Energy transfer in the gamma radiolysis of alkali and alkaline earth metal nitrates dispersed in sulphate and carbonate matrices

Kulkarni, S. P.; Batra, Renu; Garg, A. N.

doi:10.1080/10420159008213076

Cited by 9 publications

(2 citation statements)

References 18 publications

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“…POt-+e--+ PO:-+ hv (8) NO;+hv -+ NO;+O (9) No TL measurements could be made for these systems because of melting and decomposition upon heating.…”

Section: Energy Transfer By Additivesmentioning

confidence: 99%

Energy transfer in the gamma radiolytic decomposition of sodium and potassium nitrates dispersed in phosphate, sulfate and carbonate matrices in solid state

Joshi¹,

Garg

1994

Radiation Effects and Defects in Solids

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Gamma radiolytic decomposition of sodium and potassium nitrates dispersed in respective phosphate, sulfate and carbonate matrices has been studied over a wide absorbed dose range upto 300 kGy. Decomposition of nitrates increases with the concentration of the additive in the admixtures. G(N0;) values, calculated on the basis of electron fraction of the nitrate decreases with the absorbed dose and with the increasing concentration (or mol %) of the nitrate. Thermoluminescence (TL) and Electron Spin Resonance (ESR) studies suggest the formation of radical species which may interact with NO; causing enhancement in the decomposition process. A comparison of G-values for three additives suggests that the efficiency of the energy transfer decreases in the order PO:. > COf > SO: -and depends on the nature and the concentration of the additive as well as the nature of catiodanion.

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“…POt-+e--+ PO:-+ hv (8) NO;+hv -+ NO;+O (9) No TL measurements could be made for these systems because of melting and decomposition upon heating.…”

Section: Energy Transfer By Additivesmentioning

confidence: 99%

Energy transfer in the gamma radiolytic decomposition of sodium and potassium nitrates dispersed in phosphate, sulfate and carbonate matrices in solid state

Joshi¹,

Garg

1994

Radiation Effects and Defects in Solids

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“…14 Electron spin resonance (ESR) and thermoluminiscence (TL) measurements have shown the formation of radical species in oxyanions by the absorption of radiation. 5,7,14 The present work deals with the ,/-ray induced decomposition of sodium and potassium nitrates with respective to borates and cyanides at varying compositions and absorbed doses. In order to confirm the role of radical species in decomposition process ESR measurements have been carried out.…”

Section: Introduction* Experimentalmentioning

confidence: 99%

Enhancement in gamma-ray induced decomposition of sodium and potassium nitrates by borate and cyanide additives

Agrawal

Garg

1998

J Radioanal Nucl Chem

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Gamma radiolytic decomposition of sodium and potassium nitrates and its admixtures with respective cyanide and borate additives has been studied over a wide absorbed dose range from 675 to 500 kGy. The decomposition of nitrate increases with the nature and concentration of the additive in the admixture. The enhancement is more significant at >80 mol% of the additive. G(NO2) values, calculated on the basis of electron fraction of the nitrate salt, decrease with increasing concentration of the nitrate. ESR spectral studies suggest the formation of radical species such as BO 4 and B(~ 3 etc. in borates whereas in case of cyanide additive F H centres are produced. The radical species and colour centres so produced may then transfer their energy to nitrate and cause enhancement in decomposition. A comparison with other oxyanion additives shows that G(NO2) values decrease in the order PO 3 > B4 O2 > SO 2 > CO 2 . Similarly, the nature of the cation also affects the decomposition.

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Gamma-radiolysis of KNO3 in double sulfates in solid state

Joshi

Dhoble

Natarajan

et al. 1994

Journal of Radioanalytical and Nuclear Chemistry, Articles

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Energy transfer in the gamma radiolysis of alkali and alkaline earth metal nitrates dispersed in sulphate and carbonate matrices

Cited by 9 publications

References 18 publications

Energy transfer in the gamma radiolytic decomposition of sodium and potassium nitrates dispersed in phosphate, sulfate and carbonate matrices in solid state

Energy transfer in the gamma radiolytic decomposition of sodium and potassium nitrates dispersed in phosphate, sulfate and carbonate matrices in solid state

Enhancement in gamma-ray induced decomposition of sodium and potassium nitrates by borate and cyanide additives

Gamma-radiolysis of KNO3 in double sulfates in solid state

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