MECHANISTIC MODELING PREDICTS NO SIGNIFICANT DOSE RATE EFFECT ON HEAVY-ION CARCINOGENESIS AT DOSE RATES RELEVANT FOR SPACE EXPLORATION

The ozone yield from the radiolysis of gaseous oxygen has been measured to be G(O3) = 12.8 ± 0.6 at 1026–1027 eV g−1 s−1 and to be G(O3) = 6.2 ± 0.6 at 1016 eV g−1 s−1. The latter result depends on a new determination of the stoichiometry of the oxidation of iodide by ozone. It is proposed that the difference in yields between the two dose rates is due to differences in ion-recombination processes.

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The Effect of Low Dose-Rate Irradiation on the Microstructure of 304 Stainless Steel

MRS Proceedings ◽

10.1557/proc-540-433 ◽

1998 ◽

Vol 540 ◽

Author(s):

J. I. Cole ◽

T. R. Allen

Keyword(s):

Stainless Steel ◽

Dose Rate ◽

Low Dose ◽

Rate Effect ◽

304 Stainless Steel ◽

Microstructural Development ◽

Dose Rates ◽

Low Dose Rate ◽

Radiation Induced ◽

Dose Rate Effect

AbstractChanges in mechanical and corrosion properties caused by the development of radiation-induced microstructures have relevance to the aging and lifetime extension of light water reactors (LWR‘s). However, much of the current data related to microstructural development in irradiated metals are generated from studies carried out at much higher dose-rates than encountered in LWR‘s. An opportunity exists to study the influence of low dose-rate irradiation on microstructural development for a variety of structural and surveillance materials extracted from the experimental breeder reactor EBR-lI. In this study, irradiated 304 stainless steel hexagonal “hex” duct material is examined in order to compare microstructures in the dose-rate range of 10−7 - 10−9 dpa/sec. The samples, taken from the reflector locations in EBR-II, experienced a total dose between 10 and 12 dpa at a temperature of ∼375 °C. Transmission electron microscopy (TEM) analysis reveals that there is a moderate dose-rate effect on microstructural development for samples irradiated in the range of 2 × 10−8 to 4 × 10−8. dpa/sec, however a substantial dose-rate effect exists between dose-rates of 2 × 10−8 and 1 × 10−9 dpa/sec Results detail the development of the microstructure in terms of radiation-induced cavities, dislocations, and precipitates.

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Phase-field simulation of dose rate effect on the Cu precipitation with neutron irradiation

Physical Chemistry Chemical Physics ◽

10.1039/d0cp05777k ◽

2021 ◽

Vol 23 (7) ◽

pp. 4217-4229

Author(s):

Shahid Maqbool ◽

Yongsheng Li ◽

Suleman Muhammad ◽

Zhengwei Yan ◽

Shujing Shi

Keyword(s):

Dose Rate ◽

Neutron Irradiation ◽

Phase Field ◽

Volume Fraction ◽

Rate Effect ◽

Phase Field Simulation ◽

Field Simulation ◽

Cu Alloys ◽

Dose Rate Effect

Radiation-enhanced precipitation (REP) in Fe–Cu alloys results in higher volume fraction and radius of Cu precipitates.

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Dose-rate effect of low-energy electron beam irradiation on bacterial content in chilled turkey

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/640/3/032006 ◽

2021 ◽

Vol 640 (3) ◽

pp. 032006

Author(s):

U A Bliznyuk ◽

P Yu Borchegovskaya ◽

A P Chernyaev ◽

V S Ipatova ◽

V A Leontiev ◽

...

Keyword(s):

Electron Beam ◽

Dose Rate ◽

Electron Beam Irradiation ◽

Rate Effect ◽

Low Energy ◽

Energy Electron ◽

Beam Irradiation ◽

Low Energy Electron ◽

Bacterial Content ◽

Dose Rate Effect

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The conversion model of low dose rate effect in bipolar transistors

2009 European Conference on Radiation and Its Effects on Components and Systems ◽

10.1109/radecs.2009.5994661 ◽

2009 ◽

Cited By ~ 15

Author(s):

V. S. Pershenkov ◽

D. V. Savchenkov ◽

A. S. Bakerenkov ◽

V. N. Ulimov ◽

A. Y. Nikiforov ◽

...

Keyword(s):

Dose Rate ◽

Low Dose ◽

Bipolar Transistors ◽

Rate Effect ◽

Conversion Model ◽

Low Dose Rate ◽

Dose Rate Effect

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Serum Metabolomic Alterations Associated with Cesium-137 Internal Emitter Delivered in Various Dose Rates

Metabolites ◽

10.3390/metabo10070270 ◽

2020 ◽

Vol 10 (7) ◽

pp. 270

Author(s):

Heng-Hong Li ◽

Yun-Tien Lin ◽

Evagelia C. Laiakis ◽

Maryam Goudarzi ◽

Waylon Weber ◽

...

Keyword(s):

Dose Rate ◽

Cumulative Dose ◽

Low Dose ◽

Biological Effects ◽

Serum Samples ◽

Dose Rates ◽

Sphingosine 1 Phosphate ◽

Cesium 137 ◽

Dose Rate Effect ◽

Medium Dose

Our laboratory and others have use radiation metabolomics to assess responses in order to develop biomarkers reflecting exposure and level of injury. To expand the types of exposure and compare to previously published results, metabolomic analysis has been carried out using serum samples from mice exposed to 137Cs internal emitters. Animals were injected intraperitoneally with 137CsCl solutions of varying radioactivity, and the absorbed doses were calculated. To determine the dose rate effect, serum samples were collected at 2, 3, 5, 7, and 14 days after injection. Based on the time for each group receiving the cumulative dose of 4 Gy, the dose rate for each group was determined. The dose rates analyzed were 0.16 Gy/day (low), 0.69 Gy/day (medium), and 1.25 Gy/day (high). The results indicated that at a cumulative dose of 4 Gy, the low dose rate group had the least number of statistically significantly differential spectral features. Some identified metabolites showed common changes for different dose rates. For example, significantly altered levels of oleamide and sphingosine 1-phosphate were seen in all three groups. On the other hand, the intensity of three amino acids, Isoleucine, Phenylalanine and Arginine, significantly decreased only in the medium dose rate group. These findings have the potential to be used in assessing the exposure and the biological effects of internal emitters.

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