A5103148161- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Advanced Radiotherapy Techniques
- Advanced NMR Techniques and Applications
- Luminescence Properties of Advanced Materials
- Advanced biosensing and bioanalysis techniques
- DNA and Nucleic Acid Chemistry
- Atomic and Molecular Physics
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Nanopore and Nanochannel Transport Studies
- Particle physics theoretical and experimental studies
- Quantum optics and atomic interactions
- Lanthanide and Transition Metal Complexes
- Nuclear physics research studies
- Photorefractive and Nonlinear Optics
- Nuclear reactor physics and engineering
- Nanoplatforms for cancer theranostics
- Electron and X-Ray Spectroscopy Techniques
- Advanced X-ray and CT Imaging
- Mass Spectrometry Techniques and Applications
- Radiation Effects and Dosimetry
Xinxiang Medical University
2020-2025
Centre National de la Recherche Scientifique
2002-2022
École Nationale Supérieure d'Ingénieurs de Caen
2006-2022
Université de Caen Normandie
2022
Normandie Université
2022
Laboratoire de Physique Corpusculaire
2004-2019
Laboratoire de Physique Corpusculaire de Caen
2002-2015
Institut National de Physique Nucléaire et de Physique des Particules
2002-2015
Liaocheng University
2008-2010
Sorbonne Université
1993
Radiation therapy accelerators require highly accurate dose deposition and the output must be monitored frequently regularly. Ionization chambers are primary tool for this control, but their size fragility make them unsuitable use during patient treatment. In collaboration with a French center cancer treatment in Caen, we describe development testing of low-cost radiotherapy dosimeter (SDM) based on scintillating fibers signal processing to reduce effect Cerenkov radiation background. The...
Radiation therapy accelerators require highly accurate dose deposition and the output must be monitored frequently regularly. Ionization chambers are primary tool for this control, but their size, high voltage needed, correction needed electrons make them unsuitable use during patient treatment. We have developed a small (1-mm-diam 1-mm-long active part), flexible, water-equivalent dosimeter. It is suitable photon electron beams without corrections, performs on line measurements. This...
In two possible symmetry sites exist for the Eu+3 ions, namely S6 and C2. The emission spectrum is primarily due to ions but additional lines are reported corresponding emissions. were identified by their long lifetime relative C2 represent Stark splitting of transition. This a pure magnetic dipole transition in consequently has low oscillator strength. absorption also been identified. Similar results have found temperature form , which isostructural with .
The Technical Design for the COMET Phase-I experiment is presented in this paper. an at J-PARC, Japan, which will search neutrinoless conversion of muons into electrons field aluminium nucleus ($\mu-e$ conversion, $\mu^- N \to e^- N$); a lepton flavor violating process. experimental sensitivity goal process $3.1\times10^{-15}$, or 90 % upper limit branching ratio $7\times 10^{-15}$, factor 100 improvement over existing limit. expected number background events 0.032. To achieve target and...
In the presence of a light singlet-like scalar state, Bino-dominated dark matter (DM) candidate in $\mathbb{Z}_3$-NMSSM exhibits significant differences from its counterpart MSSM, both terms intrinsic properties and mechanisms governing DM relic density detection. Motivated by recent advancements particle physics experiments, we systematically analyzed implications these developments for framework featuring bino-dominated scalar, ensuring theoretical consistency with empirical observations....
The concentration dependence curves of several , and activated phosphors for different excitations have been studied. optimum activator was found to be a function the number excited ions as well exciting wavelength. For radiation having high absorption coefficient, given phosphor shifted low concentration. under cathode‐ray excitation are almost identical obtained with host photoexcitation.
The explanation presented by Taichenachev et al. [Phys. Rev. A $61,$ 011802 (2000)] according to which the electromagnetically induced absorption (EIA) resonances observed in degenerate two-level systems are due coherence transfer from excited ground state is experimentally tested a Hanle-type experiment observing parametric resonance on $D1$ line of ${}^{87}\mathrm{Rb}.$ While EIA occurs $F=\stackrel{\ensuremath{\rightarrow}}{1}{F}^{\ensuremath{'}}=2$ transition cell containing only Rb...
