M. Jentschel
A5060314215- Nuclear Physics and Applications
- Nuclear physics research studies
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Astronomical and nuclear sciences
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Radioactive Decay and Measurement Techniques
- Quantum Chromodynamics and Particle Interactions
- Crystallography and Radiation Phenomena
- Advanced X-ray Imaging Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Particle Detector Development and Performance
- Rare-earth and actinide compounds
- Medical Imaging Techniques and Applications
- Advanced Chemical Physics Studies
- Scientific Measurement and Uncertainty Evaluation
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Astrophysical Phenomena and Observations
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- X-ray Diffraction in Crystallography
Institut Laue-Langevin
2016-2025
Institut Langevin
1996-2020
CEA Grenoble
2014-2019
Laboratoire de Physique Subatomique et de Cosmologie
2009-2018
University of Warsaw
2009-2018
Consejo Superior de Investigaciones Científicas
2016
Université Libre de Bruxelles
2015
Institut Pluridisciplinaire Hubert Curien
2009-2014
University of Ferrara
2013-2014
Institute for Nuclear Research
2012
The low-spin structure of the 206Tl nucleus was studied in thermal neutron capture reaction 205Tl(𝑛,𝛾)206Tl at Institut Laue-Langevin Grenoble making use multidetector HPGe array Fission Product Prompt 𝛾-ray Spectrometer and 𝛾𝛾-coincidence techniques. information on discrete structures located below binding energy extended: a total number 99 𝛾 rays (75 new) were observed 21 excited states (8 located. analysis angular correlations used to extract transitions multipolarities, which helped...
The STEREO experiment is a very short baseline reactor antineutrino aiming at testing the hypothesis of light sterile neutrinos as an explanation deficit observed neutrino interaction rate with respect to predicted rate, known Reactor Antineutrino Anomaly. detector center located 10 m away from compact, highly 235U enriched core research nuclear Institut Laue Langevin in Grenoble, France. This paper describes site, components and associated shielding designed suppress external sources...
In the EXILL campaign a highly efficient array of high purity germanium (HPGe) detectors was operated at cold neutron beam facility PF1B Institut Laue-Langevin (ILL) to carry out nuclear structure studies, via measurements γ-rays following neutron-induced capture and fission reactions. The setup consisted collimation system producing pencil with thermal equivalent flux about 108 n s−1cm−2 target position negligible halo. surrounded by an eight ten anti-Compton shielded EXOGAM Clover...
Rapid shape changes are observed for neutron-rich nuclei with A around 100. In particular, a sudden onset of ground-state deformation is in the Zr and Sr isotopic chains at N = 60: Low-lying states N≤58 nearly spherical, while those N≥60 have rotational character. Nuclear lifetimes as short few picoseconds can be measured using fast-timing techniques LaBr3(Ce) scintillators, yielding key ingredient systematic study evolution this region. We used neutron-induced fission 241Pu 235U to excited...
The level scheme of the neutron-rich \(^{87}\)Se isotope has been extended up to 2397 keV excitation energy. interest was produced in a neutron-induced fission reaction \(^{235}\)U target at Institut Laue-Langevin Grenoble. During analysis, six new gamma transitions were identified by employing multifold gamma-ray coincidence relationships, measured with FIPPS array. Based on angular correlations technique, tentative spin-parity assignments have proposed for low-lying levels. Abstract...
Four neutron capture experiments were carried out at the Institut Laue–Langevin (ILL), Grenoble, with FIPPS \(\gamma \)-ray spectrometer, aim of performing a complete low-spin spectroscopy study \(^{42,43,44,45}\)Ca isotopes. The goal project is to investigate structure Ca isotopes in \(A\sim 40\)–48 mass region, focusing particular on shape coexistence phenomena. Preliminary results \(^{42}\)Ca are discussed here, for which more than 10 new levels and 100 transitions found. Angular...
For x rays the real part of refractive index, dominated by Rayleigh scattering, is negative and converges to zero for higher energies. $\ensuremath{\gamma}$ a positive component, related Delbr\"uck increases with energy becomes dominating. The deflection monochromatic beam due refraction was measured placing Si wedge into flat double crystal spectrometer. Data were obtained in an range from 0.18 MeV 2 MeV. data are compared theory, taking account elastic inelastic scattering as well recent...
