A5003265967- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Advanced Chemical Physics Studies
- Radiation Detection and Scintillator Technologies
- Nuclear Materials and Properties
- Particle Detector Development and Performance
- Cold Fusion and Nuclear Reactions
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Particle accelerators and beam dynamics
- Rare-earth and actinide compounds
- Mass Spectrometry Techniques and Applications
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Radiation Therapy and Dosimetry
- Advanced NMR Techniques and Applications
- Quantum chaos and dynamical systems
- Muon and positron interactions and applications
- Guidance and Control Systems
Inter-University Accelerator Centre
2016-2024
Bhabha Atomic Research Centre
2010-2022
Maharaja Sayajirao University of Baroda
2016-2020
Panjab University
2018
University of Geneva
2017
Bhabha Atomic Research Center Hospital
2011-2013
Indian Space Research Organisation
2012
Centre National de la Recherche Scientifique
2008
GANIL
2008
Institut National de Physique Nucléaire et de Physique des Particules
2008
Fission-fragment angular distributions in reactions of $^{10}\mathrm{B}$, $^{12}\mathrm{C}$, $^{16}\mathrm{O}$${+}^{232}$Th and $^{237}\mathrm{Np}$, $^{19}\mathrm{F}$${+}^{237}$Np have been measured. While the measured anisotropies B- C-induced fission are found to be agreement with predictions standard Halpern-Strutinsky theory, they anomalously large case O- F-induced fission. Such a discontinuous behavior anisotropy respect entrance-channel mass-to-charge asymmetry provides an...
A modern variation of the Rutherford experiment to probe tunneling exotic nuclear matter from measurement residues formed in bombardment (197)Au by extremely neutron-rich (8)He nuclei is presented. Using a novel off-beam technique most precise and accurate measurements fusion neutron transfer involving reaccelerated unstable beams are reported. The results show unusual behavior compared that for lighter helium isotopes, highlighting role intrinsic structure composite many-body quantum...
Angular distributions for $1n$ and $2n$ transfer are reported the $^{6}\mathrm{He}+^{65}\mathrm{Cu}$ system at ${E}_{\mathrm{lab}}=22.6\text{ }\text{ }\mathrm{MeV}$. For first time, triple coincidences between $\ensuremath{\alpha}$ particles, neutrons, characteristic $\ensuremath{\gamma}$ rays from targetlike residues were used to separate contributions arising transfer. The differential cross sections these channels, elastic scattering, fusion analyzed using a coupled reaction channels...
The excitation function for the complete fusion of $^{9}\mathrm{Be}$$+$$^{89}\mathrm{Y}$ has been measured at near-barrier energies, and barrier distribution extracted from data. Coupled-channels calculations have carried out to understand effect coupling both projectile target excitations on above quantities. cross sections, especially above-barrier found be suppressed by ($20\ifmmode\pm\else\textpm\fi{}5$)% compared ones predicted coupled-channels that do not include couplings continuum,...
The prompt $\ensuremath{\gamma}$-$\ensuremath{\gamma}$ coincidence technique has been used to carry out the spectroscopic study of level schemes and derive relative isotopic yield distributions fission fragment nuclei employing ${}^{235}$U(${n}_{th}$, $f$) reaction for first time. From rates various Ba isotopes with ${}^{90}$Kr nucleus Sr ${}^{138}$Xe nucleus, it found that either $2n$ or $3n$ neutron evaporation channels dominate during process. average angular momenta three complementary...
Fusion and quasi-elastic scattering measurements have been carried out for $^{6,7}\mathrm{Li}$+$^{197}\mathrm{Au}$ systems in the energy range $E/{V}_{b}\ensuremath{\sim}0.7$ to 1.5. Coupled-channel calculations including coupling inelastic states of target projectiles are able explain an enhancement measured fusion cross sections at energies below barrier. At above barrier complete found be suppressed compared coupled-channel predictions both systems. A systematic comparison weakly bound...
Prescission neutron multiplicities in fusion-fission reactions of $^{11}\mathrm{B}$${+}^{237}$Np, $^{11}\mathrm{B}$${+}^{232}$Th, $^{12}\mathrm{C}$${+}^{232}$Th, and $^{16}\mathrm{O}$${+}^{232}$Th, lying on either side the Businaro-Gallone mass asymmetry (${\mathrm{\ensuremath{\alpha}}}_{\mathrm{BG}}$), have been measured. The present data along with those available literature for compound systems spanning fissility range from 0.70 to 0.84 were analyzed a consistent manner deduce time scales...
Reactions induced by radioactive $^{6,8}\mathrm{He}$ beams from the SPIRAL facility were studied on $^{63,65}\mathrm{Cu}$ and $^{188,190,192}\mathrm{Os}$ targets compared to reactions with stable $^{4}\mathrm{He}$ projectiles Mumbai Pelletron. Partial residue cross sections for fusion neutron transfer obtained measured intensities of characteristic in-beam $\ensuremath{\gamma}$ rays $^{6}\mathrm{He}+^{63,65}\mathrm{Cu}$ systems are presented. Coincidence measurements heavy reaction products,...
A velocity slice imaging method is developed for measuring the angular distribution of fragment negative ions arising from dissociative electron attachment (DEA) to molecules. low energy pulsed gun, a field ion extraction, and two-dimensional position sensitive detector consisting microchannel plates wedge-and-strip anode are used this purpose. Detection storage each separately its flight time allows analysis data offline any given slice, without resorting pulsing bias. The performance...
