Primary Radiolytic Reactions in the Auger Blob Formed by Radioactive Transformation of 57Co\text{}^{57}Co into 57Fe\text{}^{57}Fe in Frozen Aqueous Medium

The emission of the Auger electrons during the formation of the Mössbauer nucleus $\text{}^{57}Fe$ leads not only to the formation of multicharged $\text{}^{57}Fe^{n+}$ ion, but also to the appearance of the Auger blob, a cloud of several hundreds of ion-electron pairs ($H_2O^{+}$, e¯) in the solvent around the Fe ion. Fast radiation-chemical reactions therein determine the experimentally observable ratio of the yields of final chemically stable charged states of the Mössbauer ions ($Fe^{3+}$ and $Fe^{2+}$). This ratio strongly depends on reaction rates constants between $H_2O^{+}$, e¯, and the solute S. We have shown that in contrast to radiation chemical data the reactivity of $NO_{3}^{-}$ anions with quasi-free track electrons in frozen aqueous solutions exceeds those of $H_{3}O^{+}$, $ClO_{4}^{-}$, and $HSO_{4}^{-}$ ions only by a factor of three instead of ≈ 100 which follows from the radiation chemical experiments

Primary Chemical Reactions Induced by Transformation of Radioactive Nuclei in Solids at Low Temperatures. Investigation by Means of the Emission Mössbauer and Positron Spectroscopies

A set of early chemical reactions in grapes of ionization (blobs) arising in tracks of fast electrons and positrons in liquids as well as formed by the Auger electrons in frozen aqueous media around decaying Mössbauer $\text{}^{57}$Co or $\text{}^{119m}$Sn nuclei is suggested. The mechanism predicts a correlated variation of the formation probabilities of intrablob final products, namely Fe$\text{}^{2+}$-Fe$\text{}^{3+}$ or Sn$\text{}^{2+}$-Sn$\text{}^{4+}$ ions, positronium atom and molecular hydrogen with variation of temperature, degree of crystallinity, concentration of electron scavengers. These correlations indicate on similarity of chemical processes as in blobs created by $\text{}^{57}$Co and $\text{}^{119m}$Sn after their decay as well as in blobs produced in tracks of fast positrons and electrons

Primary Chemical Reactions Induced by Transformation of Radioactive Nuclei in Solids at Low Temperatures. Investigation by Means of the Emission Mössbauer and Positron Spectroscopies

A set of early chemical reactions in grapes of ionization (blobs) arising in tracks of fast electrons and positrons in liquids as well as formed by the Auger electrons in frozen aqueous media around decaying Mössbauer $\text{}^{57}$Co or $\text{}^{119m}$Sn nuclei is suggested. The mechanism predicts a correlated variation of the formation probabilities of intrablob final products, namely Fe$\text{}^{2+}$-Fe$\text{}^{3+}$ or Sn$\text{}^{2+}$-Sn$\text{}^{4+}$ ions, positronium atom and molecular hydrogen with variation of temperature, degree of crystallinity, concentration of electron scavengers. These correlations indicate on similarity of chemical processes as in blobs created by $\text{}^{57}$Co and $\text{}^{119m}$Sn after their decay as well as in blobs produced in tracks of fast positrons and electrons