Stabilization of recoil and dopant manganese as permanganate in potassium permanganate-potassium perchlorate mixed crystals

Owens, C.; Lecington, W.C.

doi:10.1016/0022-1902(73)80594-9

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…It justified the first order term. The increase in parent yield in mixed crystals is due to the oxidation of recoil species in the displacement spike reaction and oxidizing properties of KClO 4 [2].…”

Section: Resultsmentioning

confidence: 99%

“…Through mixed crystals studies the chemical consequences of neutron capture were understood via the intermolecular competition between the size of the reaction zone and the hot atom reactions depending on the mol-fraction of the target [2,3]. Over the years, a number of studies have been performed on the chemical behaviour of foreign ions or atoms implanted in crystals of various oxyanionic salts [1,2,4].…”

Section: Introductionmentioning

confidence: 99%

“…Over the years, a number of studies have been performed on the chemical behaviour of foreign ions or atoms implanted in crystals of various oxyanionic salts [1,2,4]. It has been inferred that doping by foreign materials or atoms of different valence states possibly changes the distribution of different recoil species as the transient reaction of metastable precursors are modified by the presence of defects in the irradiated matrix.…”

Section: Introductionmentioning

confidence: 99%

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Chemical stabilization of recoil ⁵⁶Mn in MnSO₄-KClO₄ mixed crystals following (n, γ) process

Mishra¹,

Vijaya²

2005

Radiochimica Acta

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Stabilization of recoil 56 Mn in mixed crystals of MnSO 4 -KClO 4 was studied with especial emphasis on isothermal annealing of neutron irradiated target. The results showed that * MnO 4 − yield (%) varies linearly with the increase in perchlorate concentration from 0.100 to 0.500 mol fraction, reaching a maximum value of (89.0 ± 1.1)%. However, the value of intercept (P 0 ) obtained was (63.0 ± 1.2)%. Isothermal annealing of 56 Mn in the present mixed crystal (MnSO 4 -KClO 4 ) of the two molar concentrations (i.e., 0.100 and 0.500 mol fraction) of perchlorate was studied at different temperatures for a desired length of time. The retention values increased with increasing temperature and time of annealing for both the samples. The values found for the two concentrations were (67.0 ± 1.0)% and (89.0 ± 1.1)%, respectively, at room temperature. Retention value increased gradually in the beginning but slowed down with a lapse of time and finally attained saturation within about 20 min of heating at 373 K in both cases. Limiting saturations were found to be (86.0 ± 1.0)% (max) for 0.100 molar concentration and (96.0 ± 0.8)% (max) for 0.500 molar concentration.The rate of annealing was found to increase while the extent of annealing decreased. The recoil re-entry process obeys first order rate law and the energies of activation for the system (MnSO 4 -KClO 4 ) computed from the classical Arrhenius plots were found to be 0.15 ± 0.05 eV for 0.1 molar ratio and (2.5 ± 0.06) × 10 −2 eV for 0.5 molar ratio. The low value of activation energy indicates that there is a recombination of recoil fragments and participation of defect controlled reactions in thermal annealing, leading to higher saturation retention in 0.500 molar ratio. The results obtained are discussed in the light of vacancies created by the dopant and helping in the proposed recoils stabilization mechanism.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical stabilization of recoil ⁵⁶Mn in MnSO₄-KClO₄ mixed crystals following (n, γ) process

Mishra¹,

Vijaya²

2005

Radiochimica Acta

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Reply to some comments on “Chemical effects of56Mn-recoils in mixed crystals of potassium permanganate with perchlorates”

Mishra

Singh

1987

Journal of Radioanalytical and Nuclear Chemistry Letters

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Comments on the paper of Mishra and Singh “Chemical effects of56Mn-recoils in mixed crystals of potassium permanganate with perchlorates”

Müller

1988

Journal of Radioanalytical and Nuclear Chemistry Letters

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Stabilization of recoil and dopant manganese as permanganate in potassium permanganate-potassium perchlorate mixed crystals

Cited by 7 publications

References 7 publications

Chemical stabilization of recoil ⁵⁶Mn in MnSO₄-KClO₄ mixed crystals following (n, γ) process

Chemical stabilization of recoil ⁵⁶Mn in MnSO₄-KClO₄ mixed crystals following (n, γ) process

Reply to some comments on “Chemical effects of56Mn-recoils in mixed crystals of potassium permanganate with perchlorates”

Comments on the paper of Mishra and Singh “Chemical effects of56Mn-recoils in mixed crystals of potassium permanganate with perchlorates”

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Stabilization of recoil and dopant manganese as permanganate in potassium permanganate-potassium perchlorate mixed crystals

Cited by 7 publications

References 7 publications

Chemical stabilization of recoil 56Mn in MnSO4-KClO4 mixed crystals following (n, γ) process

Chemical stabilization of recoil 56Mn in MnSO4-KClO4 mixed crystals following (n, γ) process

Reply to some comments on “Chemical effects of56Mn-recoils in mixed crystals of potassium permanganate with perchlorates”

Comments on the paper of Mishra and Singh “Chemical effects of56Mn-recoils in mixed crystals of potassium permanganate with perchlorates”

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Chemical stabilization of recoil ⁵⁶Mn in MnSO₄-KClO₄ mixed crystals following (n, γ) process

Chemical stabilization of recoil ⁵⁶Mn in MnSO₄-KClO₄ mixed crystals following (n, γ) process