R PRASAD
Articles written in Pramana – Journal of Physics
Volume 24 Issue 4 April 1985 pp 637-642 Nuclear Physics
Pre-equilibrium emission effect in (
J P Gupta H D Bhardwaj R Prasad
The influence of pre-equilibrium emission on (
Volume 31 Issue 2 August 1988 pp 109-123 Nuclear Physics
Measurement and analysis of excitation functions for alpha-induced reactions in copper
H D Bhardwaj A K Gautam R Prasad
Excitation functions for the production of^{68}Ga,^{67}Ga,^{66}Ga,^{65}Ga +^{65}Zn and^{61}Cu from
Volume 47 Issue 5 November 1996 pp 401-410
Measurement and analysis of excitation functions for alpha induced reactions on iodine and cesium
N P M Sathik M Afzal Ansari B P Singh R Prasad
The excitation functions for the reactions^{127}I(
Volume 94 All articles Published: 4 September 2020 Article ID 0135 Research Article
Bulk viscous accelerating Universe in $f (R, T)$ theory of gravity
R PRASAD LALIT KUMAR GUPTA G K GOSWAMI ANIL KUMAR YADAV
In this paper, we propose that the late-time acceleration of the Universe is due to bulk viscous fluid and trace of energy–momentum tensor $T$ in $f (R, T )$ theory of gravity. We assume that $f (R, T ) = f (R)+2 f (T )$ with $f (R) = R$ and $f (T ) = \lambda T$ where $\lambda$ is a constant, $R$ and $T$ are the Ricci scalar and trace of energy–momentum tensor. First, we obtain an exact solution of the bulk viscous Universe in $f (R, T )$ gravity, then we use observational Hubble data (OHD), the baryon acoustic oscillation (BAO) distance ratio data as well as SN Ia data to constrain the parameters of the derived bulk viscous Universe. Our estimations show that in the model under consideration $H_{0} = 69.089$ km/Mpc/s which is in good agreement with recent astrophysical observations. We ascertain the present age of the derived Universe as well as the signature flipping behaviour of deceleration parameter. Some physical properties of the derived model are also discussed.
Volume 97, 2023
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