An array of eight Ge detectors for coincidence measurements γ rays from neutron-capture reactions has been constructed at the PF1B cold-neutron facility Institut Laue-Langevin. The arranged in one plane every 45° can be used angular correlation measurements. neutron collimation line setup provides a beam 12 mm diameter and capture flux about 108/(s × cm2) target position, with negligible halo. With up to 109 γγ 108 triple-γ events have collected day measurement. Precise energy efficiency...
Lifetimes of low-lying yrast states in neutron-rich $^{94,96,98}\mathrm{Sr}$ have been measured by Germanium-gated $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ fast timing with $\mathrm{LaBr}3(\mathrm{Ce})$ detectors using the EXILL spectrometer at Institut Laue-Langevin. Sr fission products were generated cold-neutron-induced $^{235}\mathrm{U}$ and stopped almost instantaneously within thick target. The experimental $B(E2)$ values are compared results Monte Carlo shell-model...
The γ-ray decay of excited states the one-valence-proton nucleus 133Sb has been studied using cold-neutron induced fission 235U and 241Pu targets, during EXILL campaign at ILL reactor in Grenoble. By a highly efficient HPGe array, coincidences between γ-rays prompt with event those delayed up to several tens microseconds were investigated, allowing observe, for first time, high-spin above 16.6 μs isomer. Lifetimes analysis, performed by fast-timing techniques LaBr3(Ce) scintillators,...
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...
Crystals are the elementary constituents of Laue lenses, an emerging technology which could allow realization a space-borne telescope 10–100 times more sensitive than existing ones, in 100 keV–1.5 MeV energy range. This paper addresses development efficient crystals for lens. In theoretical part, 35 candidate crystals, both pure and two-component considered. Their peak reflectivity at 100, 500 keV 1 is calculated assuming they mosaic crystals. It found that, by careful selection it possible...
Tetrahedral symmetry in strongly interacting systems would establish a new class of quantum effects at subatomic scale. Excited states 156Gd that could carry the information about tetrahedral were populated 155Gd(n,γ)156Gd reaction and studied using GAMS4/5 Bragg spectrometers Institut Laue-Langevin. We have identified 5(1)- → 3(1)- transition 131.983(12) keV determined its intensity to be 1.9(3)x10(-6) per neutron capture. The lifetime τ=220(-30)(+180) fs state has been measured GRID...
Medium spin excited levels in $^{88}\mathrm{Br}$ populated fission of $^{235}\mathrm{U}$ induced by neutrons have been observed for the first time. The measurement $\ensuremath{\gamma}$ radiation following has performed using EXILL array Ge detectors at cold-neutron beam facility PF1B Institut Laue-Langevin (ILL), Grenoble. ground state is proposed to be ${1}^{\ensuremath{-}}$, changing adopted $({2}^{\ensuremath{-}})$ value. low-energy, newly are members...
FIPPS is the new nuclear physics instrument of ILL for spectroscopy nuclei produced in neutron-induced reactions. The performance first implementation setup will be shown, together with an overview experimental campaign (December 2016-March 2017). Future perspectives and opportunities then discussed.
A quasi mosaic bent crystal for high-resolution diffraction of X and γ rays has been realized. net curvature was imprinted to the thanks a series superficial grooves keep without external devices. The highlights very high efficiency due curvature. Quasi crystals this kind are proposed realization focusing Laue lens hard X-rays.
Two measurements of $\ensuremath{\gamma}$ rays from the slow-neutron capture reaction on a $^{101}\mathrm{Ru}$ target were performed at PF1B cold-neutron facility and DuMond GAMma Spectrometer GAMS5 ILL Grenoble, to study in detail excitations transitional nucleus $^{102}\mathrm{Ru}$. A band structure top ${0}_{2}^{+}$ level has been identified its nature is discussed. Mixing between ${0}_{1}^{+}$ levels Ru isotopes with $50<N<66$ neutrons role development deformation ground state nuclei...
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...
A smooth onset of collectivity in 88,92,94,96Kr has been determined from reported B(E2;2+1→0+1) and E(2+1) values. This is contrast to the sudden even-even Zr, Mo, Sr isotopes. Our objective was complete systematics by determining value 90Kr, which produced cold-neutron-induced fission 235U. The lifetime 2+1 state 90Kr measured via electronic γ−γ timing technique using EXILL FATIMA spectrometers. Based on mean τ = 15(10) ps, 13+26−5 W.u. for first time deformation Kr isotopes beyond neutron...