Browsing by Author "Amit"

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Fission dynamics and entrance-channel study in the Po 210 compound nucleus via light-particle multiplicities
(American Physical Society, 2023) Chetan Sharma; B.R. Behera; Shruti; Amit; Bharti Rohila; Amninderjeet Kaur; Subodh; Neha Dhanda; Ashok Kumar; P. Sugathan; A. Jhingan; K.S. Golda; N. Saneesh; Mohit Kumar; H. Arora; Divya Arora; H.P. Sharma
Neutron multiplicities, folding angle distribution, mass distribution, and mass-energy distribution are measured for the compound nucleus Po210 populated through the C12+Pt198 reaction at an excitation energy of 61.6 MeV. The measured neutron multiplicities are compared with the statistical model code joanne2 to extract total fission time for the Po210 compound nucleus. The total fission time (τtot) obtained for this system is (10±5)×10-21 s at 49 MeV and increases to (23±5)×10-21 at 61.8 MeV excitation energy indicating that dissipation increases with excitation energy. A comparison with τtot of the O18+Os192 reaction populating the same compound nucleus indicates the influence of entrance channel mass asymmetry on the fission time. Dynamical model calculations have been performed to understand the fusion dynamics for these reactions and it is observed that the formation time of the compound nucleus increases as we go from the asymmetric to the symmetric entrance channels. Also, these calculations predict that 93% of the total angular momentum lead to the formation of a fully equilibrated compound nucleus for the C12+Pt198 reaction whereas this percentage decreases to 84%, for the O18+Os192 reaction indicating a higher percentage of noncompound nuclear processes in the latter case. © 2023 American Physical Society.
Non-stationary ϕ -contractions and associated fractals
(Springer Science and Business Media B.V., 2022) Amit; Vineeta Basotia; Ajay Prajapati
In this study we provide several significant generalisations of Banach contraction principle where the Lipschitz constant is substituted by real-valued control function that is a comparison function. We study non-stationary variants of fixed-point. In particular, this article looks into “trajectories of maps defined by function systems” which are regarded as generalizations of traditional iterated function system (IFS). The importance of forward and backward trajectories of general sequences of mappings is analyzed. The convergence characteristics of these trajectories determined a non-stationary variant of the traditional fixed-point theory. Unlike the normal fractals which have self-similarity at various scales, the attractors of these trajectories of maps which defined by function systems that may have various structures at various scales. In this literature we also study the sequence of countable IFS having some generalized contractions on a complete metric space. © 2022, The Author(s), under exclusive licence to The Forum D’Analystes.
Study of nuclear structure in 122Ba from DCO Ratio and Polarization measurements
(Springer, 2025) Bharti Rohila; Ashok S.k. Kumar; Diwanshu; Chetan Kumar Sharma; Amit; Subodh; Honey Arora; Mehak Narula; Nabeel Salim; Paramasivan Arumugam; Md Anser; Hariprakash P. Sharma; Anand Pandey; S. K. Chamoli; Kaushik T. Katre; Yashraj; R. P. Singh; Sivaramakrishnan Muralithar
High-spin states in 122Ba have been investigated in the 93Nb(32S, p2n) reaction by in-beam γ-ray spectroscopy. Spin and parity have been determined for few bands using the DCO ratio and polarization measurements. The cranked shell model calculations have been performed to reproduce the band crossing frequencies and alignment gain in order to assign the configuration. © The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025.