The β decay of the neutron-rich nuclei K51−53 has been used to populate bound and unbound states in Ca50−53. Measurements γ rays as well β-delayed neutrons enabled detailed schemes be established levels identified 50−53Ca. A delayed one-neutron emission probability P1n 63±8% was determined for K51. total seven new transitions were observed following K51, 25 neutron branches found that enrich level scheme Ca51. Delayed probabilities P1n=74.4±9.3% P2n=2.3±0.3% K52, 12 Ca50,51,52. Three Ca52,53...
New radiation therapy techniques such as IMRT present significant efficiency due to their highly conformal dose distributions. A consequence of the complexity distributions (high gradients, small irradiation fields, low distribution, ...) is requirement for better precision quality assurance than in classical radiotherapy order compare conformation delivered with planned distribution and guarantee treatment. Currently this control mostly performed by matrices ionization chambers, diode...
The interaction of ${\mathrm{Ar}}^{17+}$ ions on metallic surfaces has been studied at various incidence angles by looking the x rays emitted in flight with a crystal spectrometer. A model developed to describe behavior outside surface, and Dirac-Fock calculations Auger rates for states many electrons high-n have performed. formation hollow atoms states, observed grazing incidence, contrast formed below surface lower-n (n=3--4). decay ground state these very excited represents less than 1%...
This paper is an investigation of whether trivalent europium occupies the two inequivalent yttrium sites (C2 and S6) in (C‐form) randomly or preferentially. The distribution found to be approximately random for concentrations greater than 1 atom per cent by comparing reflection spectra C‐form powders. From uncertainty measurements, estimate made ordering energy (∼250 cm−1) which maximum difference Eu3+ located at sites.
We report the results of test measurements aimed at determining performances (6)Li doped glass scintillators for detection ultra-cold neutrons. Four types scintillators, GS1, GS3, GS10 and GS20, which differ by their concentrations, have been tested. The signal to background separation is fully acceptable. relative efficiencies determined as a function neutron velocity. find that has higher efficiency than others neutrons with velocities below 7 m/s. Two pieces irradiated high flux cold...
Radiotherapy treatments become more and accurate, using very small irradiation fields complex dose depositions. So dosimeters for real time in vivo dosimetry, suitable photons as well electrons beams are highly desired. In this context, a scintillating fiber dosimeter (SFD) has been developed by the Laboratoire de Physique Corpusculaire Caen (LPC Caen), France, collaboration with one of French regional center cancer treatment Centre Regional lutte contre le F. Baclesse (CRLCC Baclesse),...
We design a novel nano-gap electrode to measure the current of DNA molecule, by which current-voltage characteristics individual native DNA, Ag-DNA and Ni-DNA molecules are obtained, respectively. The results show that voltage gap Ag- is higher than conductance lower in neutral environment. structure transition from B- Z-DNA observed presence high concentrations nickel ions appears chaos state STM image U-V spectra characterization. But alkaline environment, rises decreases with increasing...
In this article, we reported a novel experiment results on Ag-doped DNA conductor in transverse direction. I-V characteristics were measured and the relative conductances calculated for different silver ions concentrations. With increase of concentration ions, conductive ability risen rapidly, conductance enhanced about three magnitudes reached stable value when Ag(+) was up to 0.005 mM. addition, Raman spectra carried out analyse confirm conduction mechanism.
Nanoscale metal-organic frameworks (MOFs) offer high biocompatibility, nanomaterial permeability, substantial specific surface area, and well-defined pores. These properties make MOFs valuable in biomedical applications, including biological targeting drug delivery. They also play a critical role tumor diagnosis treatment, cell targeting, identification, imaging, therapeutic methods such as delivery, photothermal effects, photodynamic therapy, immunogenic death. The diversity of with...
We describe a unique method for continuously and independently varying the rate-controlling time constant of excited Yb+3 ions in rare-earth up-converting phosphors. show, system BaYb2F8: Er, that at all values constant, power radiated is directly proportional to square observed radiative lifetime, accordance with 2-transfer model Auzel. The decrease this arises from introduction radiation-produced defects which selectively affect rather than activator ions. phenomenon can be used study...
IntroductionAccording to well known theoretical conjectures, supported by experimental observations, the combined charge conjugation and parity symmetry (CP) time reversal (T) are closely related CPTtheorem.There two unambiguous pieces of evidence for CP-and T-violation: forbidden decay modes neutral K B mesons excess baryonic matter over antimatter in present universe.