A5027270842- Nuclear physics research studies
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Astro and Planetary Science
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Isotope Analysis in Ecology
- Neutrino Physics Research
- Nuclear Materials and Properties
- Quantum Mechanics and Non-Hermitian Physics
- Protease and Inhibitor Mechanisms
- Magnetic confinement fusion research
- Radiation Therapy and Dosimetry
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum Information and Cryptography
- SAS software applications and methods
- Cold Atom Physics and Bose-Einstein Condensates
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Quantum Mechanics and Applications
Indian Institute of Technology Roorkee
2024
Variable Energy Cyclotron Centre
2012-2021
Inter-University Accelerator Centre
2019-2021
Hebrew University of Jerusalem
2019-2021
Panjab University
2021
Saha Institute of Nuclear Physics
2019
Homi Bhabha National Institute
2016-2017
National Council Of Educational Research And Training
1998
A high-statistics, high-resolution, complete kinematical measurement has been performed to estimate the quantitative contributions of various direct 3$\ensuremath{\alpha}$ decay mechanisms in famous Hoyle state, ${0}_{2}^{+}$ resonant excited state ${}^{12}$C at an excitation energy 7.654 MeV, using inelastic scattering 60-MeV $\ensuremath{\alpha}$ particles on ${}^{12}$C. The present observation nonzero branching ratios modes, which have extracted...
Precise estimation of the rare direct 3α decay Hoyle state 12C has been made to unveil its unusual α-cluster configurations ranging from linear chain structure diffuse Bose gas as well Einstein condensate. The present new high precision, nearly zero background experimental study with 1.6×105 events converged on upper limit for at ∼0.019% 95% confidence limit, which is more than a factor 2 lower obtained in previous studies.
Neutron evaporation spectra at backward angles from ${}^{201}$Tl${}^{*}$, ${}^{185}$Re${}^{*}$, and ${}^{169}$Tm${}^{*}$ compound nuclei, having different ground-state deformations, have been measured two excitation energies (${E}^{*}$ $\ensuremath{\sim}$ 37 26 MeV). The values of the inverse level density parameter ($k$), extracted these excitations using statistical model calculations, are observed to decrease substantially lower energy ($\ensuremath{\sim}$26 MeV) for nuclei large...
Constraining the excitation energy at which nuclear shell effect washes out has important implications on production of superheavy elements and many other fields physics research. We report fission fragment mass distribution in $\ensuremath{\alpha}$ induced reaction an actinide target for wide range close interval show direct evidence that $\ensuremath{\sim}40$ MeV. The calculation shows second peak barrier also vanishes around similar energy.
The excited states of $^{209}\mathrm{Rn}$ ($Z=86, N=123$) have been populated by the heavy-ion induced fusion evaporation reaction $^{198}\mathrm{Pt}(^{16}\mathrm{O},5n)^{209}\mathrm{Rn}$ at a beam energy 102 MeV. de-excited $\ensuremath{\gamma}$ rays were detected with Compton suppressed clover HPGe detectors Indian National Gamma Array (INGA) set-up. high spin spectroscopic study has carried out up to an excitation 7.9 MeV and (55/2)$\ensuremath{\hbar}$. Spin-parity assignments levels...
Light particle ($n$, $p$, and $\ensuremath{\alpha}$) evaporation spectra have been measured in coincidence with $\ensuremath{\gamma}$ rays of different multiplicities, emitted from ${}^{97}$Tc${}^{*}$ ${}^{62}$Zn${}^{*}$ compound systems at the excitation energies $\ensuremath{\sim}36$ MeV. Statistical model analysis experimental data carried out to extract value inverse level density parameter ($k$) angular momentum regions, corresponding multiplicity. A systematic trend a decrease increase...
Background: In heavy-ion induced reactions, the sub-barrier fusion cross sections are found to be higher as compared predictions of one-dimensional barrier penetration model. Attempts have been made explain enhancement by including static deformations, couplings inelastic excitations, and non-fusion channels.Purpose: To investigate factors which influence in $^{37}\mathrm{Cl}+^{130}\mathrm{Te}$ system understand interplay couplings, excitation function was measured at energies from $10%$...
The fission fragment mass distributions have been measured in the reactions $^{16}\mathrm{O}+\phantom{\rule{0.16em}{0ex}}^{184}\mathrm{W}$ and $^{19}\mathrm{F}+\phantom{\rule{0.16em}{0ex}}^{181}\mathrm{Ta}$ populating same compound nucleus ${^{200}\mathrm{Pb}}^{*}$ at similar excitation energies. It is found that widths of increase monotonically with energy, indicating absence quasifission for both reactions. This contrary to two recent claims presence above-mentioned
The role of $\ensuremath{\alpha}$ clustering in the binary complex fragment decay fully energy-relaxed composites $^{24,25}\mathrm{Mg}^{*}$, formed $^{12,13}\mathrm{C}+^{12}\mathrm{C}$ reactions, has been studied. inclusive isotopic energy distributions emitted fragments $^{6,7}\mathrm{Li}$ and $^{7,8,9}\mathrm{Be}$ have measured. ratio measured dissipative (fissionlike) yields each obtained two reactions was compared with corresponding statistical model prediction same. Unlike case...
