H. Bidaman
A5071383061- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Radiation Therapy and Dosimetry
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Cold Fusion and Nuclear Reactions
- Computational Physics and Python Applications
- Advanced NMR Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Particle Accelerators and Free-Electron Lasers
- Scientific Research and Discoveries
- Mass Spectrometry Techniques and Applications
- Superconducting Materials and Applications
- Machine Learning in Materials Science
- Astro and Planetary Science
University of Guelph
2015-2024
The excited states of N=44 ^{74}Zn were investigated via γ-ray spectroscopy following ^{74}Cu β decay. By exploiting γ-γ angular correlation analysis, the 2_{2}^{+}, 3_{1}^{+}, 0_{2}^{+}, and 2_{3}^{+} in firmly established. branching E2/M1 mixing ratios for transitions deexciting measured, allowing extraction relative B(E2) values. In particular, 2_{3}^{+}→0_{2}^{+} 2_{3}^{+}→4_{1}^{+} observed first time. results show excellent agreement with new microscopic large-scale shell-model...
Proton inelastic scattering off a neutron halo nucleus, 11Li, has been studied in inverse kinematics at the IRIS facility TRIUMF. The aim was to establish soft dipole resonance and obtain its strength. Using high quality 66 MeV 11Li beam, strongly populated excited state observed Ex=0.80 +/- 0.02 with width of 1.15 0.06 MeV. A DWBA (distorted-wave Born approximation) analysis measured differential cross section isoscalar macroscopic form factors leads conclude that this is an electric (E1)...
A campaign of Coulomb-excitation experiments to study the electromagnetic structure \(^{110}\)Cd was performed using beams \(^{14}\)N, \(^{32}\)S, and \(^{60}\)Ni. The use various reaction partners enables disentangling contributions individual matrix elements involved in excitation process, yielding, among others, a precise determination lifetime 2\(^+_2\) state \(^{110}\)Cd. Abstract Published by Jagiellonian University 2025 authors
Lifetimes of $2^+_1$ and $4^+_1$ states, as well some negative-parity non-yrast in $^{188-200}$Hg were measured using $\gamma-\gamma$ electronic fast timing techniques with the LaBr$_3$(Ce) detector array GRIFFIN spectrometer. The excited states populated $\epsilon/\beta^+$-decay $J^\pi =7^+/2^-$ $^{188-200}$Tl produced at TRIUMF-ISAC facility. deduced B(E2) values are compared to different interacting boson model predictions. precision achieved this work over previous ones allows for a...
The $\beta$-decay half-lives of $^{128\text{--}130}$Cd have been measured with the newly commissioned GRIFFIN $\gamma$-ray spectrometer at TRIUMF-ISAC facility. time structures most intense $\gamma$-rays emitted following were used to determine $^{128}$Cd and $^{130}$Cd be $T_{1/2}= 246.2(21)$ ms 126(4)$ ms, respectively. 3/2$^+$ 11/2$^-$ states $^{129}$Cd $T_{1/2}(3/2^+)= 157(8)$ $T_{1/2}(11/2^-)= 147(3)$ ms. Cd isotopes around $N=82$ shell closure are an important ingredient in...
The 8π spectrometer, installed at the TRIUMF-ISAC facility, was world's most sensitive γ-ray spectrometer dedicated to β-decay studies. A description is given of and its auxiliary detectors including plastic scintillator array SCEPTAR used for β-particle tagging Si(Li) PACES conversion electron measurements, moving tape collector, data acquisition system. recent investigation decay 124Cs study nuclear structure 124Xe, how measurements complemented previous Coulomb excitation studies,...
The half-lives of three $\ensuremath{\beta}$-decaying states $_{49}^{131}\mathrm{In}_{82}$ have been measured with the GRIFFIN $\ensuremath{\gamma}$-ray spectrometer at TRIUMF-ISAC facility to be ${T}_{1/2}(1/{2}^{\ensuremath{-}})=328(15)\phantom{\rule{0.16em}{0ex}}\mathrm{ms}$, ${T}_{1/2}(9/{2}^{+})=265(8)\phantom{\rule{0.16em}{0ex}}\mathrm{ms}$, and ${T}_{1/2}(21/{2}^{+})=323(55)\phantom{\rule{0.16em}{0ex}}\mathrm{ms}$, respectively. first observation $\ensuremath{\gamma}$ rays following...
The half-life of the superallowed Fermi ${\ensuremath{\beta}}^{+}$ emitter $^{18}\mathrm{Ne}$ has been determined via two high-precision $\ensuremath{\beta}$ counting experiments at TRIUMF's Isotope Separator and Accelerator facility. Using different $4\ensuremath{\pi}$ continuous-flow gas-proportional counters, independent measurements were made, yielding a weighted average ${T}_{1/2}=1.{66400}_{\ensuremath{-}0.00048}^{+0.00057}$ s, which is consistent with but approximately 2 times more...
The properties of a nanosecond isomer in $^{32}$Si, disputed previous studies, depend on the evolution proton and neutron shell gaps near `island inversion'. We have placed at 5505.2(2) keV with $J^π = 5^-$, decaying primarily via an $E3$ transition to $2^+_1$ state. strength 0.0841(10) W.u. is unusually small suggests that this dominated by $(νd_{3/2})^{-1} \otimes (νf_{7/2})^{1}$ configuration, which sensitive $N=20$ gap. A newly observed $4^+_1$ state 5881.4(13) keV; its energy enhanced...
