Mössbauer Study of Interactions between Radiation Defects and Iron Impurity Atoms in Neutron Irradiated Molybdenum

Zhetbaev, A. K.; Ibragimov, Sh. Sh.; Shokanov, A. K.

doi:10.1007/978-3-642-81344-3_192

Cited by 1 publication

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“…These quadrupole doublets have different isomer shift relatively to the undisplaced line: δ 1 =0. 13 (3) mm/s parameters appeared in the spectra. With the irradiation doses increasing, the total intensity of the additional line increased and principal line position did not change.…”

Section: Defects Interaction With Impurity Atoms In Molybdenum Irradimentioning

confidence: 95%

“…The majority of bcc structure metals are the perspective materials in the nuclear technology and space engineering. Among them, the molybdenum and niobium are the most investigated in details [13][14][15][16][17][18]. It has been established that the point defects generated in crystal structure, after irradiation, interacted between themselves like impurity atoms.…”

Section: The Point Defects Interactions In Neutrons Irradiated Tungstmentioning

confidence: 99%

See 1 more Smart Citation

Mössbauer Spectroscopy of Radiation — Induced Processes in Metallic Systems

Mukashev¹,

Shokanov²,

Umarov³

2015

New Trends in Alloy Development, Characterization and Application

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Nuclear power engineering development is held back by both the nuclear reactor safety reasons and the problems related to creating materials suitable for using in the reactors. These materials must be resistant to radiation, able to stand high temperatures, and stable to the corrosive environments. In this work, the general regularity of the interstitial atoms and vacancy interaction with impurity substitutional atoms of 57 Co(57 Fe) in bcc lattice metals has been systematically investigated for the first time. The electron states and structure of "impurity-interstitial" atom, "impurity-vacancy" systems, and their mössbauer parameters are defined. For the first time, by the Mössbauer effect study, the complexes annealing stages from isochronal annealing temperature have been defined. The mössbauer imputity atoms vibrations rms amplitude values and their binding energy are determined. It has been experimentally established that atom mobility considerably increases in radiation-damaged zones created by high-velocity charged particles, fission fragments, or ionized displaced atoms. The compound dumbbell state in bcc metals was investigated, and it was shown that unlike fcc metals, in the bcc metals the considerable quadrupole splitting was revealed, which enables us to separate them on different interstitial configurations around 57 Co impurity. It was also established that non-cubic charge distribution around a mössbauer atom leads to the electric field gradient that causes the nuclear levels hyperfine splitting owing to quadrupole interaction.

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Section: Defects Interaction With Impurity Atoms In Molybdenum Irradimentioning

confidence: 95%