Cathodic Protection for Nuclear Waste Packaging Under Gamma Ray Irradiation by Using TiO2 Coating Combined with Glass Scintillators

1994 ◽  
Vol 353 ◽  
Author(s):  
Ryutaro Fujisawa ◽  
Shigeo Tsujikawa
Keyword(s):  
Single Crystal ◽  
Nuclear Waste ◽  
Gamma Rays ◽  
Cathodic Protection ◽  
Electrode Potential ◽  
Gamma Ray ◽  
304 Stainless Steel ◽  
Long Time ◽  
Gamma Ray Irradiation ◽  
Logarithmic Relationship

AbstractThe photoelectrochemical behaviours of a TiO2 single crystal and TiO2 coating were studied, for the purposes of cathodic protection of stainless steels and Cu via the TiO2 coating combined with glass scintillators under gamma ray irradiation. It was confirmed that a TiO2 coating could protect 304 stainless steel cathodically from crevice corrosion under illumination. A logarithmic relationship between the photopotential of single crystal TiO2(rutile) and light intensity was found, moreover, the photopotential was found to be least noble when wavelength equals 375 nm. Under illumination by gamma rays combined with the glass scintillators, the electrode potential of single crystal TiO2 was found to shift in the less noble direction by about 200 mV. Therefore, the technique of cathodic protection by TiO2 coating is considered to be applicable to protect the packaging metal from corrosion for a long time.

Gamma-ray irradiation effect on ZnO bulk single crystal: Origin of low resistivity

2019 ◽  
Vol 292 ◽  
pp. 24-26 ◽  
Author(s):  
J. Tashiro ◽  
Y. Torita ◽  
T. Nishimura ◽  
K. Kuriyama ◽  
K. Kushida ◽  
...  
Keyword(s):  
Single Crystal ◽  
Gamma Ray ◽  
Irradiation Effect ◽  
Bulk Single Crystal ◽  
Low Resistivity ◽  
Gamma Ray Irradiation

scholarly journals Gamma Ray-Induced Polymerization and Cross-Linking for Optimization of PPy/PVP Hydrogel as Biomaterial

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 111 ◽  
Author(s):  
Jin-Oh Jeong ◽  
Jong-Seok Park ◽  
Young-Ah Kim ◽  
Su-Jin Yang ◽  
Sung-In Jeong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cell Viability ◽  
Gamma Rays ◽  
Biomedical Applications ◽  
Gamma Ray ◽  
The Other ◽  
Cross Linking ◽  
Gamma Ray Irradiation ◽  
Good Cell ◽  
Scanning Electron

Conducting polymer (CP)-based hydrogels exhibit the behaviors of bending or contraction/relaxation due to electrical stimulation. They are similar in some ways to biological organs and have advantages regarding manipulation and miniaturization. Thus, these hydrogels have attracted considerable interest for biomedical applications. In this study, we prepared PPy/PVP hydrogel with different concentrations and content through polymerization and cross-linking induced by gamma-ray irradiation at 25 kGy to optimize the mechanical properties of the resulting PPy/PVP hydrogel. Optimization of the PPy/PVP hydrogel was confirmed by characterization using scanning electron microscopy, gel fraction, swelling ratio, and Fourier transform infrared spectroscopy. In addition, we assessed live-cell viability using live/dead assay and CCK-8 assay, and found good cell viability regardless of the concentration and content of Py/pTS. The conductivity of PPy/PVP hydrogel was at least 13 mS/cm. The mechanical properties of PPy/PVP hydrogel are important factors in their application for biomaterials. It was found that 0.15PPy/PVP20 (51.96 ± 6.12 kPa) exhibited better compressive strength than the other samples for use in CP-based hydrogels. Therefore, it was concluded that gamma rays can be used to optimize PPy/PVP hydrogel and that biomedical applications of CP-based hydrogels will be possible.

scholarly journals Study on Induced Current of Iron Plate Irradiated by Pulsed Gamma Rays

