Angie Orduz
A5068510560- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Particle Accelerators and Free-Electron Lasers
- Atomic and Molecular Physics
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Astronomical and nuclear sciences
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Radio Frequency Integrated Circuit Design
- Energy Harvesting in Wireless Networks
- Radiation Therapy and Dosimetry
- Boron Compounds in Chemistry
- Advanced NMR Techniques and Applications
- Underwater Vehicles and Communication Systems
- Photocathodes and Microchannel Plates
- X-ray Spectroscopy and Fluorescence Analysis
- Antenna Design and Analysis
- Plasma Diagnostics and Applications
- Advances in Oncology and Radiotherapy
- Muon and positron interactions and applications
GANIL
2019-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2022-2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2024
CEA Paris-Saclay
2024
Institut National de Physique Nucléaire et de Physique des Particules
2022
Centre National de la Recherche Scientifique
2022
Universidad de Huelva
2014-2019
Institut des Sciences des Plantes de Paris Saclay
2016
Hospital Juan Ramón Jiménez
2016
Argonne National Laboratory
2016
Previously unknown isotopes 30Ar and 29Cl have been identified by measurement of the trajectories their in-flight decay products 28S+p+p 28S+p, respectively. The analysis angular correlations fragments provided information on energies structure parent states. ground states were found at 2.25+0.15−0.10 1.8±0.1 MeV above two- one-proton thresholds, lowest in point to a violation isobaric symmetry these unbound nuclei. two-proton has transition region between simultaneous sequential proton...
The β decay of 31Ar, produced by fragmentation an 36Ar beam at 880 MeV/nucleon, was investigated. Identified ions 31Ar were stopped in a gaseous time projection chamber with optical readout allowing us to record events emission protons. In addition β-delayed one and two protons we clearly observed the three-proton branch. branching ratio for this channel is found be 0.07±0.02%.Received 21 May 2015DOI:https://doi.org/10.1103/PhysRevC.91.064309©2015 American Physical Society
The occurrence of octupolar shapes in the Ba isotopic chain was recently established experimentally up to $N=90$. To further extend systematics, evolution most neutron-rich members $Z=56$ accessible at present, $^{148,150}\mathrm{Ba}$, has been studied via $\ensuremath{\beta}$ decay ISOLDE Decay Station. This paper reports on first measurement positive- and negative-parity low-spin excited states $^{150}\mathrm{Ba}$ presents an extension $\ensuremath{\beta}$-decay scheme $^{148}\mathrm{Cs}$....
The presence of a neutron halo in 15C has been demonstrated several reaction experiments at intermediate energies. In the present study, dynamical effects this structure are observed for first time Coulomb barrier energies + 208Pb quasi-elastic scattering Elab=65 MeV, measured HIE-ISOLDE facility, CERN using high-granularity detector array GLORIA. A combined continuum discretised coupled channels and calculation describes data well significant coupling due both to breakup single-neutron...
The proton-unbound argon and chlorine isotopes have been studied by measuring trajectories of their decay-in-flight products using a tracking technique with microstrip detectors. proton (1p) two-proton (2p) emission processes detected in the measured angular correlations “heavy-fragment”+p “heavy-fragment”+p+p, respectively. ground states previously unknown Cl30 Cl28 observed for first time, providing 1p-separation energies Sp −0.48(2) −1.60(8), MeV, relevant systematics 1p- 2p-separation...
Neutron-rich Ba isotopes are expected to exhibit octupolar correlations, reaching their maximum in around mass A = 146. The odd-A neutron-rich members of this isotopic chain show typical patterns related non-axially symmetric shapes, which however less marked compared even-A ones, pointing a major contribution from vibrations. In the present paper we results recent study focused on 148–150Cs β-decay performed at ISOLDE Decay Station equipped with fast-timing detectors. detailed analysis...
The most-remote from stability isotope $^{31}$K, which is located four atomic mass units beyond the proton drip line, has been observed. It unbound in respect to three-proton (${3p}$) emission, and its decays have detected flight by measuring trajectories of all decay products using micro-strip detectors. $3p$-emission processes studied means angular correlations $^{28}$S+3$p$ respective vertexes. energies previously-unknown ground excited states $^{31}$K determined. This provides $3p$...
SPIRAL2 is a high power linear accelerator part of the GANIL laboratory. This superconducting (SC) linac can accelerate cw light ions to heavy at energies up 40 MeV/nucleon and 14.5 MeV/nucleon, respectively. In July 2019, authorization fully operate SC permitted start commissioning medium energy beam transport line linac. The main milestone in 2020 was validate design by increasing duty cycle 10% with proton beam. paper presents strategy used team increase power, as well results obtained...
