Published December 1975 | Version v1
Miscellaneous Open

Chemical effects of (n,2n) reactions on iodate and periodates systems

Creators

Description

The chemical consequences of (n,2n) reactions on cristalline sodium iodate and periodates were investigated measuring the initial yield and the post irradiation thermal annealing yields (900C) of the separated fractions I-, IO3- and IO4-. NaIO3, NaIO3.H2O and NaIO4, Na4H2IO6, Na4I2O9.3H2O containing 127I and 129I, or both, were irradiated with 14 MeV neutrons. Results obtained show different effects for each system and that 126I and 128I isotopes keep the same behaviour in the irradiated compounds containing only α127I or 129I and in compounds having both 127I and 129I. Neither isotope effect nor qualitative differences on thermal annealing at 900C were observed. The annealed fractions in the three studied periodates were IO-3 and IO-4. These results differ from the ones reported previously for (n,γ) reactions on the same compounds

Availability note (English)

MF available from INIS under the Report Number.

Abstract (Portuguese)

Os efeitos quimicos de reacoes (n,2n) em iodatos e periodatos de sodio cristalinos foram investigados medindo-se os rendimentos iniciais e os rendimentos em 'annealing' isotermico pos-irradiacao (900C) das fracoes separadas I-,IO3- e IO4-. NaIO3, NaIO3.H2O e NaIO4, Na3H2IO6, Na4I2O9.3H2O contendo 127I ou 129I, ou ambos, foram irradiados com neutrons de 14 MeV. Os resultados obtidos mostram diferentes efeitos em cada sistema estudado e que os isotopos 126I e 128I mantem o mesmo comportamento nos compostos irradiados contendo isoladamente 127I ou 129I, assim como em compostos contendo conjuntamente 127I e 129I. Nao se observou efeito isotopico nem diferencas qualitativas no 'annealing' isotermico a 900C. No 'annealing' as fracoes incrementadas nos tres periodatos estudados foram IO3- e IO4-. Estes resultados sao diferentes dos encontrados anteriormente em reacoes (n,γ) para os mesmos compostos

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Additional details

Additional titles

Original title (Portuguese)
Efeitos quimicos de reacoes (n,3n) em sistemas iodato e periodato

Publishing Information

Imprint Pagination
75 p.
Report number
INIS-mf--4119

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
9365028
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
ANNEALING; CHEMICAL RADIATION EFFECTS; IODATES; IODINE 126; IODINE 127; IODINE 128; IODINE 129; MEV RANGE 10-100; NEUTRON REACTIONS; NUCLEAR REACTION YIELD; PERIODATES; RECOILS; SODIUM COMPOUNDS
Descriptors DEC
ALKALI METAL COMPOUNDS; BARYON REACTIONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; ENERGY RANGE; HADRON REACTIONS; HALOGEN COMPOUNDS; HEAT TREATMENTS; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTO; IODINE COMPOUNDS; IODINE ISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MEV RANGE; MINUTES LIVING RADIOISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; OXYGEN COMPOUNDS; RADIATION EFFECTS; RADIOISOTOPES; STABLE ISOTOPES; YEARS LIVING RADIOISOTOPES