Concept

Iodure de césium

L'iodure de césium (CsI) est le sel du césium avec l'iode. En physique des particules et en physique nucléaire, l'iodure de césium est utilisé une fois dopé avec du thallium comme détecteur de rayons gamma, ceux-ci interagissant avec la forme cristalline du composé pour produire de la lumière visible (dans un détecteur à scintillation).

Source officielle

https://fr.wikipedia.org/wiki/Iodure_de_césium

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Comparative study of the I-UO2 and Cs-UO2 systems under conditions representative of irradiated fuel

A comparative study of the behaviour of Iodine and Caesium in uranium oxide was conducted. UO2 samples implanted with Iodine or Caesium underwent thermal treatment (4 h at 900 °C or 1 h at 1200 °C) in a controlled atmosphere (Ar+0.03% H2O/H2). Thereafter, the samples were analysed using a range of experimental techniques to study their structural and chemical evolution. Additionally, thermodynamic calculations were performed in order to optimize heat treatment conditions before performing tests, and to assi

2026

Fluorinated Methylammonium Cation Containing Perovskite Solar Cells With Over 25% Power Conversion Efficiency

High‐performance perovskite solar cells (PSCs) are typically made using formamidinium CH(NH 2 ) 2 + (FA + ), cesium Cs +, and the thermally unstable methylammonium CH 3 NH 3 + (MA + ) monovalent cations. Excluding unstable MA + leads to perovskite compositions with increased stabilities and decreased bandgaps. This study introduces a novel approach using a simple fluorinated methylammonium CFH 2 NH 3 + (FMA + ) cation capable of doping into the perovskite‐framework. With the addition of an optimized quantit

Wiley2026

Simulation of CMOS-based Amorphous Silicon Microchannel Plate Detectors for Metascintillators

Christophe Ballif

CMOS-based Amorphous Silicon Microchannel Plate (CAMCP) detectors are devices built on and read-out by a multi-channel CMOS tile, using a PLANACON photocathode and a hexagonal grid of high aspect ratio micro-channels. Metascintillators are combinatory scintillators comprising more than one type of material, exploiting the electron leakage from a dense scintillator to a fast one. The two structures were simulated together using GATE. The scintillator had dimensions of 24×9.6×7.7 mm3, made of 22 slabs of LYSO

Institute of Electrical and Electronics Engineers2024

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Concepts associés (2)

Scintillateur

Un scintillateur est un matériau qui émet de la lumière à la suite de l'absorption d'un rayonnement ionisant (photon ou particule chargée). Il existe deux grandes familles de scintillateurs : les scintillateurs organiques : (anthracène, naphtalène, stilbène et terphényle) que l'on retrouve sous forme de monocristaux ou en solution liquide, les scintillateurs inorganiques utilisés sous forme de monocristaux (iodure de sodium, germanate de bismuth), ou bien sous forme de poudres incorporées à un substrat.

Fluorure de césium

Le fluorure de césium (CsF) est un composé ionique qui se présente généralement sous la forme d'un solide blanc hygroscopique. Il est plus soluble et se dissocie plus facilement que le fluorure de sodium ou le fluorure de potassium. Il peut se trouver sous sa forme anhydre, et s'il se présente sous forme hydratée il peut être séché facilement par chauffage à durant deux heures sous vide .

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Source officielle

https://fr.wikipedia.org/wiki/Iodure_de_césium

À propos de ce résultat

Séances de cours associées (1)

Introduction au PET MOOC: Principes fondamentaux de l'imagerie biomédicale : Ultrasons, rayons X, tomographie par émission de positrons (TEP) et applications

Couvre les bases de la Tomographie Positron Emission, y compris l'expression des gènes d'imagerie et la détection des coïncidences.

