Selected topics manifesting QCD/gravity relations are briefly discussed
Ferrofluids are currently widely investigated for technical and biomedical applications including water treatment, energy harvesting and transfer, vibration control, magnetic electromagnetic wave absorption, energy storage applications, hyperthermia, magnetic drug delivery, biocatalysis, enzyme immobilization, DNA separation and purification, and magnetic resonance imaging, etc. Many of the...
Unlike other reaction mechanisms, fission process produces huge number of fragment nuclei; all being produced at the same instant of time. Thus γ-spectra following a typical fission reaction are found to be extremely complicated, and often become very challenging to carry out the unambiguous analysis. Although it is very challenging to make an unambiguous analysis of the complicated γ spectra...
The topological superconductivity with Majorona zero modes (MZM) is of
fundamental scientific importance, due to their proposed application in the
braiding-based quantum computing [1]. The first theoretical proposal for
the realization of the MZM was involved placing an one dimensional (1D)
quantum wire with spinless electrons on a p-wave superconductors [2].
However, from the material...
The quark-gluon plasma (QGP), a new state of nuclear matter at extremely high temperature and pressure where quarks and gluons are deconfined can be produced in relativistic heavy-ion collisions. Experimentally QGP is regularly produced in the laboratory by colliding ions in relativistic energy to create such an extreme temperature and pressure. An extensive study of the formation of the QGP...
The study employs second-order viscous hydrodynamics with an equation of state featuring an embedded critical point to study the propagation of linear and nonlinear perturbations in the quark-gluon plasma (QGP). Notably, perturbations dissipate significantly when the QGP approaches the critical point. Consequently, the mach cone effects on away side jet particle correlations vanish. The...
The Multi-Purpose Detector (MPD) experiment is a flagship heavy-ion experiment at the NICA facility under construction at JINR, in Dubna, Russia expected to start operation in 2025. The experiment will operate in the energy range √sNN = 4-11 GeV which covers the high net-baryon density region of the QCD phase diagram. Among the various physics topics covered by the MPD physical program,...
Relativistic dissipative hydrodynamics has been applied quite successfully to understand the space-time evolution of strongly interacting hot and dense matter formed in high energy heavy-ion collisions. Recent relativistic heavy-ion collision experiments have also found evidence for the generation of strong magnetic field and global angular momentum. The presence of these effects requires us...
Decades of effort in developing accelerator facilities, detector developments, and electronics have helped us better understand the heavy-ion reaction dynamics, particularly in the low-energy region. Various aspects of elastic and inelastic scattering, fusion, transfer, and influence of inelastic couplings in the scattering and fusion have been investigated in nucleus-nucleus interactions....
The application of mosses as biomonitors of trace elements and radionuclides in selected rural and urban areas affected by intense anthropogenic activity is reviewed. This technique is widely used in many countries in Europe (https://icpvegetation.ceh.ac.uk/), whereas it is scarcely used in Asia. The aim of the UNECE International Cooperative Program (ICP) Vegetation in the framework of the...
R. Sariyala,b, I. Mazumdarb , D. Mehtaa , N. Madhavanc , S. Nathc , J. Gehlotc , Gonikac , S. M. Patelb , P. B. Chavanb , S. Panward,b, V. Rangad,b, A. Pariharie , A. K. Nasirovf,g, B. M. Kayumovg,h
aDepartment of Physics Panjab University Chandigarh-160014 India,
bDepartment of Nuclear and Atomic Physics Tata Institute of Fundamental Research Colaba-400005 Mumbai India.
cInter-University...
Even when cultivated in uncontaminated soils, tobacco plant has higher propensity to extract and accumulate trace elements. The concentrations of essential elements (K, Ca, Mg, Na, Cl, Mn, Fe, Cu, and Zn) and 28 non-essential elements in tobacco plant (leaves, stem, and root) of Northeast India and their respective soils were quantitatively measured. The concentrations of Hg in all samples...
The CUPAC NE Collaboration involves 20 universities, institutes and colleges from the North Eastern
states of India. Our collaborators from Indian national laboratories (BARC, IUAC, UGC-DAE CSR) and
International laboratories# bring much needed experience and expertise in experimental techniques and stellar model
codes critical to success of CUPAC mission. The long term goal of CUPAC is to...
Transverse momentum-dependent parton distributions (TMDs) factorization is a peculiar theoretical framework in QCD which aids in understanding the high-energy scattering processes. Techniques such as collinear factorization, Qiu-Sterman, soft-collinear effective theory, lattice QCD and Gaussian approximation have been employed for factorization in bag model, light-front constituent quark...
In areca nut and husk, fourteen elements (As, Ca, Cd, Cl, Co, Cu, K, Mg, Mn, Na, Rb, Sb, & Zn) were determined, while 34 elements including rare earth elements were detected in the corresponding soil samples using instrumental neutron activation analysis and Atomic Absorption Spectrometry methods, whereas the concentration levels of Hg in tested samples are negligible, perhaps, below the...
