A5056569657- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Advanced NMR Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Quantum, superfluid, helium dynamics
- Neutrino Physics Research
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Cold Atom Physics and Bose-Einstein Condensates
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Graphite, nuclear technology, radiation studies
- Radiopharmaceutical Chemistry and Applications
- Mass Spectrometry Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Nuclear reactor physics and engineering
- Radiation Therapy and Dosimetry
- Particle physics theoretical and experimental studies
- X-ray Spectroscopy and Fluorescence Analysis
- Superconducting Materials and Applications
- Magnetic properties of thin films
TRIUMF
2020-2024
University of Milan
2017-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2019-2024
Lawrence Berkeley National Laboratory
2022-2024
University of Warsaw
2024
National Centre for Nuclear Research
2024
GSI Helmholtz Centre for Heavy Ion Research
2022
Istituto Nazionale di Fisica Nucleare
2021
Institut Laue-Langevin
2019-2020
Excited-state spectroscopy from the first Facility for Rare Isotope Beams (FRIB) experiment is reported. A 24(2)-$\mu$s isomer was observed with FRIB Decay Station initiator (FDSi) through a cascade of 224- and 401-keV $\gamma$ rays in coincidence $^{32}\textrm{Na}$ nuclei. This only known microsecond ($1{\text{ }\mu\text{s}}\leq T_{1/2} < 1\text{ ms}$) region. nucleus at heart $N=20$ island shape inversion crossroads spherical shell-model, deformed ab initio theories. It can be represented...
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...
The low-spin structure of the semimagic ^{64}Ni nucleus has been considerably expanded: combining four experiments, several 0^{+} and 2^{+} excited states were identified below 4.5 MeV, their properties established. Monte Carlo shell model accounts for results unveils an unexpectedly complex landscape coexisting shapes: a prolate excitation is located at surprisingly high energy (3463 keV), with collective state 286 keV above it, first such observation in Ni isotopes. evolution minimum...
New half-lives for exotic isotopes approaching the neutron drip-line in vicinity of N∼28 Z=12-15 were measured at Facility Rare Isotope Beams (FRIB) with FRIB decay station initiator. The first experimental results are compared to latest quasiparticle random phase approximation and shell-model calculations. Overall, consistent available theoretical descriptions suggest a well-developed region deformation below ^{48}Ca N=28 isotones. erosion Z=14 subshell closure Si is experimentally...
The cross-shell excited states of $^{34}\mathrm{Si}$ have been investigated via $\ensuremath{\beta}$ decays the ${4}^{\ensuremath{-}}$ ground state and ${1}^{+}$ isomeric $^{34}\mathrm{Al}$. Since valence protons neutrons occupy different major shells in as well intruder $^{34}\mathrm{Al}$, levels are populated allowed decays. Spin assignments to such were established through $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}$ angular correlation analysis for negative-parity with...
The level scheme of 96Y was significantly extended and a new 201 ns isomer located at 1655 keV excitation energy, with spin-parity assignment 5± or 6−. decays to spherical low-spin structure by transitions large hindrance is fed short cascade which resembles the beginning rotational band. This in analogy feeding decay pattern 4− 98Y, here confirmed, lifetime analysis, as bandhead sizable deformation. It suggested that arises from shape change between deformed configurations, indicates...
We report on spectroscopic information and lifetime measurements of even-even neutron-rich Te isotopes. Excited states were populated in fast-neutron induced fission $^{238}\mathrm{U}$ at the ALTO facility IJCLab with LICORNE neutron source detected using hybrid $\ensuremath{\nu}$-ball spectrometer. provide first results lifetimes ${6}_{1}^{+}$ state $^{136}\mathrm{Te}$ (${6}_{1}^{+}$), (${4}_{1}^{+}$), (${2}_{1}^{+}$) $^{138}\mathrm{Te}$ discuss context large-scale shell-model calculations....
The half-life of the ${4}_{2}^{+}$ state $2\mathrm{p}\ensuremath{-}2\mathrm{h}$ proton intruder band $^{116}\mathrm{Sn}$ has been measured with fast-timing technique. lifetime ${T}_{1/2}=29(10)$ ps leads to a transition probability $B\left(E2;{4}_{2}^{+}\ensuremath{\rightarrow}{2}_{2}^{+}\right)=40(13)$ Weisskopf units, which is in very good agreement large $B\left(E2;{2}_{2}^{+}\ensuremath{\rightarrow}{0}_{3}^{+}\right)$ value previously and provides strong support for ${0}_{3}^{+}$ as...
The γ decay of the elusive narrow, near-threshold proton resonance in 11B was investigated at Laboratori Nazionali di Legnaro (INFN) a particle-γ coincidence experiment, using 6Li(6Li,pγ) fusion-evaporation reaction and GALILEO-GALTRACE setup. No clear signature found for possible E1 to 1/21−, first-excited state 11B, predicted by Shell Model Embedded Continuum (SMEC) with branching 0.98−69+167×10−3 respect dominant particle-decaying modes. statistical analysis γ-ray spectrum provided an...