The 2019 Mazurian Lakes Conference on Physics was held in Piaski, a vacation resort located at the lake of Bełdany heart Great District, from 1 st to 7 th September 2019.It 36 meeting series initiated over 50 years ago, 1968, by Professor Zdzisław Wilhelmi and his students collaborators.Throughout these years, conferences have gained world-wide reputation for their high scientific merit unique atmosphere.
Spectroscopy of doubly magic ${}_{50}^{132}{\mathrm{Sn}}_{82}$ has been performed with the GRIFFIN spectrometer at TRIUMF-ISAC following $\ensuremath{\beta}$ decay ${}_{49}^{132}{\mathrm{In}}_{83}$. The analysis allowed for placement a total 70 transitions and 29 excited states in $^{132}\mathrm{Sn}$. Detailed spectroscopy also on $^{131}\mathrm{Sb}$, resulting from $^{131}\mathrm{Sn}$, produced $\ensuremath{\beta}$-delayed neutron $^{132}\mathrm{In}$. Measurement $\ensuremath{\gamma}$ rays...
The low-lying structure of semimagic $^{118}\mathrm{Sn}$ has been investigated through the $\ensuremath{\beta}$ decay $^{118}\mathrm{In}$ (${T}_{1/2}=4.45$ min) to study shape coexistence via reduced transition probabilities states in 2p-2h proton intruder band. This high-statistics was carried out at TRIUMF-ISAC with GRIFFIN spectrometer. In total, 99 transitions have placed level scheme 43 being newly observed. Three $\ensuremath{\gamma}$-ray energies near 285 keV resolved from which...
A high-precision branching ratio measurement for the superallowed Fermi ${\ensuremath{\beta}}^{+}$ emitter $^{62}\mathrm{Ga}$ was performed with Gamma-Ray Infrastructure Fundamental Investigations of Nuclei (GRIFFIN) spectrometer at Isotope Separator and Accelerator (ISAC) radioactive ion beam facility TRIUMF. The high efficiency GRIFFIN allowed 63 $\ensuremath{\gamma}$-ray transitions, intensities down to $\ensuremath{\approx}1$ part per million (ppm)...
A high-precision half-life measurement for the superallowed Fermi $\beta^+$ emitter $^{22}$Mg was performed at TRIUMF-ISAC facility using a 4$\pi$ proportional gas counter. The result of $T_{1/2} = 3.87400 \pm 0.00079$ s is factor 3 more precise than previously adopted world average and resolves discrepancy between two published measurements.
The $\ensuremath{\beta}$ decay of neutron-rich $^{129}\mathrm{In}$ into $^{129}\mathrm{Sn}$ was studied using the GRIFFIN spectrometer at ISAC facility TRIUMF. study observed half-lives ground state and each $\ensuremath{\beta}$-decaying isomers. level scheme has been expanded with thirty-one new $\ensuremath{\gamma}$-ray transitions nine excited levels, leading to a reevaluation branching ratios spin assignments. observation ($29/{2}^{+}$) 1911-keV isomeric in is reported for first time,...
Over a 12 year period, the 8π γ-ray spectrometer at TRIUMF-ISAC facility was world unique device for β-decay studies. Equipped with variety of auxiliary devices, it used in studies Fermi superallowed β+ emitters, and nuclear structure far from stability those employing high-statistics measurements. In present contribution, this latter use is highlighted examples recent data obtained decay 122Cs to 122Xe. The replaced much more powerful GRIFFIN 2014, ensuring world-leading capability...
In recent years, a number of both theoretical and experimental investigations have been performed focusing on the zirconium isotopic chain. particular, state-of-the-art Monte Carlo shell-model calculations predict shape coexistence in these isotopes. this context, 94 Zr nucleus, which is believed to possess nearly spherical ground state, particularly interesting since purported deformed structure basedon low-lying 0 2 + making it amenable for detailed study. order provide definitive...
The Coulomb excitation of $^{102}\mathrm{Ru}$ was performed with beams $^{12}\mathrm{C}$ and $^{16}\mathrm{O}$ ions. beam particles scattered at forward angles were momentum analyzed a magnetic spectrograph. resolution achieved enabled the populations ${2}_{1}^{+}$ state, unresolved ${2}_{2}^{+}/{4}_{1}^{+}$, ${2}_{4}^{+}/{3}_{1}^{\ensuremath{-}}$, doublets states, ${3}_{2}^{\ensuremath{-}}$ state to be determined as function scattering angle. These are compared gosia calculations, yielding...
Excited states of $^{129}\mathrm{In}$ populated following the $\ensuremath{\beta}$ decay $^{129}\mathrm{Cd}$ were experimentally studied with GRIFFIN spectrometer at ISAC facility TRIUMF, Canada. A 480-MeV proton beam was impinged on a uranium carbide target and extracted using Ion Guide Laser Source (IG-LIS). $\ensuremath{\gamma}$ rays detected comprising plastic scintillator SCEPTAR 16 high-purity germanium (HPGe) clover-type detectors. From...