S.U. Pandey
A5071155294- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Spectroscopy and Quantum Chemical Studies
- Laser-Matter Interactions and Applications
- Electromagnetic Simulation and Numerical Methods
- Nuclear physics research studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Spectroscopy and Laser Applications
- Superconducting Materials and Applications
- Nuclear reactor physics and engineering
- Electromagnetic Scattering and Analysis
- Statistical Methods and Bayesian Inference
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Rocket and propulsion systems research
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor Quantum Structures and Devices
- Markov Chains and Monte Carlo Methods
- Random lasers and scattering media
- Pulsars and Gravitational Waves Research
- Optical properties and cooling technologies in crystalline materials
- Magnetic confinement fusion research
- Ultrasound and Cavitation Phenomena
- Boron and Carbon Nanomaterials Research
Purdue University West Lafayette
2021-2024
Chandigarh University
2023
Institute of High Energy Physics
2019
Worcester Polytechnic Institute
2017-2019
Wayne State University
1998-2004
The Ohio State University
1995-2002
European Organization for Nuclear Research
1998-2002
Brookhaven National Laboratory
1994-2002
Rudjer Boskovic Institute
1999
Lund University
1999
Optically active spin defects in wide-bandgap materials have many potential applications quantum information and sensing. Spin two-dimensional layered van der Waals are just emerging to be investigated. Here we demonstrate that optically-addressable ensembles hexagonal boron nitride (hBN) can generated by femtosecond laser irradiation. We observe optically detected magnetic resonance (ODMR) of hBN created show the creation is strongly affected pulse energy laser. When number less than a few...
Transverse mass spectra of pions, kaons, and protons from the symmetric heavy-ion collisions 200 $A$ GeV $\mathrm{S}+\mathrm{S}$ 158 $\mathrm{Pb}+\mathrm{Pb}$, measured in NA44 focusing spectrometer at CERN, are presented. The dependence slope parameters provides evidence collective transverse flow expansion system induced central collisions.
E896 has measured Lambda production in 11.6A GeV/c Au-Au collisions over virtually the whole rapidity phase space. The midrapidity p(t) distributions have been for first time at this energy and appear to indicate that hyperons different freeze-out conditions than protons. A comparison with relativistic quantum molecular dynamics model shows while there is good shape agreement high predicts significantly slopes of m(t) spectra midrapidity. data, where overlap occurs, are consistent previously...
Two-pion correlations from Pb+Pb collisions at 158 GeV/c per nucleon are measured by the NA44 experiment CERN. Multidimensional fits characterize emission volume, which is found to be larger than in S-induced collisions. Comparison RQMD model used relate fit parameters actual volume.Received 5 May 1998DOI:https://doi.org/10.1103/PhysRevC.58.1656©1998 American Physical Society
The NA44 experiment has measured single-particle inclusive spectra for charged pions, kaons, and protons as a function of transverse mass near midrapidity in 158AGeV/c Pb+Pb collisions. From the particle dependence observed mT distributions, we are able to deduce value about 120 MeV temperature at thermal freeze-out. ratios rapidity densities, find values chemical potentials light strange quarks freeze-out approximately 140 MeV.Received 20 February...
Proton distributions at mid-rapidity (2 ≤ y 3) have been measured for 158A·GeV Pb+Pb collisions in the focusing spectrometer experiment NA44 CERN. From baryon number conservation and by comparing experimentally dNdy distribution with transport model RQMD, we conclude that a rather high degree of nuclear stopping has reached truly heavy-ion these energies. Transverse mass exhibit characteristically thermal shapes slope parameters increase colliding system.
Two-particle interferometry of positive kaons is studied in Pb+Pb collisions at mean transverse momenta <p(T)> approximately 0.25 and 0.91 GeV/c. A three-dimensional analysis was applied to the lower p(T) data, while a two-dimensional used for higher data. We find that source-size parameters are consistent with m(T) scaling curve observed pion-correlation measurements same collisions, duration time kaon emission zero within experimental sensitivity.
In an ultrafast nonlinear optical interaction, the electric field of emitted signal provides direct access to induced transient polarization or currents and thus carries signatures dynamics in a medium. Measurement such signals offers sensitive observables track electron various systems. this work, we resolve real-time phase femtosecond third-order molecular frame. The from impulsively pre-aligned gas-phase molecules at room temperature, degenerate four-wave mixing scheme, is measured using...
We have measured the production of light nuclei (A<~3) in 11.6GeV/c Au-Au collisions at Brookhaven Alternating Gradient Synchrotron (AGS). The transverse mass spectra are analyzed using a thermal fireball model, and yields for different particle species discussed assuming coalescence fragmentation as possible mechanisms. wide acceptance range 3He measurements permits broad study parameter B3 functions momentum rapidity. Comparisons with data obtained previously AGS energies suggest that...
3pi- correlations from Pb+Pb collisions at 158 GeV/c per nucleon are presented as measured by the focusing spectrometer of NA44 experiment CERN. The three-body effect is found to be stronger for PbPb than SPb. two-dimensional three-particle correlation function also and longitudinal extension source larger transverse extension.
Experiment NA44 has measured proton and antiproton distributions at midrapidity in sulphur collisions with nuclear targets 200 450GeV/c per nucleon respectively. The inverse slopes of transverse mass increase system size for both protons antiprotons but are slightly lower antiprotons. This could happen if annihilated the medium. yield increases centrality is largest midrapidity. also centrality, decreases from backward rapidity to stopping these energies lies between full transparency...
The invariant cross section as a function of transverse momentum for antideuterons produced in $158A\mathrm{GeV}/c$ per nucleon $\mathrm{Pb}+\mathrm{Pb}$ central collisions has been measured by the NA44 experiment at CERN. This measurement, together with measurement antiprotons, allows determination antideuteron coalescence parameter. extracted radius is found to agree deuteron and radii determined from two particle correlations.
The NA44 collaboration has measured charged kaon and pion distributions at midrapidity in sulphur proton collisions with nuclear targets 200 450 GeV/c per nucleon, respectively. inverse slopes of kaons are larger than those pions. difference the pions, protons, all our spectrometer, increases system size is consistent buildup collective flow for systems. target dependence both yields stronger beam suggesting increased importance secondary rescattering SA reactions. rapidity density, dN/dy,...
π+π+ and π−π− correlations from 200 GeV per nucleon S + Pb collisions 450 p measured by the focussing spectrometer of CERN experiment NA44 are presented. The large data set which emphasizes small values momentum difference allows multi-dimensional analysis along with more traditional one-dimensional parameterization to characterize pion emission source. It is found that three radius parameters similar compared projectile radius. This can be explained scattering in final state hadronic system.
Sonoluminescence may be studied in detail by intensity correlations among the emitted photons. As an example, we discuss experiment to measure size of light-emitting region Hanbury Brown-Twiss effect. We show that single bubble sonoluminescence is almost ideally suited for study this method and plausible values physical parameters are within easy experimental reach. A sequence two higher order photon correlation experiments outlined.