Mass distributions of the fragments in fission $^{206}\mathrm{Po}$ and $N=126$ neutron shell closed nucleus $^{210}\mathrm{Po}$ have been measured. No significant deviation mass has found between $^{210}\mathrm{Po}$, indicating absence correction at saddle point both nuclei, contrary to reported angular anisotropy prescission multiplicity results. This result provides benchmark data test new dynamical models study effect on potential energy surface point.
Neutron evaporation spectra along with $\ensuremath{\gamma}$ multiplicity has been measured from $^{201}\mathrm{Tl}{}^{*},^{185}\mathrm{Re}{}^{*}$, and $^{169}\mathrm{Tm}{}^{*}$ compound nuclei at the excitation energies of $\ensuremath{\sim}27$ 37 MeV. Statistical model analysis experimental data carried out to extract value inverse level density parameter $k$ different angular-momentum $(J)$ regions corresponding multiplicities. It is observed that, for present systems remains almost...
The $^{27}\mathrm{Al}(d,t)$ reaction has been studied to extract spectroscopic information for the odd-odd nucleus $^{26}\mathrm{Al}$. excited states of $^{26}\mathrm{Al}$ up 5.50 MeV have analyzed using local, zero range distorted wave Born approximation. A new set optical model potential parameters was extracted from measured elastic scattering angular distribution. factors calculated these are found be in good agreement with previously reported values same; they also those obtained shell...
Measurements of cross sections evaporation residue (ER) and spin distributions heavy nuclei, produced via compound nuclear fusion-evaporation reactions, provide crucial information about the dynamics fission survival probability system against fission. Such measurements help in probing evolution from equilibrium to saddle underlying role dissipation hindering The purpose present is understand 224Th∗ nucleus its dependence on angular momentum. ER have been carried out for 16O+208Pb 18O+206Pb...
Background: The influence of shell effect on the dynamics fusion fission process and it's evolution with excitation energy in pre-actinide Hg-Pb region general is a matter intense research recent years. In particular, strong ambiguity remains for neutron closed $^{210}$Po nucleus regarding role around $\approx$ 30 - 40 MeV energy. Purpose: We have measured fragment mass distribution populated using $^{4}$He + $^{206}$Pb at different energies compare result theoretical predictions as well our...
Evaporation residue cross sections are measured for the reaction $^{48}\mathrm{Ti}+^{138}\mathrm{Ba}$ which forms compound nucleus ${}^{186}{\mathrm{Pt}}^{*}$. The at beam energies in range of 189.3--234.4 MeV. experimental evaporation compared with dynamical model employs one-dimensional Langevin calculations. dissipation strength equation is calculated using both chaos weighted wall formula and a constant reduced function. ER found to be much less than theoretical predictions. Further,...
Neutron evaporation spectra alongwith γ-multiplicity has been measured from the 185Re* compound nucleus at excitation energies ~27 and 37 MeV. Statistical model analysis of experimental data carried out to extract value inverse level density parameter k different angular momentum regions (J) corresponding γ-multiplicity. It is observed that, for present system remains almost constant J. The results on dependence nuclear (NLD) ã (=A/k), nuclei with A ~180 quite our earlier measurements in...
The even-even nucleus $^{26}\mathrm{Mg}$ has been studied through the reaction $^{27}\mathrm{Al}(d,^{3}\mathrm{He})$ at 25 MeV beam energy. spectroscopic factors of lowest $(T=1)$ states have extracted using zero-range distorted wave Born approximation. These are compared with those $T=1$ analog in $^{26}\mathrm{Al}$ and found to be good agreement.
Background: The experimental knowledge of nuclear reaction data and decay properties plays a vital role in searching for novel exotic radioisotopes, prompting us to widen the study heavy-ion induced reactions.Purpose: aim is production mass separated (i.e., separation different masses residues, where each group consists isobaric nuclei) evaporation residues (ERs) populated $^{32}\mathrm{S}+^{70}\mathrm{Zn}$ $^{32}\mathrm{S}+^{68}\mathrm{Zn}$ reactions within 115--135 130--150 MeV incident...
The complex fragment emission from the decay of fully energy-relaxed composite, $^{44}\mathrm{Ti}^{*}$ formed via $^{32}\mathrm{S}+^{12}\mathrm{C}$ reaction at two excitation energies, have been studied. Inclusive energy distributions fragments ($3\ensuremath{\le}Z\ensuremath{\le}8$) emitted in measured angular range $\ensuremath{\sim}{16}^{\ensuremath{\circ}}--{28}^{\ensuremath{\circ}}$, incident 200 and 220 MeV, respectively. Damped yields all cases found to characteristic...
Fragment emission mechanisms have been studied in 12C on and 13C reactions at same excitation energy. The inclusive energy distributions of the complex fragments (3≤ Z ≤ 5) emitted from composite system measured angular range 14° to 36°. present experiments performed with motivation study isotopic dependence fragment yields these two reactions. From preliminary analysis, it has observed that are a completely equilibrated long lived for both + It also neutron-rich more compared reaction.
The excited states of 26Al have been produced and studied using 27Al(d,t) reaction with 25 MeV deuteron as projectile. Optical model potential parameters were extracted from the measured elastic scattering angular distribution. Zero range distorted wave Born approximation analysis for ground 0.223 done. spectroscopic factors calculated these are found to be in good agreement previously reported values.