E.S.R. of X-irradiated Na2SO4 doped with NaClO4

Kumaraswamy, A.; Sobhanadri, J.

doi:10.1080/00268977600103181

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…On the other hand, at the irradiation of sodium sulfate doped with perchlorate ions the SO À 4 and ClO 2À 4 radicals stable at room temperature are formed [9], while the basic paramagnetic products of radiolysis of pure anhydrous Na 2 SO 4 are SO À 4 , SO À 3 , SO À 2 and O À 3 radicals [10,11,12] having very small radiochemical yields.…”

Section: Introductionmentioning

confidence: 99%

Transformations of radicals and ions in irradiated sodium sulfate doped with nitrate ions

Bannov¹,

Nevostruev²,

Khisamov³

et al. 2003

Radiation Effects and Defects in Solids

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The structure and properties of the paramagnetic centers formed by g-irradiation at 77 K in sodium sulfate doped with nitrate ions have been investigated by the EPR method. The NO 2À 3 , NO 2 and SO À 4 radicals have been identified. The orientation of NO 2À 3 relation to crystallographic axes is determined. In the 77-400 K temperature range the transformations of observable radicals have been studied. The mechanisms of their formation and thermal annealing have been discussed. The symmetry of nitrate ions in sodium sulfate was investigated by diffuse reflectance infrared Fourier transform spectroscopy. At the concentration of NO À 3 up to 5.5 Â 10 18 g À1 the nitrate ion was supposed to have a planar or pyramidal configuration of the D 3h or C 3V symmetries. At the concentration of the dopant higher than 5.5 Â 10 18 g À1 the nitrate ions with the C 2V symmetry were observed.

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Section: Introductionmentioning

confidence: 99%

Transformations of radicals and ions in irradiated sodium sulfate doped with nitrate ions

Bannov¹,

Nevostruev²,

Khisamov³

et al. 2003

Radiation Effects and Defects in Solids

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Reply to comments on “paramagnetic centres in X‐irradiated LiNaSO₄ single crystals”

Alybakov¹,

Bujko²,

Sharsheev³

1983

Cryst. Res. Technol.

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LEHMANN (1983) commented on our "Paramagnetic Centres in X-irradiated LiNaSO, Single Crystals" (ALYBAKOV et al. 1981). We want to reply to these comments. As additional experimental data given below show, there is no error in the presentation of our experimental results.As it was noted earlier (ALYBAKOV et al. 1981), EPR spectrum of X-irradiated LiNaSO, crystal, measured at room temperature (RT) for arbitrary crystal orientations, shows 7 lines -A, -4, B, ,2, and C. Investigation of anguIar dependences at RT shows that A, -, and B1,2 lines indeed merge into one line for H 11 c. But spectrum changes gradually when cooling. Spectra, taken for two crystal orientations during the gradual cooling from RT to liquid nitrogen temperature (LNT), are shown in Figure 1. (It should be emphasized that spectra for each orientation were measured without any change of the crystal position).Spectrum, taken at RT for H 11 e, shows two lines: high-field intensive C-line and low-A3,4* Bl,.?A 1-0 + B y Fig. 1. EPR spectra of X-irradiated LiNaSO, crystal, measured at RT (l), -100 "C (2), -150 "C (3). and LNT (4)

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Part 2

Morton¹,

Preston²

Atoms, Inorganic Radicals, and Radicals in Metal Complexes

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E.S.R. of X-irradiated Na2SO4 doped with NaClO4

Cited by 5 publications

References 9 publications

Transformations of radicals and ions in irradiated sodium sulfate doped with nitrate ions

Transformations of radicals and ions in irradiated sodium sulfate doped with nitrate ions

Reply to comments on “paramagnetic centres in X‐irradiated LiNaSO₄ single crystals”

Part 2

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E.S.R. of X-irradiated Na2SO4 doped with NaClO4

Cited by 5 publications

References 9 publications

Transformations of radicals and ions in irradiated sodium sulfate doped with nitrate ions

Transformations of radicals and ions in irradiated sodium sulfate doped with nitrate ions

Reply to comments on “paramagnetic centres in X‐irradiated LiNaSO4 single crystals”

Part 2

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Reply to comments on “paramagnetic centres in X‐irradiated LiNaSO₄ single crystals”