We formulate a light-front spectator model for the proton incorporating the gluonic degree of freedom. In this model, at high energy scattering of the proton, the active parton is a gluon and the rest is viewed as a spin-1/2 spectator with an effective mass. The light front wave functions of the proton are constructed using a soft wall AdS/QCD prediction and parametrized by fitting the...
A Dual QCD formulation for SU(3) color gauge has been developed in terms of dual gauge potentials and taking into account the local as well as topological structure of the color gauge group into its dynamics. For the purpose of examining the nonperturbative characteristics of
QCD, the dynamical configuration of the resulting dual QCD vacuum and its flux tube configuration have been examined....
The Dispersal profile of the radioisotopes (Ra-226, Th-232, U-235, K-40, C-137s) along with potentially toxic elements (Cd, Co, Cr, Cu, Ni, Pb, V, Zn, and Hg) in the sediments around the Novaya Zemlya was determined. The task was fulfilled with the aid of HPGe gamma spectrometry, inductively coupled plasma optical emission spectroscopy, DMA-80 Direct Mercury Analysis System, X-ray diffraction...
In this work, we inspect the susceptibilities of the conserved charges like charge number, baryon number, and strangeness number using the Polyakov loop extended quark meson model. The effect of a finite magnetic field is studied on the fluctuations for the zero value of the chemical potential by employing Taylor's series expansion method. The impact of the finite magnetic field on the...
Investigating the properties of a non-extensive quantum chromodynamics (QCD) medium, created in heavy-ion collisions (HICs) is one of the most important topics. In this talk, we discuss some of the important properties of this particular medium like phase transitions etc in the presence of extreme conditions. We further talk about the effect of the nonextensive measure on the system's properties.
The nuclear shell model plays an important role in the pre-formation of alpha particles. It shows the existence of magic numbers, which predicts the nucleus to form a strongly bound closed shell. When the protons number (Z) or the neutrons number (A-Z) is equal to 2,8,20,28,50,82 or 126, which are known as the “Magic Numbers”. We have developed a model which we named as S-potential by...
Wet Age-related macular degeneration (wet-AMD) is a progressive neurodegenerative disease of the retina, affecting the central vision. Wet-AMD and Diabetic Retinopathy (DR) is a leading cause of irreversible vision loss, worldwide affecting the population older than 50 years. Products that significantly addresses market access representing a global ocular market of >$25B and >200M patients...
A study of the complete fusion mechanism of nuclei in nucleus-nucleus collisions is an actual task to find an unambiguous answer how fusion takes place: by nucleon transfer through the window between nuclei or as two droplets merge with each other.
The uncertainties in the experimental and theoretical estimations of the cross sections of complete fusion are related mainly with the...
During the production of ‘tuibur’, an indigenous ‘liquid’ nicotine delivery medium of Mizoram, India, the tobacco stalk ash (‘spent’ tobacco generated from the combustion of tobacco stem, petiole, and midrib) is typically dispersed in a haphazard manner. The tobacco stalk ash was investigated for the elucidation of particulate matter, polycyclic aromatic hydrocarbon (PAH) compounds and...
Magnetic fluids or ferrofluids are stable colloidal suspension of magnetic nanoparticles in a carrier liquid that can be aqueous or oil-based. Magnetic nanoparticles have generated considerable research and commercial interest due to their unique properties and wide applicability. One of the key applications for using these nanoparticles is in the field of Genomics, particularly Next...
One of the basic building blocks of the universe is protons, whose constituent particles are quarks and gluons. Gluons are the exchange particles for the strong force between quarks; we never found them in isolation. Recently in 2018, Burkert et al. [1] found very interesting pressure distributions inside the proton, whose peak value can reach up to 1035 pascals, which is even greater than the...
Presently, a group of seven PhD students is working with me and they all are working on different nuclear research programmes. We are working on surrogate reaction studies, fusion-fission studies, Neural networks
in nuclear physics as well as neutron and alpha cross-section studies with covariance analysis.
Extensive work was done under Indo Russian bilateral research programme funded by...
The method of superoperators in Liouville space was applied to study equilibrium and excited states of hot nuclei. By the example of selected iron group nuclei and neutron-rich nuclei with N$\approx$50, the influence of temperature on the rates and cross sections for various weak-interaction reactions (electron capture, inelastic neutrino scattering, etc.), which play an important role in the...
We adopted the light-front holographic QCD approach for investigating diffractive vector meson production in electron-proton collisions at HERA. Specifically, our study focuses on Rho (ρ) and Phi (ϕ) vector meson production. Our findings involves developing holographic wave functions that capture the internal structure and dynamics of these vector mesons, incorporating non-perturbative QCD...
We have addressed that during the transition from zero to finite rotation picture, a transition from isotropic to anisotropic nature of shear viscosity coefficients can be found due to Coriolis force as expected due to Lorentz force at a finite magnetic field in earlier studies on the topics of relativistic matter like quark-gluon plasma. We have done it for non-relativistic matters for...
