I. Ladarescu
A5082548740- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Astro and Planetary Science
- Nuclear Materials and Properties
- Particle physics theoretical and experimental studies
- Boron Compounds in Chemistry
- Advanced X-ray and CT Imaging
- Astronomical and nuclear sciences
- Graphite, nuclear technology, radiation studies
- Ocean Acidification Effects and Responses
- Superconducting Materials and Applications
- High-Energy Particle Collisions Research
- Marine Biology and Ecology Research
- Climate Change Communication and Perception
- Neutrino Physics Research
- Particle accelerators and beam dynamics
- Stochastic processes and statistical mechanics
- Isotope Analysis in Ecology
- X-ray Spectroscopy and Fluorescence Analysis
Instituto de Física Corpuscular
2018-2024
Universitat de València
2018-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2024
University of Łódź
2023
Australian National University
2020
Abstract This article presents a few selected developments and future ideas related to the measurement of $$(n,\gamma )$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo>,</mml:mo> <mml:mi>γ</mml:mi> <mml:mo>)</mml:mo> </mml:mrow> </mml:math> data astrophysical interest at CERN n_TOF. The MC-aided analysis methodology for use low-efficiency radiation detectors in time-of-flight neutron-capture measurements is discussed, with...
^{140}Ce(n,γ) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being bottleneck in the flow. For this reason, it was measured with high accuracy (uncertainty ≈5%) at n_TOF facility, an unprecedented combination of purity sample and low neutron-sensitivity detectors. The Maxwellian averaged cross section up 40% higher than previously accepted values. Stellar model calculations indicate reduction around 20% s-process contribution Galactic cerium abundance smaller...
Abstract Compton imaging represents a promising technique for range verification in proton therapy treatments. In this work, we report on the advantageous aspects of i-TED detector proton-range monitoring, based results first Monte Carlo study its applicability to field. is an array cameras, that have been specifically designed neutron-capture nuclear physics experiments, which are characterized by $$\gamma $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>γ</mml:mi>...
Abstract This work presents GN-Vision, a novel dual γ -ray and neutron imaging system, which aims at simultaneously obtaining information about the spatial origin of sources. The proposed device is based on two position sensitive detection planes exploits Compton technique for -rays. In addition, distributions slow- thermal-neutron sources (<100 eV) are reconstructed by using passive pin-hole collimator attached to first plane. gamma-neutron could be prime interest nuclear safety security...
Dosimetry in BNCT poses significant challenges due to the indirect effect of neutrons interacting with elements within body and uncertainties associated uptake boron compounds used clinical practice. Current treatment planning relies on unconventional estimates tumor derived from prior PET scans thus, an online boron-uptake monitor would be highly convenient. This work presents first pilot experiments carried out at ILL-Grenoble high-efficiency Compton camera i-TED, hereby aiming...
GN-Vision is a compact, dual-modality imaging device designed to simultaneously localize the spatial origin of $\gamma$-ray and slow neutron sources, with potential applications in nuclear safety, security, hadron therapy. The system utilizes two position-sensitive detection planes, combining Compton techniques for visualization passive collimation thermal neutrons (energies below 100 eV). This paper presents first experimental outcomes from initial prototype, focused on development its...
The neutron time-of-flight facility n_TOF at CERN is a spallation source dedicated to measurements of neutron-induced reaction cross-sections interest in nuclear technologies, astrophysics, and other applications. Since 2014, Experimental ARea 2 (EAR2) operational delivers fluence ∼4⋅107 neutrons per nominal proton pulse, which ∼50 times higher than the one 1 (EAR1) ∼8⋅105 pulse. high flux EAR2 results counting rates detectors that challenged previously existing capture detection systems....
One of the critical aspects for accurate determination neutron capture cross sections when combining time-of-flight and total energy detector techniques is characterization control systematic uncertainties associated to measuring devices. In this work we explore most conspicuous effects harsh count rate conditions: dead-time pile-up effects. Both effects, not properly treated, can lead large bias in sections. majority measurements carried out at CERN n_TOF facility, detectors choice are C6D6...
Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as slow neutron (s-) process nucleosynthesis operating red-giant and massive stars. However, via time-of-flight (TOF) technique on key $s$-process nuclei often challenging. Difficulties arise from limited mass ($\sim$mg) available high sample-related background case unstable branching points. Measurements magic nuclei, that act bottlenecks, affected by low (n,$\gamma$) cross sections a...
The NEAR Station is a new experimental area developed at the n_TOF Facility CERN. activation station of underwent characterization beam following installation Spallation Target. commissioning neutron comprises set simulations made with FLUKA code and verification. determination spectrum was using techniques three separate set-ups. Two set-ups were based on Multi-foil Activation technique (MAM-1 MAM-2), third set-up relied process moderation single material (ANTILoPE). are presented. Also...
GN-Vision is a novel dual γ-ray and neutron imaging system, which aims at imaging, simultaneously to the prompt gammas, spatial origin of slow thermal dose (<100 eV) generated during hadron therapy treatments. The proposed device can also be interest for industrial applications as well in nuclear security. system has been designed following technical developments iTED detector, an array high efficiency Compton cameras intended neutron-capture experiments, energies span up 5-6 MeV, similar...
Abstract During the second long shutdown period of CERN accelerator complex (LS2, 2019-2021), several upgrade activities took place at n_TOF facility. The most important have been replacement spallation target with a next generation nitrogen-cooled lead target. Additionally, new experimental area, very short distance from assembly (the NEAR Station) was established. In this paper, core commissioning actions installations are described. improvement in infrastructure accompanied by detector...
Capture and total cross section measurements for 94,95,96 Mo have been performed at the neutron time-of-flight facilities, n_TOF CERN GELINA JRC-Geel. The were using isotopically enriched samples with an enrichment above 95% each of isotopes. capture C 6 D detectors a new sTED detector. transmission 10 m station Li glass Preliminary results these are presented.
This paper explores the adaptation and application of i-TED Compton imagers for real-time dosimetry in Boron Neutron Capture Therapy (BNCT). The array, previously utilized nuclear astrophysics experiments at CERN, is being optimized detecting imaging 478 keV gamma-rays, critical accurate BNCT dosimetry. Detailed Monte Carlo simulations were used to optimize detector configuration enhance its performance challenging radiation environment typical BNCT. Additionally, advanced 3D image...
Compton cameras are radiation detectors that provide spatial information on the origin of {\gamma}-ray sources based scattering effect. Many applications require these to be used at high counting rate. As such, preprocessing detections as well imaging algorithms required time-efficient in order for data processed real time. In this work, optimizations events monolithic crystals, with special focus event identification, were implemented using a parallelizable algorithm. Regarding imaging, an...
We investigate the performance of large area radiation detectors, with high energy- and spatial-resolution, intended for development a Total Energy Detector gamma-ray imaging capability, so-called i-TED. This new aims an enhancement in detection sensitivity time-of-flight neutron capture measurements, versus commonly used C6D6 liquid scintillation total-energy detectors. In this work, we study detail impact readout photosensor on energy response (5050 mm2) monolithic LaCl3(Ce) crystals,...
One of the crucial ingredients for improvement stellar models is accurate knowledge neutron capture cross-sections different isotopes involved in s -, r - and i processes. These measurements can shed light on existing discrepancies between observed predicted isotopic abundances help to constrain physical conditions where these reactions take place along stages evolution. In particular case radioactive 94 Nb, Nb( n , γ ) cross-section could play a role determination -process production Mo AGB...
The neutron time-of-flight facility n_TOF is characterised by its high instantaneous intensity, high-resolution and broad energy spectra, specially conceived for neutron-induced reaction cross section measurements. Two Time-Of-Flight (TOF) experimental areas are available at the facility: area 1 (EAR1), located end of 185 m horizontal flight path from spallation target, 2 (EAR2), placed 20 target in vertical direction. fluence EAR2 ˜ 300 times more intense than EAR1 relevant window. was...