Free radicals in x-irradiated single crystals of sucrose: a reexamination

Sagstuen, Einar; Lund, Anders; Awadelkarim, Osama O.; Lindgren, Mikael; Westerling, Jan

doi:10.1021/j100280a022

Cited by 42 publications

(47 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, an unpaired electron can be created at a free radical in carbon-bound hydrogen by the irradiation in carbohydrate material. Electron-nuclear double resonance (ENDOR) spectroscopy provided information about protons in the vicinity of the trapped electron [7][8][9]. ENDOR spectroscopy shows that the unpaired electron of free radicals was located at carbon-bound hydrogen [10,11].…”

Section: Methodsmentioning

confidence: 99%

Dosimetry Application of Irradiated D-fructose using the Electron Paramagnetic Resonance

Son¹,

Choi²,

Kim³

et al. 2012

Journal of Magnetics

View full text Add to dashboard Cite

We examine dosimetry application of irradiated D-fructose materials using electron paramagnetic resonance (EPR). Consequently, we consider that fructose is one of best dosimetry materials. We found that fructose is one of best candidates for dosimetry due to high linearity tilt of EPR signal intensity as a function of dose, irrelevant to photon energy, constant fading value. Also, our results show that fructose materials can be applied as a radiation detector to very weak radiation doses of 0.001 Gray by using EPR at a low temperature (T = 220 K).

show abstract

Section: Methodsmentioning

confidence: 99%

Dosimetry Application of Irradiated D-fructose using the Electron Paramagnetic Resonance

Son¹,

Choi²,

Kim³

et al. 2012

Journal of Magnetics

View full text Add to dashboard Cite

show abstract

“…An unpaired electron can be created at free radicals in carbon-bound hydrogen by irradiation. Electron-nuclear double resonance (ENDOR) spectroscopy provided information about protons in the vicinity of the trapped electron [10][11][12]. In general, ENDOR spectroscopy shows that the unpaired electrons of free radicals were located in carbon-bound hydrogen [13,14].…”

Section: Methodsmentioning

confidence: 99%

The Low-Radiation Dosimetry Application of "tris" Lyoluminescence using Electron Paramagnetic Resonance at Low Temperature

Son¹,

Choi²,

Kim³

et al. 2012

Journal of Magnetics

View full text Add to dashboard Cite

We present a method for detecting very weak radiation by analyzing the inner structure of irradiated tris (lyoluminescence) materials using electron paramagnetic resonance (EPR) at low temperature. Organic materials have been looked into for use in emergency dosimetry of inhabitants around radiation accidents. However, this technology has never been applied to imperceptible radiation doses (< 0.5 Gy) because there is no proper method for detecting the change of inner structure of the subject bombed by very weak radiation at room temperature. Our results show that tris materials can be applied as a radiation detectors of very small radiation doses below 0.05 Gray, if EPR is used at low temperature (130 K ≤ T ≤ 270 K). The EPR signal intensity from the irradiated-tris sample had barely faded at all after 1 year.

show abstract

“…6.13 at Q-band. Using ENDOR at RT, Sagstuen et al were able to characterize two distinct radical types [5]. MLCFA decomposition of RT X-band powder EPR spectra in a dose series, on the other hand, revealed three dominant contributions with distinct dose responses [6].…”

Section: Final Stable Stagementioning

confidence: 99%

“…The structure of radiation-induced radicals in solid state sucrose has been studied with electron magnetic resonance (EMR) techniques since the early 1960's [1][2][3][4][5][6][7]. However, only some five years ago the identity of three radicals, dominating the room temperature (RT) stable electron paramagnetic resonance (EPR) spectrum, was convincingly established [8,9].…”

Section: Introduction and Motivation Of The Studymentioning

confidence: 99%

Radiation Chemistry of Solid-State Carbohydrates Using EMR

Vrielinck

Cooman

Callens

et al. 2014

Applications of EPR in Radiation Research

View full text Add to dashboard Cite

We review our research of the past decade towards identification of radiation-induced radicals in solid state sugars and sugar phosphates. Detailed models of the radical structures are obtained by combining EPR and ENDOR experiments with DFT calculations of g and proton HF tensors, with agreement in their anisotropy serving as most important criterion. Symmetry-related and Schonland ambiguities, which may hamper such identification, are reviewed. Thermally induced transformations of initial radiation damage into more stable radicals can also be monitored in the EPR (and ENDOR) experiments and in principle provide information on stable radical formation mechanisms. Thermal annealing experiments reveal, however, that radical recombination and/or diamagnetic radiation damage is also quite important. Analysis strategies are illustrated with research on sucrose. Results on dipotassium glucose-1-phosphate and trehalose dihydrate, fructose and sorbose are also briefly discussed. Our study demonstrates that radiation damage is strongly regio-selective and that certain general principles govern the stable radical formation.

show abstract

Free radicals in x-irradiated single crystals of sucrose: a reexamination

Cited by 42 publications

References 0 publications

Dosimetry Application of Irradiated D-fructose using the Electron Paramagnetic Resonance

Dosimetry Application of Irradiated D-fructose using the Electron Paramagnetic Resonance

The Low-Radiation Dosimetry Application of "tris" Lyoluminescence using Electron Paramagnetic Resonance at Low Temperature

Radiation Chemistry of Solid-State Carbohydrates Using EMR

Contact Info

Product

Resources

About