Several states of proton-unbound isotopes $^{30}\mathrm{Ar}$ and $^{29}\mathrm{Cl}$ were investigated by measuring their in-flight decay products, $^{28}\mathrm{S}$ + proton proton, respectively. A refined analysis $^{28}\mathrm{S}$-proton angular correlations indicates that the ground state is located at $2.{45}_{\ensuremath{-}0.10}^{+0.05}$ MeV above two-proton emission threshold. The investigation mechanism demonstrates it has transition dynamics. In ``transitional'' region, correlation...
The proton drip-line nucleus 17Ne is considered a good candidate for Borromean two-proton halo with 15O + p structure. Angular distributions of the elastic scattering and inclusive production 136 MeV beam incident on 208Pb target were measured first time at SPIRAL1 facility, GANIL. Use GLORIA detector array allowed high-resolution data over wide angular range from 20∘ up to 95∘ in laboratory frame be obtained. distribution shows similarities those both 6He 20Ne equivalent collision energies...
Abstract The medium energy beam transport of the SPIRAL2 superconducting linac contains a single bunch selection system equipped with 7.5 kW dump. This device, originally designed long flat slope to decrease power density so that maximum operating temperature was 170 °C, impacted by Coulomb scattering generating two side effects: heating downstream components and degrading current measurement uncertainty. paper relates way these problems were solved.
The single bunch selector of the SPIRAL2 accelerator allows reducing rate to target Neutron For Science (NFS) facility in view time flight experiments. It involves two processes: a static dipole magnet deviates beam on 7.3 kW scraper, while electric field high voltage travelling wave pulses maintains selected axis at required repetition rate. This original principle, named "inverted duty cycle", was chosen provide reasonable power requirement for pulse generators, rejection side bunches, and...
Prospects of experimental studies argon and chlorine isotopes located far beyond the proton dripline are studied by using systematics cluster models. The deviations from widespread observed in $^{28,29}\mathrm{Cl}$ $^{29,30}\mathrm{Ar}$ have been theoretically substantiated, analogous predicted for lighter isotopes. limits nuclear structure existence Ar Cl isotopic chains, with $^{26}\mathrm{Ar}$ $^{25}\mathrm{Cl}$ found to be lightest sufficiently long-living systems. By simultaneous...
Low-energy acceleration for the LINCE project [1] will be achieved using a 72.75 MHz normal conducting four vanes RFQ designed to give 460 keV/u boost A/Q = 7 ions in about 5m . The are modeled accommodate windows clear separation of modes and easy fitting an octagonal resonance chamber. This article presents main numerical results radio-frequency modeling computational fluid dynamics (CFD). Particle tracking studies optimized bunching shown as well.
The ECOS is considering the construction of a new facility for accelerating high intensity stable beams with energies at and above Coulomb barrier, LINCE light heavy ion accelerator.This could be based on normal conducting CW-RFQ superconducting linac, working 72.75 MHz.This paper presents design study RFQ system which able to achieve 500 keV/u output A/Q = 7 ions in only 5 m length.
Abstract The SPIRAL2 linac is now successfully commissioned; H + , 4 He 2+ D and 18 O 6+ have been accelerated up to nominal parameters 7+ 40 Ar 14+ beams also 7 MeV/A. main steps with 5 mA 0.6 are described. general results of the commissioning RF, cryogenic diagnostics systems, as well preliminary first experiments on NFS presented. In addition an improvement matching linac, tuning procedures 3 Medium Energy Beam Transport (MEBT) rebunchers 26 SC cavities were progressively improved reach...
We report on the observation of previously-unknown isotope $^{21}$Al, first unbound aluminum located beyond proton dripline. The $^{21}$Al nucleus decays by one-proton (1p) emission, and its in-flight were detected tracking trajectories all decay products with micro-strip silicon detectors. 1p-emission processes studied analyses measured angular correlations $^{20}$Mg+p. 1p-decay energies ground low-lying excited states mass excess separation energy value $S_p$=$-1.1(1)$ MeV determined.
Abstract The neutron rich carbon isotope 15 C is the only known case of an almost “pure” 2 s1/2 single-neutron halo ground state configuration. At collision energies around Coulomb barrier reaction dynamics expected to be dominated by single transfer and breakup. To investigate these effects, we have measured scattering with a 208 Pb target at 65 MeV HIE-ISOLDE facility in CERN (Geneva, Switzerland). preliminary data demonstrates presence strong long-range absorption pattern angular...
During the past years, ECOS working group strongly supported construction of a dedicated high-intensity stable-ion-beam facility in Europe, with energies at and above Coulomb barrier as part Long-Range Plan Nuclear-Physics community. LINCE will be multi-user to science: fundamental physics, astrophysics, nuclear structure reaction dynamics. Applied research is foreseen fields medical aerospace material sciences energetic heavy ions. The produce wide range ions, from protons (45 MeV) up...