https://ir.vidyasagar.ac.in/jspui/handle/123456789/257 2026-04-28T04:50:23Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/1377 Title: Characteristics of Subnormal Glow Discharge in Longitudinal Magnetic Field in Air Authors: Pradhan, S. S. Abstract: The current-voltage characteristic of subnormal glow discharge has a negative slope [1]. The voltage decreases exponentially with the discharge current. This property has been studied and an analytical expression has been introduced to represent the subnormal glow region [2]. This expression contains a dimensional constant mp. In transverse magnetic field the same work has been studied and the subnormal glow discharge has been explained satisfactorily using the same analytical expression [3]. The aim of the present work is to study the current-voltage characteristic in longitudinal magnetic field and to explain the subnormal glow discharge with the introduced dimensional constant mp. It is observed that the subnormal glow discharge is explained satisfactorily in longitudinal magnetic field as well using the analytical expression containing dimensional constant mp. 2016-12-24T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/1376 Title: Content of Volume 21 of Journal of Physical Sciences Authors: Pal, Madhumangal 2016-12-24T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/1375 Title: Editorial Board Authors: Board of Editors 2016-12-24T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/1374 Title: Structural, Optical and Optoelectrical Study of ZnS Nanoparticles by Varying Reducing Agent in Chemical Reduction Route Authors: Bera, K.; Saha, S.; Jana, P. C. Abstract: In this work we report on the growth of ZnS semiconductor nanocrystals with different ratio of reducing agent using chemical reduction route in THF medium. Reducing agent takes an important role in the growth of nanoparticles as it determines the reaction rate in the formation of ZnS nanoparticle. With increased amounts of sodium borohydride as a reducing agent, the sizes of the nanoparticles are decreased. The samples are characterized using XRD, electron diffraction, electron micrograph, EDAX, optical absorption, photoluminescence techniques. XRD and TEM shows that particle size is reduced with increase of reducing agent ratio. Optical absorption study shows that band gap increases with decrease of particle size. Photoluminescence study shows that there is band edge luminescence as well as luminescence from surface states. Photoconductivity and conductivity of the films composed of ZnS nanoparticles are studied. Relaxation time is measured and is found to be dependent on the size of the nanoparticle. 2016-12-24T00:00:00Z