Effect of gamma radiation onto the properties of TeO<sub>2</sub>thin films

Arshak, K.; Korostynska, O.

doi:10.1108/13565360210445023

Cited by 12 publications

(7 citation statements)

References 16 publications

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“…These findings are in line with the results reported earlier for TeO 2 thin films, since the optical properties of thermally deposited TeO 2 thin films having a thickness of 50 nm also have shown a high sensitivity to gamma radiation [9,10]. Typical plots of the absorption spectra for as-deposited and γ-irradiated thin films (a) (b) of TeO 2 are shown in Fig.…”

Section: Resultssupporting

confidence: 91%

Cost-effective personal radiation dosimetry

Korostynska¹,

Arshak²,

Harris³

2009

Lithuanian J. Phys.

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Deep understanding of physical properties of the materials under the influence of radiation exposure is vital for the effective design of dosimeter devices. Detection of radiation is based on the fact that both the electrical and the optical properties of the materials undergo changes upon the exposure to ionizing radiation. It is believed that radiation causes structural defects (called colour centres or oxygen vacancies in oxides) leading to change in their density on the exposure to radiation. Thin film technology is considered as cost-effective alternative for a broad range of sensors. However, it is especially attractive for metal oxide films with melting point below 2000• C, as a wide range of films with mixed composition can be produced. The influence of radiation depends on both the dose and the parameters of the films including their thickness: the degradation is more severe for the higher dose and the thinner films. This paper reports on gamma radiation sensing properties of thermally evaporated NbO2 thin films. These films were deposited at different deposition rate and pressure. It was experimentally confirmed that the manufacturing parameters of the films affected their gamma radiation sensitivity.

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Section: Resultssupporting

confidence: 91%

Cost-effective personal radiation dosimetry

Korostynska¹,

Arshak²,

Harris³

2009

Lithuanian J. Phys.

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“…The data revealed that the sheet resistance linearly decreased from 36.4 to 28.7 with an increase in radiation dose up to a level of 108 Gy [16]. The mobility and Hall coefficient increased for these films.…”

Section: A Dosimeters Based On Metal Oxide Filmsmentioning

confidence: 87%

“…The values of sheet resistance for as-deposited and gamma irradiated thin film samples having a thickness of 220 nm were measured with a four-point probe [16]. The data revealed that the sheet resistance linearly decreased from 36.4 to 28.7 with an increase in radiation dose up to a level of 108 Gy [16].…”

Section: A Dosimeters Based On Metal Oxide Filmsmentioning

confidence: 99%

Thin and thick films of metal oxides and metal phthalocyanines as gamma radiation dosimeters

Arshak¹,

Arshak²,

Zleetni³

et al. 2004

IEEE Trans. Nucl. Sci.

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Numerous efforts were devoted to investigating the influence of radiation on metal oxides and polymer materials for dosimetry applications. Metal oxides, such as NiO, LaFeO 3 , CeO 2 , TeO 2 , In 2 O 3 , SiO and MnO, and polymers, such as CuPc, NiPc, MnPc and CoPc, were used as the active constituents in the fabrication of -radiation sensors. Thin and thick film devices were made in various topologies to form resistors, capacitors, pn-junctions and transistors. It was found that the properties of the active films (and, hence, their sensitivity to radiation) could be controlled by doping their constituent materials with carbon and mixing them in different proportions.The 60 Co and 137 Cs sources were used to expose the samples to -radiation. Current-voltage characteristics, optical absorption spectra, Raman spectra, SEM and XRD measurements were recorded for the samples after each exposure procedure and values of radiation damage were estimated.Thin film devices were found to be more sensitive to radiation than their thick film counterparts. Annealing was used to restore the properties of thick film devices after they were damaged with radiation. Thick films could be therefore reused on a repeatable basis, but thin film devices could not, as the heat treatments necessary for annealing were found to cause diffusion of the electrode materials.In this work, the possibility of fabricating a device that would satisfy the requirement of a particular application, such as sensitivity to -radiation and working dose region, was experimentally demonstrated. Based on the findings, these devices were found to provide a cost-effective alternative for room temperature real time -radiation dosimeter applications.Index Terms-Gamma radiation, metal oxides, metal phthalocyanines, MOS, optical and electrical properties, personal dosimeter, pn-junction, thin and thick films.

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“…In fact, the radiations with a high energy like gamma rays and X-rays can alter the concentration of oxygen vacancies and also create point defects and other structural defects in MOs [8]. Therefore, metal oxides can be used for the detection of high-energy radiation [9].…”

Section: Introductionmentioning

confidence: 99%

A Novel X-Ray Radiation Sensor Based on Networked SnO2 Nanowires

et al. 2019

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X-Ray radiation sensors that work at room temperature are in demand. In this study, a novel, low-cost real-time X-ray radiation sensor based on SnO2 nanowires (NWs) was designed and tested. Networked SnO2 NWs were produced via the vapor–liquid–solid technique. X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (SEM) analyses were used to explore the crystallinity and morphology of synthesized SnO2 NWs. The fabricated sensor was exposed to X-rays (80 kV, 0.0–2.00 mA) and the leakage current variations were recorded at room temperature. The SnO2 NWs sensor showed a high and relatively linear response with respect to the X-ray intensity. The X-ray sensing results show the potential of networked SnO2 NWs as novel X-ray sensors.

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Effect of gamma radiation onto the properties of TeO₂thin films

Cited by 12 publications

References 16 publications

Cost-effective personal radiation dosimetry

Cost-effective personal radiation dosimetry

Thin and thick films of metal oxides and metal phthalocyanines as gamma radiation dosimeters

A Novel X-Ray Radiation Sensor Based on Networked SnO2 Nanowires

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Effect of gamma radiation onto the properties of TeO2thin films

Cited by 12 publications

References 16 publications

Cost-effective personal radiation dosimetry

Cost-effective personal radiation dosimetry

Thin and thick films of metal oxides and metal phthalocyanines as gamma radiation dosimeters

A Novel X-Ray Radiation Sensor Based on Networked SnO2 Nanowires

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Effect of gamma radiation onto the properties of TeO₂thin films