Understanding the intricate behavior of membrane proteins, their dynamics, insertion
mechanisms, and investigating their adaptation to the lipid environment have been a popular
field of study. Besides membranous proteins, deciphering the interaction between water-
soluble, non-membranous proteins with lipids is equally important for fundamental
biophysical investigations and potential...
We study the global properties of a star made of self-gravitating Bose-Einstein Condensates Rastall, Rainbow and combined Rastall-Rainbow theories of modified gravity. By employing a relativistic and non-relativistic BEC equation of state we solve the stellar structure equations in these theories and quantify the mass and radius of the BEC stars. We also study the effect temperature on BEC...
Rotating quarks and hadronic systems, produced in peripheral heavy ion collisions, can experience Coriolis force and other forces due to rotational motion. Considering only the effect of Coriolis force, we have calculated the electrical conductivity for non-relativistic rotating matter using the Relaxation Time Approximation based Boltzmann transport equation. A similarity in mathematical...
Monitoring of uranium content in groundwater of radiologically active areas is a vital step for establishing baseline of environment protection. In this regard, 64 groundwater samples collected post-monsoon from handpumps or dug wells in Bathinda district of Punjab were analysed by LED fluorimeter for analysis of uranium concentration and associated health risks. Uranium content varied from...
Nand Lal Singh1 and Rajnikant Makwana2
1,2Department of Physics, Netaji Subhas University of Technology, New Delhi-110078, India
2Department of Physics, M.S.University of Baroda, Vadodara-390 002, India
E-mail:nand.lal@nsut.ac.in
The development of reactor technology demands high-quality nuclear data for the materials used in the reactors. There are several materials used in a reactor...
The fission fragment mass and kinetic-energy distribution measurements of the low-energy fission of actinides show significant structural deviations from those expected in the liquid drop model (LDM) of a nucleus [1]. The super asymmetric mode due to the influence of double magic Ca (Z= 20, N = 28) and double magic Pb (Z = 82, N = 126) has been observed in the fission of excited $^{260}$No...
Heavy-ion fusion reaction dynamics in the vicinity of the Coulomb barrier have been an active field of investigation over the past few decades. The fusion and Multi-Nucleon Transfer (MNT) reactions are elemental for the synthesis of exotic nuclei away from the valley of stability. These studies can further be extrapolated to extremely lower energies, where the reaction dynamics can shed some...
The existence of spin-paired proton and neutron quartets in light nuclei is a key factor that drives the formation of alpha particles in nuclear reactions and decays [1]. The investigations of ensembles with several alpha particles can clarify the $^8$Be and $^9$B and their analogues states and it make possible to study the 3$\alpha$ Hoyle state (HS). In this prospects, the BECQUEREL...
Despite extensive efforts, comprehending the bulk rearrangement of nuclear matter during fission of a compound nucleus (CN) remains elusive. The main challenge is to unravel and subsequently model the role of various collective and intrinsic variables governing the process. Neutrons emitted from the CN as it goes through multiple shape deformations between the equilibrium state and the...
To portray the internal structure of low-lying octet baryons, the understanding of the intrinsic properties of their building blocks i.e., quarks and gluons is indispensable. We present the study of spatial distribution of quark charges via generalized parton distribution in the impact parameter space. This structural anatomization is carried out by making the use of quark-scalar diquark model...
Numerous technical applications of perovskite-type (ABO3-δ) oxides exist, such as oxygen sensors, solid oxide fuel cells, oxidative coupling of methane, oxygen pumps, solar cells, hydrogen storage, and gas separation [1-6]. By appropriately partly replacing cations A and B, their characteristics can be controlled accurately. Cerium and zirconium-doped (BaSr)(Fe1-x-yCexZry)O3-δ (x = y= 0 –1.0)...
Understanding the physical and molecular mechanism of the interaction of surfaces, nano- and microparticles with DNA represents a great interest in today's biomedical applications. Nucleic acids have crucial biological functions in gene storage, replication, repair, and gene regulation. Due to the negatively charged phosphate backbones of ss-DNA, it is intrinsically polyanionic in nature. This...
Physicists were able to create new and unstable heavy elements in the 1940's. With the discovery and development of new superheavy materials, researchers' interest has not stopped, leading to concepts such as "Island of Stability" and "Sea of Instability." The MASHA (Mass Analyzer of Super Heavy Atoms) mass spectrometer at JINR was designed for the identification and measurement of physical...
Pion Femtoscopy, a sophisticated technique in particle physics, is employed to unveil correlations among pion particles from the source’s homogeneity region. Our analysis of collider data from the STAR BES II experiment, focusing on √sNN = 7.7 GeV collisions, explores the correlation function across centrality and transverse momentum (KT ) intervals. To ensure robust results, I meticulously...
