Gamma Radiation Detection Response of Pt/PZT/SRO Based Capacitor for Dosimetry Application
01 Oct 2020-IEEE Electron Device Letters (Institute of Electrical and Electronics Engineers (IEEE))-Vol. 41, Iss: 10, pp 1564-1567
TL;DR: In this paper, the effect of gamma radiation on the intrinsic electrical behavior of PZT capacitors was explored in form of the currentvoltage and capacitance-voltage properties.
Abstract: Radiation induced changes in the electrical properties of PbZrTiO3 (PZT) thin films have been studied for dosimetry application. The radiation detection was based on radiation induced changes in the electrical properties under the influence of gamma radiation. Epitaxial heterostructure of ferroelectric PbZr0.52 Ti0.48O3 (001)/SrRuO3 (SRO) were grown on single crystal SrTiO3 (001) substrates by pulsed laser deposition and platinum (Pt) electrode was deposited on top of the PZT film. The maximum capacitance of the heteroepitaxial capacitor devices was $\approx ~25$ pF with a corresponding small leakage current. The effect of gamma ( $\gamma $ -ray) irradiation on the intrinsic electrical behavior of the Lead Zirconate Titanate (PZT) capacitor devices were explored in form of the current–voltage (I–V) and capacitance–voltage (C–V) properties. The PZT devices were exposed to a 60Co Gamma source with 2.8 kGy/h dose rate from 0 kGy to 400 kGy doses. Gamma radiation induced broadening was observed in full width half maxima (FWHM) of the x-ray diffraction (00l) peak with the increasing gamma doses. All devices showed a consistence changes in conductance and capacitance with increasing gamma doses. The results demonstrated linear relationship in electrical response of PZT thin-film capacitors as a function of gamma doses. The device showed significant changes in the values of current and capacitance with the increase in dose up to 400 kGy and are therefore suitable for high-dose dosimetry applications.
Citations
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TL;DR: In this article, Bethe and Morrison present a theory of elementary nuclear theory, which they call the "elementary nuclear theory" (ENTT), based on the concept of the atom.
Abstract: Elementary Nuclear Theory By Prof. Hans A. Bethe and Prof. Philip Morrison. Second edition. Pp. xi + 274. (New York: John Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1956.) 50s. net.
308 citations
References
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01 Jan 2004-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: In this article, an experimental investigation of the radiation damage induced on CdTe and CdZnTe semiconductor detectors has been performed by exposing a set of samples to increasing doses of 2 MeV protons produced by a 1.7 MV Tandetron accelerator.
Abstract: An experimental investigation of the radiation damage induced on CdTe and CdZnTe semiconductor detectors has been performed by exposing a set of samples to increasing doses of 2 MeV protons produced by a 1.7 MV Tandetron accelerator. The modifications in the detector performances have been studied through the dark current measurements and spectroscopic response analyses at low and medium energies. The deep levels of the materials have been investigated by means of Photo Induced Current Transient Spectroscopy analyses. The evolution of some important parameters (energy resolution, charge collection efficiency, leakage current, activation energies and capture cross-section of deep level defects) have been monitored with respect to increasing proton exposures and the results obtained give us some important indications on the modifications of the material properties as well as on the performances degradation of the detectors.
31 citations
"Gamma Radiation Detection Response ..." refers background in this paper
...This provides a higher linear attenuation coefficient [19]–[21], comparable to CZT and approximately twice than that of...
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...γ -ray irradiation [19], designating the good sustainability of...
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TL;DR: In this article, the effect of absorbed dose on Mg-doped ZnO thin film was investigated for the first time, and it was observed that surface morphology is changed significantly with absorbed dose.