2018 ◽  
Vol 53 ◽  
pp. 01007
Author(s):  
Yinghong Zuo ◽  
Maoyu Zhang ◽  
Guoxin Cheng ◽  
Shengli Niu
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Transient Current ◽  
Current Response ◽  
Induced Current ◽  
Metal Component ◽  
Iron Plate ◽  
Gamma Ray Irradiation ◽  
Charge Deposition ◽  
The Relationship

To obtain the transient current response law of the metal component irradiated by pulsed gamma rays, the pulsed gamma ray irradiation experiment of the iron plate was carried out on “Qiangguang-I” accelerator. The transient current of iron plate generated by pulsed gamma rays was measured and analysed, and the relationship between the amplitude of pulse current and the dose rate of gamma rays was obtained. The results show that the current response sensitivity of the iron plate is about 5.7×10-7(A/m2)/(Gy/s) when the gamma rays with the energy of 0.8 MeV irradiate the iron plate. The charge deposition rate in the iron plate can be obtained by Monte Carlo simulation, and then it can be converted to gamma ray induced current of the metal component irradiated by gamma rays.

Effects of Fabrication Process on the Electrical Characteristics of n-Channel MOSFETs Irradiated with Gamma-Rays

2008 ◽  
Vol 600-603 ◽  
pp. 707-710
Author(s):  
Shigeomi Hishiki ◽  
Naoya Iwamoto ◽  
Takeshi Ohshima ◽  
Hisayoshi Itoh ◽  
Kazu Kojima ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Radiation Resistance ◽  
Carbon Coating ◽  
Gamma Ray ◽  
Sample Surface ◽  
Fabrication Process ◽  
Channel Mobility ◽  
Carbon Coated ◽  
Gamma Ray Irradiation ◽  
Post Implantation

The effect of the fabrication process of n-channel 6H-SiC MOSFETs on their radiation resistance is investigated. MOSFETs that post implantation annealing for source and drain was carried out with carbon coating on the sample surface are compared to MOSFETs that post implantation annealing was carried out without carbon coating. The radiation resistance (gamma-rays) of the carbon-coated MOSFETs is higher than that of non-coated ones. The channel mobility for MOSFETs whose gate oxide was formed using pyrogenic or dry oxidation process dose not change by gamma-ray irradiation below 1x105 Gy. The value of channel mobility slightly increases with increasing dose above 1x105 Gy. No significant increase in irradiation induced interface traps is observed.

Oxygen Ion Induced Charge in SiC MOS Capacitors Irradiated with Gamma-Rays

2011 ◽  
Vol 679-680 ◽  
pp. 362-365 ◽  
Author(s):  
Takeshi Ohshima ◽  
Naoya Iwamoto ◽  
Shinobu Onoda ◽  
Takahiro Makino ◽  
Shinji Nozaki ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Ion Beam ◽  
Gate Oxide ◽  
Peak Amplitude ◽  
Induced Current ◽  
Mos Capacitors ◽  
Oxygen Ion ◽  
Before And After ◽  
Gamma Ray Irradiation

Charge induced in 6H-SiC nMOS capacitors by 15 MeV oxygen ion microbeams was measured using Transient Ion Beam Induced Current (TIBIC) before and after gamma-ray irradiations. The peak amplitude of TIBIC signals decreases and the fall time increases with increasing number of incident ions. The decrease in the TIBIC peak eventually saturated. The TIBIC signal can be refreshed to its original shape by applying a positive bias of + 1V to gate oxide. Small decrease in both the peak amplitude of TIBIC signal and collected charge was observed due to gamma-ray irradiation.

scholarly journals THE ADAPTATION LEVEL OF ALFALFA (MEDICAGO SATIVA L.) THAT IRRADIATED WITH GAMMA RAYS ON A FIELD SCALE

Pastura ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Prihantoro, I. ◽  
Anandia, A. ◽  
Aryanto, A. T. ◽  
Setiana, M. A. ◽  
Karti, P. D. M. H.
Keyword(s):  
Medicago Sativa ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Adaptation Level ◽  
Field Scale ◽  
Leaf Color ◽  
Randomized Design ◽  
Gamma Ray Irradiation ◽  
Medicago Sativa L ◽  
Dark Green

