SSNTD) with High Detection Threshold to Search for Rare Events in Cosmic Rays 

      Dey, S.; Gupta, Dhruba; Maulik, A.; Raha, Sibaji; Saha, Swapan K.; Syam, Debapriyo; Pakarinen, J.; Voulot, D.; Wenander, F. (Elsevier, 2011-06)
      We have investigated a commercially available polymer for its suitability as a solid state nuclear track detector (SSNTD). We identified that polymer to be polyethylene terephthalate (PET) and found that it has a higher ...

    • Characteristics of acoustic emissions during nucleation of superheated droplets 

      Mondal, P.K.; Chatterjee, Barun Kumar (ELSEVIER SCIENCE BV, 2011-01-17)
      Superheated droplet nucleation and subsequent bubble oscillation produces an acoustic pressure pulse that contains valuable information about the nucleation process. Spectral analysis of the pressure pulse indicates ...

    • Characterization and Calibration of a SSNTD for Heavy-ion Detection and Strangelet Search in Cosmic Rays 

      Bhowmik, D.; Dey, S.; Maulik, A.; Raha, Sibaji; Saha, S.; Saha, Swapan K.; Syam, Debapriyo (Elsevier, 2011-01-15)
      A commercially available grade of polymer was investigated for its suitability as a solid state nuclear track detector (SSNTD) to look for rare events in cosmic rays at very high mountain altitudes. It was identified to ...

    • Characterization of a polymer as a heavy ion detector 

      Basu, B.; Fischer, B.; Mazumdar, A.; Raha, Sibaji; Saha, S.; Saha, Swapan K.; Syam, D. (TATA INST FUNDAMENTAL RESEARCH, 2005)
      A particular brand of polymer, commonly used as overhead projector transparencies, has been used as a solid state nuclear track detector with Z/beta > 35. From the infra-red transmission spectrum by FTIR Spectrophotometer, ...

    • Characterization of some commercial polymers for the detection of massive cosmic ray particles 

      Basu, Basudhara; Mazumdar, A.; Raha, Sibaji; Saha, S.; Saha, Swapan K.; Syam, D. (INDIAN ASSOC CULTIVATION SCIENCE, 2005-03-01)
      A particular brand (CENTURY de'Smat, India) of overhead projector (OHP) film has been exposed to α-particle and fission fragments from 252Cf natural source in order to investigate its detection efficiency and charge ...

    • Charge response of polyethylene terephthalate polymers (PET) to light and heavy nuclei 

      Basu, B.; Dey, S.; Fischer, B.; Maulik, A.; Mazumdar, A.; Raha, Sibaji; Saha, S.; Saha, S.K.; Syam, Debapriyo (PERGAMON-ELSEVIER SCIENCE LTD, 2008-08-01)
      A particular brand of common polymer film has been found to have a high detection threshold value of Z / β, when used as a solid state nuclear track detector to detect energetic ion beams. From the infra-red absorption ...

    • Colour entangled orphan quarks and dark energy from cosmic QCD phase transition 

      Banerjee, S.; Bhattacharyya, A .; Ghosh, Sanjay Kumar; Raha, Sibaji; Sinha, B.; Takasugi, E.; Toki, H. (ELSEVIER SCIENCE BV, 2006-08-07)
      No abstract available