Abstract: High energy photon of gamma radiation interacts with matter and alter physical properties of materials. Optoelectronic and photonic devices, which are placed at space satellite and near radiation source like a nuclear reactor, can be exposed to gamma radiation. Effect of gamma radiation must be investigated before applying a material in a high radiation environment. In this paper, a potential material for optoelectronics and photonic devices, Mg-doped ZnO thin film of 200 nm was fabricated on a glass slide by sol-gel spin-coating method and irradiated with 579.96 Giga gamma photons per second per centimeter square surface area by Co-60 gamma source. Effect of absorbed dose on Mg-doped ZnO thin film was investigated for the first time. Variation of surface morphology, optical properties, and lattice parameters, caused by gamma radiation absorption doses in the range of 0 kGy–100 kGy, was assessed. It is observed that surface morphology is changed significantly with absorbed dose. With non-linear and monotonic fashion, dislocation density and lattice strain tend to increase, whereas crystallite size and bandgap tend to decrease with absorbed dose. Transmittance and absorbance spectra are changed considerably as well.
30 citations
"Gamma Radiation Detection Response ..." refers background in this paper
...Radiation induced defects are generated when high energy radiation dissipates energy in the PZT thin film, give rise broadening in FWHM [23]....
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...An increase in full width at half maximum (FWHM) was observed of the (001) XRD peak....
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TL;DR: In this article, it was shown that F-centers are efficiently formed in crystals doped with CO 3 2− and OH − ions, and the use of sodium as a co-activator to increase the radiation stability of CsI(Tl) crystals has been considered.
Abstract: Radiation defect formation processes in large dimension CsI crystal scintillators have been considered. It is shown that F-centers are efficiently formed in crystals doped with CO 3 2− and OH − ions. Sodium ions harden CsI crystals against radio-chemical reactions of F-centers, and HCO 3 − ion formation. The use of sodium as a co-activator to increase the radiation stability of CsI(Tl) crystals has been considered.
25 citations
"Gamma Radiation Detection Response ..." refers background in this paper
...oxygen vacancies, in turn changes the electrical properties during exposure to gamma rays [11], [12]....
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TL;DR: In this article, a single step epitaxial lift-off technique was used to pattern high temperature grown perovskite multilayers through the use of a pre-patterned AlOx mask which acts as a high temperature sacrificial template.
Abstract: Epitaxial PbZr0.52Ti0.48O3 (PZT 52/48) heterostructures incorporating SrRuO3 electrodes were patterned through a single step epitaxial lift-off technique without using any acidic etching. This procedure enables patterning of high temperature grown perovskite multilayers through the use of a pre-patterned AlOx mask which acts as a high temperature sacrificial template. Ferroelectric properties of structured PZT grown on (001) SrTiO3 substrates as well as on commercially important platinized Si were investigated in capacitor configuration analogous to structures previously prepared through wet etching. In addition, the patterning technique is shown to be compatible with e-beam lithography for preparation of sub-micron device structures consisting of ferroelectric perovskite materials.
23 citations
"Gamma Radiation Detection Response ..." refers methods in this paper
...48O3 (250 nm)/SrRuO3(100 nm) films were grown by PLD on SrTiO3(001) substrate and additional details are mentioned elsewhere on the growth parameters [22]....
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TL;DR: This review elaborates on a number of points such as attitudes toward tracking, review of practices in large parts of the world, description of various elements for exposure and dose tracking, how to use the information available from tracking, achievements and stumbling blocks in implementation to date, templates for implementation of tracking.
Abstract: Much of the emphasis on radiation protection about 2 decades ago accrued from the need for protection of radiation workers and collective doses to populations from medical exposures. With the realization that individual patient doses were rising and becoming an issue, the author had propagated the concept of a smart card for radiation exposure history of individual patients. During the last 7 years, much has happened wherein radiation exposure and the dose history of individual patients has become a reality in many countries. In addition to dealing with overarching questions, such as "Why track, what to track, and how to track?," this review elaborates on a number of points such as attitudes toward tracking, review of practices in large parts of the world, description of various elements for exposure and dose tracking, how to use the information available from tracking, achievements and stumbling blocks in implementation to date, templates for implementation of tracking at different levels of health care, the role of picture archiving and communication systems and eHealth, the role of tracking in justification and optimization of protection, comments on cumulative dose, how referrers can use this information, current provisions in international standards, and future actions.
22 citations