Alfalfa (Medicago sativa L.) a high nutritious and palatability legume for ruminant. Constrain of alfalfa availability in Indonesia are due to the plant adaptability in tropical environment. Aim of the study was to measure the adaptation level of alfalfa that irradiated with gamma rays on a field scale. The study consisted of four types of plant sources, mutation plants with different gamma ray levels (0Gy, 200Gy, 300Gy and 400Gy). Plant tillers was analyzed with a complete randomized design with 3 replications, 20 plants per replication. Growth capability, leaf color, flowering time and pest attack level were analyzed descriptively. The results showed that alfalfa irradiated with 300 Gy significantly (p<0.05) produced highest tillers. Irradiated 300 Gy plant gave better result on growth capability, flowering capability, and number of not attack plant from pests. The higher level of gamma ray irradiation showed the changed in leaf color levels from dark green to light green. Keywords: alfalfa (Medicago sativa L.), mutation, gamma ray irradiation, field scale

scholarly journals Diversity Induction of Dendrobium sylvanum Orchid through In Vitro Irradiation of Gamma Ray

2018 ◽  
Vol 10 (3) ◽  
pp. 691-697
Author(s):  
Eka Puji Lestari ◽  
Ahmad Yunus ◽  
Sugiyarto Sugiyarto
Keyword(s):  
Tissue Culture ◽  
Gamma Ray ◽  
Leaf Length ◽  
The Other ◽  
New Variety ◽  
New Finding ◽  
Long Time ◽  
Gamma Ray Irradiation ◽  
The Impact

Dendrobium sylvanum orchid is categorized as lowland habitus orchid and able to survive wihtout any shade. Orchid cultivation takes a very long time so it needs faster cultivation and producing large quantities. Therefore, it is necessary to do orchid culture by using tissue culture processes and then given gamma ray irradiation to bring up new characters in the orchid .The purpose of this research was to discover the impact of gamma ray irradiation in vitro to the diversity of D. sylvanum. The doses of gamma ray used in this research were 0 Gy, 15 Gy, 30 Gy, 45 Gy, and 60 Gy. The results obtained indicated that mutation mostly occurred on the treatment with 15 Gy (4.4 cm of plant height, 2.67 of leaves, 2.36 cm of leaf length, 0.49 cm of leaf width, and 5.33 of root strands) compared to the other doses and the control plants. The new finding in this research is the gamma ray dose that can optimally stimulate the mutation in D. sylvanum. This information is useful to generate the new variety in orchid cultivation in Indonesia. This research provides innovation in orchid cultivation and new variety that is possible to arise after the mutation.

scholarly journals Perubahan Morfologi dan Pertumbuhan Handeuleum (Graptophyllum pictum L. Griff) akibat Iradiasi Sinar Gamma

2016 ◽  
Vol 43 (3) ◽  
pp. 235
Author(s):  
Arrin Rosmala ◽  
Nurul Khumaida ◽  
Dewi Sukma
Keyword(s):  
Medicinal Plants ◽  
Gamma Rays ◽  
Irradiation Dose ◽  
Leaf Morphology ◽  
Color Index ◽  
Gamma Ray ◽  
Morphological Changes ◽  
Morphological Alteration ◽  
Green Color ◽  
Gamma Ray Irradiation

<p>ABSTRACT</p><p>Handeuleum (Graptophyllum pictum L.Griff) is a medicinal plant widely used as a traditional medicine due to its benefecial content. Therefore, it should be developed as one of the leading Indonesian medicinal plants. The purpose of this research was to study the effect of gamma ray irradiation on morphological alteration and growth of Handeuleum accession from Bogor. The doses of gamma rays were 0, 15, 30, 45, 60, 75, 90, and 105 Gy. The results of the research showed that gamma-ray irradiation induced morphological changes and influences the growth of Handeuleum. Irradiation dose at rate of 105 Gy produced new leaf morphology in Handeuleum, namely cordate. Doses of 60, 75, 90, and 105 Gy produce stunted plants with stiff and yellowish-green leaves. The dose of 45 Gy produced relative green color index which was higher than the control plants.</p><p>Keywords: handeuleum, gamma irradiations</p>

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