Publications associées (9)

Comparative study of the I-UO2 and Cs-UO2 systems under conditions representative of irradiated fuel

2026

Fluorinated Methylammonium Cation Containing Perovskite Solar Cells With Over 25% Power Conversion Efficiency

Wiley2026

Simulation of CMOS-based Amorphous Silicon Microchannel Plate Detectors for Metascintillators

Christophe Ballif

Institute of Electrical and Electronics Engineers2024

Afficher plus

Personnes associées (2)

Christophe Ballif

Christophe Ballif is director of the Phototovoltaics and Thin Film Electronics Laboratoryb) (PV-Lab at the institute of microengineering (IMT) in Neuchâtel (part of the EPFL since 2009). The lab focus is on the science and technology of high efficiency heterojunction crystalline cells,so-called passivating contacts for solar cells, multi-junction solar cells include novel generation Perovskite on innovative optical high speed detector and on various macroelectronics application. It also deals with energy management with a focus on integration of solar electricity into the energy system. The PV-Lab has strongly contributed to technology transfer and industrialization of novel devices and full technology with numerous companies. Christophe Ballif graduated as a physicist from the EPFL in 1994, where he also obtained in 1998 his Phd degree working on novel PV materials. He accomplished his postdoctoral research at NREL (Golden, US) on compound semiconductor solar cells (CIGS and CdTe). He worked then at the Fraunhofer ISE (Ge) on crystalline silicon photovoltaics (monocrystalline and multi-crystalline) until 2003 and then at the EMPA in Thun (CH) before becoming full professor at the University of Neuchâtel IMT in 2004, taking over the chair of Prof. A. Shah. Since 2013, C.Ballif is also the director of the new CSEM PV-Center, also located in Neuchâtel. The CSEM PV-Center is focussing more on industrialisation and technology transfer in the field of solar energy, including solar electricity management and storage. At the core of the CSEM PV-center activities lies several "pilot lines" for various kinds of solar cells manufacturing, with a focus coating technologies, wet chemistry processes for crystalline silicon, metalisation techniques for solar cells, and a platform for developing "ideal packaging solutions and polymers" for PV modules. In addition, joined facitilites between CSEM and EPFL of over 800 m2 are available for modules manufacturing, measuring and accelerated aging. CSEM PV-center has also full team dedicated to storage and energy systems and operates a joined center with BFH in Biel for research on electrochemical storage. He (co-) authored over 500 journal and technical papers, as well as several patents. He is an elected member of the SATW, member of the scientific council of the Swiss AEE, and member of the board of the EPFL Energy center. In 2016, he recieved the Becquerel prize for his contributions to the field of high efficiency photovoltaics.

Mohammad Khaja Nazeeruddin

Dr. Md. K. Nazeeruddin received M.Sc. and Ph. D. in inorganic chemistry from Osmania University, Hyderabad, India. He joined as a Lecturer in Deccan College of Engineering and Technology, Osmania University in 1986, and subsequently, moved to Central Salt and Marine Chemicals Research Institute, Bhavnagar, as a Research Associate. He was awarded the Government of Indias fellowship in 1987 for study abroad. After one year postdoctoral stay with Prof. Graetzel at Swiss federal institute of technology Lausanne (E P F L), he joined the same institute as a Senior Scientist. His current research focuses on Dye-sensitized solar cells, Hydrogen production, Light-emitting diodes and Chemical sensors. He has published more than 380 peer-reviewed papers, ten book chapters, and inventor of 40 patents. The high impact of his work has been recognized with invitations to speak at over 80 international conferences, including the MRS Fall (USA, 2006) and Spring 2011 Meetings, GORDON conference (2014), and has been nominated to the OLLA International Scientific Advisory Board. He appeared in the ISI listing of most cited chemists, and has more than 33'500 citations with an h-index of 89. He is teaching "Functional Materials" course at EPFL, and Korea University; directing, and managing several industrial, national, and European Union projects on Hydrogen energy, Photovoltaics (DSC), and Organic Light Emitting Diodes. He was awarded EPFL Excellence prize in 1998 and 2006, Brazilian FAPESP Fellowship in 1999, Japanese Government Science & Technology Agency Fellowship, in 1998, Government of India National Fellowship in 1987-1988. Recently he has been appointed as World Class University (WCU) professor by the Korea University, Jochiwon, Korea (http://dses.korea.ac.kr/eng/sub01_06_2.htm) and Adjunct Professor by the King Abdulaziz University, Jeddah, Saudi Arabia.

Concepts associés (2)

Scintillateur

Fluorure de césium

Personnes associées (2)

Christophe Ballif

Mohammad Khaja Nazeeruddin