Browsing by Author "Prerna Garg"

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Exploring the influence of entrance channel on neutron multiplicity for 212Rn∗
(Akademiai Kiado ZRt., 2024) Punit Dubey; Prem Singh; Prerna Garg; Ajay Kumar
The effect of the entrance channel and neutron shell closure (N = 126) on the pre-scission neutron emission of 212Rn is investigated using available experimental data from EXFOR and theoretical calculations. It is found that the entrance channel plays a vital role in nuclear dissipation. Further, shell closure effects on neutron emission are also investigated as a function of excitation energy and its dependence on the entrance channel. Our study on the effects of entrance channel mass asymmetry (α) shows that the pre-scission neutron multiplicity (νpre) changes when the projectile and target combine to form the same compound nucleus (CN), which is shell closed. In addition, we have observed variations in the νpre when calculating the N/Z ratio near the shell closure which has not been observed. © Akadémiai Kiadó, Budapest, Hungary 2024.
Synthesis, physical, optical and structural properties of SrTiO3 borosilicate glasses with addition of CrO3
(Springer, 2023) Abhishek Madheshiya; Anod Kumar Singh; Shweta; Rajat Kumar Mishra; Krishna Kishor Dey; Manasi Ghosh; Kamal K Srivastava; Prerna Garg; Chandkiram Gautam
Herein, we reported physical, optical and NMR characteristics of SrTiO3-based borosilicate glasses-doped chromium trioxide, CrO3 (1–7 mol%). Five glass samples (GS) were fabricated from the glassy system 60[Sr·TiO3]–40[2SiO2·B2O3] via a rapid melt-quench technique. X-ray diffraction analysis revealed the unstructured behaviour of the glasses. Numerous physical parameters were calculated and explained in detail. Urbach energy (EU) and skin depth (δ) were studied to approve the disordered structure of glasses. Recorded infrared spectra of glasses were utilized to clarify the stretching mode of vibrations between the atoms, which correlated with their structural features and compositional variations. The energy bandgap (Eg) was estimated by employing a Davis and Mott relationship that comprises an absorption coefficient, α, as well as photon energy, hυ. Further, nuclear magnetic resonance (solid-state) spectra of the glasses were recorded and their analysis showed that the silicate and borate networks became highly polymerized with decreasing concentration of SrTiO3. © 2023, Indian Academy of Sciences.