A5051823583- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Advanced NMR Techniques and Applications
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Radiation Therapy and Dosimetry
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Molecular spectroscopy and chirality
- Cold Atom Physics and Bose-Einstein Condensates
- Crystallography and Radiation Phenomena
- Solid-state spectroscopy and crystallography
- Astro and Planetary Science
- Advanced Mathematical Theories
- X-ray Spectroscopy and Fluorescence Analysis
- Particle accelerators and beam dynamics
- Scientific Measurement and Uncertainty Evaluation
- Laser-Plasma Interactions and Diagnostics
Variable Energy Cyclotron Centre
2013-2024
Homi Bhabha National Institute
2017-2024
Bhabha Atomic Research Center Hospital
2021
Bhabha Atomic Research Centre
1976-2017
New Mexico State University
1994-1996
Northwestern University
1985
Oak Ridge National Laboratory
1982
We present the first experimental giant dipole resonance (GDR) width systematics, in temperature region 0.8–1.2 MeV for 201Tl, a near Pb nucleus, to investigate evolution of GDR shell effect and pairing dominated region. The extracted widths are well below predictions corrected thermal shape fluctuation model (TSFM) included phonon damping model. A similar behavior is also observed 63Cu measured work 119Sb, earlier. This discrepancy attributed induced quadrupole moment leading critical point...
The influence of $\ensuremath{\alpha}$ clustering on nuclear reaction dynamics is investigated using the giant dipole resonance (GDR) lineshape studies in reactions $^{20}\mathrm{Ne}$ (${E}_{\mathrm{lab}}=145,160$ MeV) $+$ $^{12}\mathrm{C}$ and (${E}_{\mathrm{lab}}=160$ $^{27}\mathrm{Al}$, populating $^{32}\mathrm{S}$ $^{47}\mathrm{V}$, respectively. GDR lineshapes from two systems are remarkably different each other. Whereas, non-$\ensuremath{\alpha}$-like $^{47}\mathrm{V}$ undergoes Jacobi...
The energy spectrum of the high γ-rays in coincidence with prompt has been measured for spontaneous fission 252Cf. nucleus–nucleus coherent bremsstrahlung accelerating fragments is observed and result substantiated a theoretical calculation based on Coulomb acceleration model. width giant dipole resonance (GDR) decay from excited extracted first time compared thermal shape fluctuation model (TSFM) liquid drop formalism. GDR significantly smaller than predictions TSFM.
The systematic study of the correlation between experimental giant dipole resonance (GDR) width and average deformation nucleus at finite excitation is presented for mass region A ~ 59 to 208. We show that GDR (Γ) quadrupole do not follow a linear relation, as predicted earlier, due induced moment also depends on nuclei. different empirical values extracted from match exceptionally well with thermal shape fluctuation model. As result, this universal Γprovides direct probe determine nuclear...
Elastic scattering angular distribution measurements of the weakly bound ${}^{6,7}$Li projectiles on a ${}^{232}$Th target have been carried out at different bombarding energies close to Coulomb barrier. The data analyzed for both systems using optical model ecis code with phenomenological Woods-Saxon and Sao Paulo double-folding forms potentials. energy dependence volume-type real imaginary parts potentials are derived from best fit experimental data. usual threshold anomaly has observed...
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}$26 MeV) for nuclei large...
We present, for the first time, simultaneous determination of shear viscosity ($\ensuremath{\eta}$) and entropy density ($s$) thus, $\ensuremath{\eta}/s$ equilibrated nuclear systems from $A\ensuremath{\sim}30$ to $A\ensuremath{\sim}208$ at different temperatures. At finite temperature, $\ensuremath{\eta}$ is estimated by utilizing $\ensuremath{\gamma}$ decay isovector giant dipole resonance populated via fusion evaporation reaction, while $s$ evaluated level parameter ($a$) temperature...
We present a probable experimental signature of collective enhancement in the nuclear level density (NLD) by measuring neutron and giant dipole resonance (GDR) $\gamma$ rays emitted from rare earth $^{169}$Tm compound nucleus populated at 26.1 MeV excitation energy. An enhanced yield is observed both ray spectra corresponding to same energy daughter nuclei. The could only be reproduced including factor Fermi gas model NLD explain GDR simultaneously. results show that relative order 10...
The excited states in the transitional nucleus $^{131}\mathrm{Xe}$ have been populated by using $\ensuremath{\alpha}$-induced fusion-evaporation reaction and de-exciting $\ensuremath{\gamma}$ rays were detected with Compton suppressed clover detector setup of Indian National Gamma Array coupled to digital data acquisition system. existing level structure has significantly extended observation placement 72 new $\ensuremath{\gamma}$-ray transitions. use light-ion ($\ensuremath{\alpha}$) beam...
The inclusive energy distributions of fragments with Z $\geq$ 3 emitted from the bombardment $^{12}$C by $^{20}$Ne beams incident energies between 145 and 200 MeV have been measured in angular range $\theta_{lab} \sim$ 10$^\circ$ - 50$^\circ$. Damped fragment yields all cases found to be characteristic emission fully equilibrated composites; for B, C fragments, average Q-values, $<Q>$, were independent centre mass angle ($\theta_{c.m}$), followed $\sim$1/sin$\theta_{c.m}$ like variation,...
High energy \ensuremath{\gamma} rays in coincidence with low yrast have been measured from $^{113}\mathrm{Sb}$, at excitation energies of 109 and 122 MeV, formed by bombarding $^{20}\mathrm{Ne}$ on $^{93}\mathrm{Nb}$ projectile 145 160 respectively, to study the role angular momentum ($J$) temperature ($T$) over giant dipole resonance (GDR) width (\ensuremath{\Gamma}). The maximum populated momenta for fusion were $67\ensuremath{\hbar}$ $73\ensuremath{\hbar}$, above-mentioned beam energies....
The inclusive energy distributions of the complex fragments ($3\ensuremath{\leqslant}Z\ensuremath{\leqslant}7$) emitted from bombardment $^{12}\mathrm{C}$ by $^{20}\mathrm{Ne}$ beams with incident energies between 145 and 200 MeV have been measured in angular range ${10}^{\ifmmode^\circ\else\textdegree\fi{}}\ensuremath{\leqslant}{\ensuremath{\theta}}_{\mathrm{lab}}\ensuremath{\leqslant}{50}^{\ifmmode^\circ\else\textdegree\fi{}}$. Damped fragment yields all cases found to characteristic...
The collective rotational enhancement in the nuclear level density (NLD) arising due to deformation is still not well understood sparse experimental findings. To address this issue, angular momentum (J) gated neutron, proton and GDR γ-ray spectra have been measured from two deformed nuclei (169Tm 185Re) one near spherical nucleus (201Tl) by populating them around 26 MeV excitation energy. An enhanced yield compared statistical decay observed all three (p, n, γ) for both but only nucleus....