Complete fusion excitation functions for B11,10+Tb159 have been measured at energies around the respective Coulomb barriers, and existing complete measurements Li7+Tb159 extended to higher energies. The show significant reduction of cross sections above-barrier both reactions, B10+Tb159 Li7+Tb159, when compared those B11+Tb159. comparison shows that extent suppression is correlated with α-separation projectiles. Also, two were found produce incomplete products near α-particle emitting...
Complete fusion cross sections have been measured using the off-line $\ensuremath{\gamma}$-ray spectroscopy method for ${}^{6}$Li+${}^{90}$Zr system around barrier energies. Statistical and coupled-channel calculations performed to investigate effect of coupling on complete fusion. It is observed that suppressed by 34 $\ifmmode\pm\else\textpm\fi{}$ 8$%$ compared coupled channel predictions. The breakup estimated continuum discretized channels (CDCC) it found reduce probability. Contrary...
Results for the cross section and average angular momentum complete fusion at energies around Coulomb barrier are presented 7Li with 165Ho. Comparison of sections a one-dimensional penetration model, using potential consistent measured elastic scattering, showed reduction above an enhancement below it. An increase in momentum, <l>, its consistency that obtained from excitation function weakly bound nuclei, is reported. These results together reanalysis existing data conclusively demonstrate...
The exclusive projectile breakup cross section in the Li6+Bi209 reaction has been measured at Elab=40 and 36 MeV. sequential breakup, via resonant state (3+, 2.18 MeV) of 6Li continuum, dominates total α+d breakup. inclusive α is, however, much larger implying that other competing processes contribute to α-particle yields. corrected yields corresponding two peaks or d spectra were seen be asymmetric. average data are good agreement with continuum discretized coupled channels (CDCC)...
Results of measurement residues formed in fusion $^{6}\mathrm{Li}$ with $^{198}\mathrm{Pt}$ the energy range $0.68<E/{V}_{b}<1.3$ using a new sensitive off-beam technique are reported. The excitation function and derived average angular momenta do not indicate change slope at deep sub-barrier energies, contrary to recent observations. present results for system weakly bound projectile confront current understanding hindrance these low underlying role internal reorganization on dynamical path...
Differential cross sections for elastic-scattering and neutron-transfer reactions along with fusion in the $^{8}\mathrm{He}$$+$$^{65}\mathrm{Cu}$ system are reported at energies above Coulomb barrier (${E}_{\mathrm{lab}}=$ $19.9$ $30.6$ MeV). The present work demonstrates feasibility of using inclusive measurements characteristic in-beam $\ensuremath{\gamma}$ rays low-intensity ($~$$10$${}^{5}$ pps) radioactive ion beams to obtain residue neutron transfer. Exclusive coincidence light charged...
An earlier measurement on the ${4}^{+}$ to ${2}^{+}$ radiative transition in $^{8}\mathrm{Be}$ provided first electromagnetic signature of its dumbbell-like shape. However, large uncertainty measured cross section does not allow a stringent test nuclear structure models. This Letter reports more elaborate and precise for this transition, via capture $^{4}\mathrm{He}+^{4}\mathrm{He}$ reaction, improving accuracy by about factor 3. Ab initio calculations strength with improved three-nucleon...
Prescission neutron, proton, and \ensuremath{\alpha}-particle multiplicities for the reaction $^{28}\mathrm{Si}$+$^{175}\mathrm{Lu}$ at 159 MeV were measured simultaneously. The multiplicity data analyzed using deformation dependent particle transmission coefficients, binding energies, level densities to extract fission time scales mean of saddle-to-scission emitter. neutron charged could be explained consistently, a better fit being obtained by considering emission neutrons favored toward...
Inclusive breakup $\ensuremath{\alpha}$ cross sections (${\ensuremath{\sigma}}_{\ensuremath{\alpha}}^{\mathrm{incl}}$) are measured for the ${}^{6}$Li + ${}^{209}$Bi reaction at bombarding energies ${E}_{\mathrm{lab}}=24$--50 MeV. The ${\ensuremath{\sigma}}_{\ensuremath{\alpha}}^{\mathrm{incl}}$ was observed to be a substantial fraction of total section over entire energy range, and it exhausts almost whole sub-barrier energies. An investigation on origin large inclusive reveals that most...
Elastic, inelastic, and transfer angular distributions were measured for ${}^{12}\mathrm{C}{+}^{208}\mathrm{Pb}$ in the energy range from 58.9 to 84.9 MeV. While fission fragment over 79 MeV, residue cross sections after $2n$ evaporation compound nucleus ${(}^{220}\mathrm{Ra})$ by $\ensuremath{\alpha}$ counting at 58.9, 60.9, 62.9 Combining above data with ones literature, fusion have been obtained. Quasielastic excitation function $170\ifmmode^\circ\else\textdegree\fi{}$ was also obtain...
Quasi-elastic-scattering and transfer reaction cross-section measurements were made for the $^{7}\mathrm{Be}+^{27}\mathrm{Al}$ system at ${E}_{\mathrm{lab}}=17$, 19, 21 MeV in angular range ${\ensuremath{\theta}}_{c.m.}={12}^{\ifmmode^\circ\else\textdegree\fi{}}\ensuremath{-}{43}^{\ifmmode^\circ\else\textdegree\fi{}}$. An optical model (OM) analysis of quasi-elastic scattering data was carried out. The fusion cross sections derived these energies by subtraction integrated from obtained fits...