Department of Physics

Permanent URI for this communityhttps://ir.nbu.ac.in/handle/123456789/4173

Physics is one of those departments with which North Bengal University started its journey in the year 1962. At present there are nine faculty members and ten non-teaching employees in the department. The department has active research groups in the field of (a) Liquid Crystal, (b) Relativity, Cosmology, and Astrophysics, (c) High-energy Heavy-ion Interaction and Cosmic-ray Physics, and (d) Solid-state devices. Several research projects sponsored by the DST, DAE, UGC, and Tea Research Board are running in the department. In the year 2003 the department received a financial support under the FIST programme from the DST, Govt. of India. The department offers both M.Sc. and Ph.D. courses. A semester system is followed in the M.Sc. level, with three different areas of specialization namely, Condensed Matter Physics, Electronics and Nuclear and Particle Physics, out of which a student can choose one. The annual intake capacity in M.Sc. is 40 students. In the Ph.D. programme of the department right now 25 research students are enrolled under the supervision of different faculty members. Almost all faculty members are involved in intra and inter-university national and international collaborations of scientific research. The department houses one IUCAA Resource Centre, a Data Centre for Observational Astronomy, six teaching laboratories, several research laboratories and one departmental library. From time to time the department organizes Seminars, Symposia, Conferences, Schools, Refresher Courses, and Outreach Programs.

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    TeV-PeV energy neutrinos and gamma rays from extragalactic milli-second pulsars
    (University of North Bengal, 2021-03) Dey, Rajat; Sarkar, Tamai
    The origin of the detected diffuse flux of extragalactic Pe V neutrinos during 2010 - 2017 by the Ice Cube Experiment is not clear and various models with sources were proposed for it. In the present work, we try to find theoretically whether pulsars could be one possible source. With our study, we found that the extragalactic millisecond pulsars which are newly born may be one possible source of Pe V neutrinos and gamma rays. For the purpose, we took two-step particle acceleration scheme for transferring the rotational energy to the electrons which are accelerated to high energy or boosted up to ~ 0.01 EeV energies or above. The high energy boosted electrons interacted with cold positrons and soft radiation in the acceleration zone might produce Ultra High Energy (UHE) neutrinos and gamma rays. The theoretically derived extragalactic muon neutrino energies are found consistent with the Ice Cube detection.