Download or read book Radiation Damage in BaF2 Crystals written by and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of radiation damage and recovery have been studied in BaF2 crystals exposed to 6°Co radiation. The change in optical transmission and scintillation light output have been measured as a function of dose up to 4.7 x 106 rad. Although some crystals exhibit a small change in transmission, a greater change in scintillation light output is observed. Several 25 cm long crystals whichhave been irradiated show large changes in both transmission and light output. Recovery from radiation damage has been studied as a function of time and exposure to UV light. A long lived radiation induced phosphorescence has been observed in all irradiated samples which is distinct from the standard fast and slow scintillation emissions. The emission spectrum of the phosphorescence has been measured and shown a peakat (approximately)330 nm, near the region of the slow scintillation component. Results are given on the dependence of the decay time of the phosphorescence with dose.
Download or read book Radiation Damage in BaF2 Crystals written by and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Slow Component Suppression and Radiation Damage in Doped BaF2 Crystals written by and published by . This book was released on 1988 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Summary of Radiation Damage Studies in Barium Fluoride from the GEM Collaboration written by and published by . This book was released on 1992 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary is given of the radiation damage studies in BaF2 carried out by the GEM Collaboration. Data are presented on the effects of radiation from low energy gamma rays, energetic neutrons and high energy hadrons. Results are given from various analytical techniques used to study crystal purity and structure, and the present understanding of the principle causes of damage is discussed. A brief summary is also given of the conclusions of an Expert Panel which reviewed the situation of radiation damage in BaF2 for the GEM experiment.
Download or read book Radiation Damage in Barium Fluoride Detector Materials written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To develop radiation hard detectors, particularly for high energy physics studies, radiation damage is being studied in BaF2, both undoped and doped with La, Ce, Nd, Eu, Gd and Tm. Some dopants reduce radiation damage. In La doped BaF2 they reduce the unwanted long lifetime luminescence which interferes with the short-lived fluorescence used to detect particles. Radiation induced coloring is being studied with facilities for making optical measurements before, during and after irradiation with 6°C0 gamma rays. Doses of 106 rad, or less, create only ionization induced charge transfer effects since lattice atom displacement damage is negligible at these doses. All crystals studied exhibit color center formation, between approximately 200 and 800 nm, during irradiation and color center decay after irradiation. Thus only measurements made during irradiation show the total absorption present in a radiation field. Both undoped and La doped BaF2 develop damage at minimum detectable levels in the UV--which is important for particle detectors. For particle detector applications these studies must be extended to high dose irradiations with particles energetic enough to cause lattice atom displacement damage. In principle, the reduction in damage provided by dopants could apply to other applications requiring radiation damage resistant materials.
Download or read book Radiation Damage in BaF sub 2 Crystals written by and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of radiation damage and recovery have been studied in BaF[sub 2] crystals exposed to [sup 60]Co radiation. The change in optical transmission and scintillation light output have been measured as a function of dose up to 4.7 [times] 10[sup 6] rad. Although some crystals exhibit a small change in transmission, a greater change in scintillation light output is observed. Several 25 cm long crystals whichhave been irradiated show large changes in both transmission and light output. Recovery from radiation damage has been studied as a function of time and exposure to UV light. A long lived radiation induced phosphorescence has been observed in all irradiated samples which is distinct from the standard fast and slow scintillation emissions. The emission spectrum of the phosphorescence has been measured and shown a peakat [approximately]330 nm, near the region of the slow scintillation component. Results are given on the dependence of the decay time of the phosphorescence with dose.
Download or read book Radiation Damage in Cesium Iodide and Other Scintillating Crystals written by and published by . This book was released on 1992 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation damage in scintillating crystals is discussed in terms of how it can affect the performance of crystals used in a high resolution electromagnetic calorimeter. An attempt is made to identify certain principle causes of damage and describe how these may affect various parameters such as light output, energy resolution and noise. A discussion of radiation damage in barium fluoride is given as an example of how these effects can be understood and how the radiation hardness of a given crystal can be improved. Radiation damage in doped and undoped cesium iodide is compared in order to distinguish between damage occurring in the undoped material and those which could be caused by dopants such as sodium or thallium. New results on radiation damage in both doped and undoped CsI are also discussed.
Download or read book Calorimetry In High Energy Physics Proceedings Of The Third International Conference written by James L Siegrist and published by World Scientific. This book was released on 1993-08-30 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Light Exposure on Irradiated Barium Fluoride Crystals written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small barium fluoride crystals have been irradiated using cobalt-60 gamma rays under various illumination conditions to establish the effect of photo-bleaching of the radiation-induced color centers. This paper describes results of a few different experiments conducted at LLNL over the past few weeks.
Download or read book Detector Research And Development For The Superconducting Super Collider Proceedings Of The Symposium written by Valerie Kelly and published by World Scientific. This book was released on 1991-05-29 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last three years a significant program of detector technology research and development for high luminosity, high energy hadron-hadron colliders has been underway in the United States, Japan and Europe. In as much as the first formal steps have been undertaken to initiate the experimental program at the Superconducting Super Collider (SSC), it is appropriate to assess in detail the status of this R&D effort.Results and Plans for Advanced Technology R&D for Particle Physics Detectors Appropriate for SSC Experiments are Presented. Specific Topics include: Calorimetry; Particle Tracking and Identification Techniques; Vertex-Detection; Magnets; Front-End Electronics; Data Acquisition Electronics; Techniques in Triggering; Data Transmission; Data Analysis and Simulation Software; Studies on Radiation Damage to Materials and Electronics.
Download or read book Multicomponent Crystals Based on Heavy Metal Fluorides for Radiation Detectors written by Boris Petrovich Sobolev and published by Institut d'Estudis Catalans. This book was released on 1994 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Damage in Crystals written by Chadderton and published by . This book was released on 1973-01-01 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heavy Scintillators for Scientific and Industrial Applications written by F. De Notaristefani and published by Atlantica Séguier Frontières. This book was released on 1993 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Effects in Materials written by Waldemar Alfredo Monteiro and published by BoD – Books on Demand. This book was released on 2016-07-20 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of radiation effects has developed as a major field of materials science from the beginning, approximately 70 years ago. Its rapid development has been driven by two strong influences. The properties of the crystal defects and the materials containing them may then be studied. The types of radiation that can alter structural materials consist of neutrons, ions, electrons, gamma rays or other electromagnetic waves with different wavelengths. All of these forms of radiation have the capability to displace atoms/molecules from their lattice sites, which is the fundamental process that drives the changes in all materials. The effect of irradiation on materials is fixed in the initial event in which an energetic projectile strikes a target. The book is distributed in four sections: Ionic Materials; Biomaterials; Polymeric Materials and Metallic Materials.
Download or read book Radiation damage in crystals written by Lewis T. Chadderton and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Damage in Crystals written by Ivor Armstrong Richards and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Damage in CaF2 and BaF2 Investigated by the Channeling Technique written by Ragnar Hellberg and published by . This book was released on 1973 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
