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9,510 results on '"Kumar, Raj"'

105. Reply to the 'Comment on `Effect of density and nucleon-nucleon potential on the fusion cross section within the relativistic mean field formalism''

Author

Bhuyan, M., Kumar, Raj, Rana, Shilpa, Jain, D., Patra, S. K., and Carlson, B. V.

Subjects
Nuclear Theory
Abstract

In reply to the Comment made by M. V. Chushnyakova et al. on our paper [Phys. Rev. C 101, 044603 (2020)], we argue that the calculations, results and conclusions of our paper remain valid. We have shown here the calculations for one reaction using the deformed densities and the R3Y nucleon-nucleon potential obtained within the relativistic mean-field (RMF) formalism. Suitable clarications and justifications are given to address all the points raised in the Comment.

Published
2023

132. Targeting Galectin 3 illuminates its contributions to the pathology of uterine serous carcinoma

Author

Matoba, Yusuke, Zarrella, Dominique T., Pooladanda, Venkatesh, Azimi Mohammadabadi, Maryam, Kim, Eugene, Kumar, Shaan, Xu, Mengyao, Qin, Xingping, Ray, Lauren J, Devins, Kyle M., Kumar, Raj, Kononenko, Artem, Eisenhauer, Eric, Veillard, Irva E., Yamagami, Wataru, Hill, Sarah J., Sarosiek, Kristopher A., Yeku, Oladapo O., Spriggs, David R., and Rueda, Bo R.

Published
2024
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140. Cluster decay dynamics of Actinides yielding non-Pb-daughter

Author

Majekodunmi, Joshua T., Bhuyan, M., and Kumar, Raj

Subjects
Nuclear Theory
Abstract

The cluster dynamics of radioactive nuclei decaying to neighbouring daughter nuclei of the double magic $^{132}$Sn and $^{208}$Pb is investigated using the relativistic mean-field (RMF) approach with NL3$^*$ parameter set within the preformed cluster-decay model (PCM). The novel feature of the present study is the application of the newly derived preformation formula, laying the groundwork for accessing the break-up of the Q-value: preformation energy, cluster emission energy and the recoil energy of the daughters formed. The energy associated with cluster preformation is theoretically quantified for the first time. This treatment underscores the shell effect, pairing correlation as well as the blocking of particular orbitals by unpaired nucleons. To ascertain the applicability of the new formula, the PCM based calculations are carried out with nuclear potential obtained using the phenomenological M3Y and microscopic RMF-based R3Y nucleon-nucleon (NN) potentials along with corresponding densities. We found a marginal variation that can be attributed to the difference in their barrier properties, however, the predictions for the case of both M3Y and R3Y potentials are found to agree well with the experimental half-lives. Although none of the considered reaction systems yields a double magic daughter nucleus, we found that the kinematics of their cluster emissions is governed by their proximity to the shell closure. The deduced systematic of the recoil energy in cluster decays can provide valuable insight for the synthesis of elements in superheavy mass region in the future., Comment: 10 pages, 5 figures, Journal

Published
2023

146. Skyrmion-mediated nonvolatile ternary memory

Author

Md Mahadi Rajib, Namita Bindal, Ravish Kumar Raj, Brajesh Kumar Kaushik, and Jayasimha Atulasimha

Subjects
Medicine, Science
Abstract

Abstract Multistate memory systems have the ability to store and process more data in the same physical space as binary memory systems, making them a potential alternative to existing binary memory systems. In the past, it has been demonstrated that voltage-controlled magnetic anisotropy (VCMA) based writing is highly energy-efficient compared to other writing methods used in non-volatile nano-magnetic binary memory systems. In this study, we introduce a new, VCMA-based and skyrmion-mediated non-volatile ternary memory system using a perpendicular magnetic tunnel junction (p-MTJ) in the presence of room temperature thermal perturbation. We have also shown that ternary states {− 1, 0, + 1} can be implemented with three magnetoresistance values obtained from a p-MTJ corresponding to ferromagnetic up, down, and skyrmion state, with 99% switching probability in the presence of room temperature thermal noise in an energy-efficient way, requiring ~ 2 fJ energy on an average for each switching operation. Additionally, we show that our proposed ternary memory demonstrates an improvement in area and energy by at least 2X and ~ 104X respectively, compared to state-of-the-art spin-transfer torque (STT)-based non-volatile magnetic multistate memories. Furthermore, these three states can be potentially utilized for energy-efficient, high-density in-memory quantized deep neural network implementation.

Published
2024
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