The population of isomeric states in the prompt decay fission fragments---so-called yield ratios (IYRs)---is known to be sensitive angular momentum $J$ that fragment emerged with, and may therefore contain valuable information on mechanism behind process. In this work, we investigate how changes fissioning system impact measured IYRs fragments learn more about what parameters affect generation. To enable this, a new technique for measuring is first demonstrated. It based time arrival...
The level structure of $^{36}\mathrm{Al}$ has been studied via $\ensuremath{\beta}$ decay $^{36}\mathrm{Mg}$ at the Facility for Rare Isotope Beams (FRIB) and National Superconducting Cyclotron Laboratory (NSCL). A long-lived isomer in was identified which decays by to an excited state $^{36}\mathrm{Si}$. ground isomeric were found populate different energy levels results from two data sets present work complement each other. Configuration interaction calculations performed with FSU...
Medium and high spin states of the $^{96}\mathrm{Y}$ nucleus, located in shape-coexistence region near $Z=40$ $N=60$, were populated thermal-neutron-induced fission $^{233}\mathrm{U}$ $^{235}\mathrm{U}$ targets, diluted a scintillator. $\ensuremath{\gamma}$ rays measured with FIssion Product Prompt $\ensuremath{\gamma}$-ray Spectrometer (FIPPS) high-purity germanium (HPGe) detector array, using double triple coincidence techniques taking advantage efficient tag provided by scintillating...
Prompt and delayed $\ensuremath{\gamma}$-ray spectroscopy of the neutron-rich $^{94}\mathrm{Kr}$ was performed, as part fission campaign at ALTO facility IPN Orsay, using fast-neutron-induced reaction $^{238}\mathrm{U}(n,f)$ in combination with $\ensuremath{\nu}$-Ball array, a novel hybrid $\ensuremath{\gamma}$ spectrometer for energy lifetime measurements. Several new yrast nonyrast transitions were observed first time, extending previously known level scheme. Additionally, we report on...
An experimental study of the isospin mixing in mass region $A=60$ was made by measuring $\ensuremath{\gamma}$ decay from giant dipole resonance compound nuclei $^{60}\mathrm{Zn}$ and $^{62}\mathrm{Zn}$. These were populated at two different excitation energies, ${E}^{*}=47$ MeV ${E}^{*}=58$ using fusion evaporation reactions $^{32}\mathrm{S}+^{28}\mathrm{Si}$ bombarding energy 86 110 $^{32}\mathrm{S}+^{30}\mathrm{Si}$ 75 98 MeV. In experiment, performed Laboratori Nazionali di Legnaro...
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)...
Background: $\ensuremath{\gamma}$-ray spectroscopy studies of the Sn isotopes provide important information on nuclear structure and shell evolution across long isotopic chain between doubly-magic $^{100}\mathrm{Sn}$ $^{132}\mathrm{Sn}$ nuclei. These also offer great value to test tune models which can then be applied other regions chart.Purpose: We aim expand level scheme $^{118}\mathrm{Sn}$ by populating low-spin states in range 3--5 MeV determine their angular momentum for possible...
We present recent results on the structure of one-valence-particle Ca41 and Ca49 nuclei one-valence-hole Ca47 nucleus. The isotopes interest were populated via cold-neutron-capture reactions Ca40(n,γ), Ca48(n,γ), Ca46(n,γ), respectively. experiments performed at Institut Laue-Langevin, within EXILL campaign, which employed a large array high-purity germanium (HPGe) detectors. γ decay level schemes these investigated by γ-ray coincidence relationships, leading to identification 41, 10, 6 new...
We report on spectroscopic information and lifetime measurements in the neutron-rich $^{135,137,139}\mathrm{I}$ isotopes. This is first data iodine isotopes beyond $N=82$. Excited states were populated fast neutron-induced fission of $^{238}\mathrm{U}$ at ALTO facility IJCLab with LICORNE neutron source detected using hybrid $\ensuremath{\nu}$-ball spectrometer. The level schemes are revised terms excited up to maximum spin-parity $(33/{2}^{+})$, for time fission. provide results lifetimes...
Lifetime measurements of the (3−), (4−), and (6−) intraband states in neutron-rich, odd-odd Rb96 nucleus were performed at LOHENGRIN spectrometer Institut Laue-Langevin, using thermal-neutron-induced fission U235 fast-timing techniques with LaBr3:Ce scintillator detectors. The nanosecond isomeric nature (3−) bandhead was established as well β2=0.39(3) deformation parameter band, pointing to a robust Rb96. Moreover, hindered B(E2) value 3.9−13+19×10−2 W.u. found for γ decay deformed (4−)...