Photoconversion of F+ centers in neutron-irradiated MgO

M. A. Monge; R. González; J. E. Muñoz Santiuste; R. Pareja; Y. Chen; E. A. Kotomin; A. I. Popov

doi:10.1016/S0168-583X(99)00751-X

Photoconversion of F⁺ centers in neutron-irradiated MgO

M. A. Monge^*
, R. González
, J. E. Muñoz Santiuste
, R. Pareja
, Y. Chen
, E. A. Kotomin
, A. I. Popov

^*Corresponding author for this work

Laboratory of Kinetics in Self-Organizing Systems, Institute of Solid State Physics

Universidad Carlos III de Madrid
United States Department of Energy

Research output: Contribution to journal › Conference article › peer-review

45 Citations (Scopus)

Abstract

In neutron-irradiated MgO crystals, experiments and theory demonstrate that photon excitation of the positively charged anion vacancies (F⁺ centers) at 5.0 eV releases holes that are subsequently trapped at V-type centers, which are cation vacancies charge-compensated by impurities, such as Al³⁺, F^-, and OH^- ions. A photoconversion mechanism occurs very likely via electron transfer to F⁺ centers from the quasi-local states which are induced in the valence band. INDO quantum chemical simulations of F⁺ centers confirmed the appearance of two induced quasi-local states located at 1.2 and 2.0 eV below the top of the valence band.

Original language	English
Pages (from-to)	220-224
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	166
DOIs	https://doi.org/10.1016/S0168-583X(99)00751-X
Publication status	Published - 2 May 2000
Event	10th International Conference on Radiation Effects in Insulators - Jena, Ger Duration: 18 Jul 1999 → 23 Jul 1999

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title = "Photoconversion of F+ centers in neutron-irradiated MgO",

abstract = "In neutron-irradiated MgO crystals, experiments and theory demonstrate that photon excitation of the positively charged anion vacancies (F+ centers) at 5.0 eV releases holes that are subsequently trapped at V-type centers, which are cation vacancies charge-compensated by impurities, such as Al3+, F-, and OH- ions. A photoconversion mechanism occurs very likely via electron transfer to F+ centers from the quasi-local states which are induced in the valence band. INDO quantum chemical simulations of F+ centers confirmed the appearance of two induced quasi-local states located at 1.2 and 2.0 eV below the top of the valence band.",

author = "Monge, \{M. A.\} and R. Gonz{\'a}lez and \{Mu{\~n}oz Santiuste\}, \{J. E.\} and R. Pareja and Y. Chen and Kotomin, \{E. A.\} and Popov, \{A. I.\}",

year = "2000",

month = may,

day = "2",

doi = "10.1016/S0168-583X(99)00751-X",

language = "English",

volume = "166",

pages = "220--224",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

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note = "10th International Conference on Radiation Effects in Insulators ; Conference date: 18-07-1999 Through 23-07-1999",

}

TY - JOUR

T1 - Photoconversion of F+ centers in neutron-irradiated MgO

AU - Monge, M. A.

AU - González, R.

AU - Muñoz Santiuste, J. E.

AU - Pareja, R.

AU - Chen, Y.

AU - Kotomin, E. A.

AU - Popov, A. I.

PY - 2000/5/2

Y1 - 2000/5/2

N2 - In neutron-irradiated MgO crystals, experiments and theory demonstrate that photon excitation of the positively charged anion vacancies (F+ centers) at 5.0 eV releases holes that are subsequently trapped at V-type centers, which are cation vacancies charge-compensated by impurities, such as Al3+, F-, and OH- ions. A photoconversion mechanism occurs very likely via electron transfer to F+ centers from the quasi-local states which are induced in the valence band. INDO quantum chemical simulations of F+ centers confirmed the appearance of two induced quasi-local states located at 1.2 and 2.0 eV below the top of the valence band.

AB - In neutron-irradiated MgO crystals, experiments and theory demonstrate that photon excitation of the positively charged anion vacancies (F+ centers) at 5.0 eV releases holes that are subsequently trapped at V-type centers, which are cation vacancies charge-compensated by impurities, such as Al3+, F-, and OH- ions. A photoconversion mechanism occurs very likely via electron transfer to F+ centers from the quasi-local states which are induced in the valence band. INDO quantum chemical simulations of F+ centers confirmed the appearance of two induced quasi-local states located at 1.2 and 2.0 eV below the top of the valence band.

UR - https://www.scopus.com/pages/publications/0342573169

U2 - 10.1016/S0168-583X(99)00751-X

DO - 10.1016/S0168-583X(99)00751-X

M3 - Conference article

AN - SCOPUS:0342573169

SN - 0168-583X

VL - 166

SP - 220

EP - 224

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

T2 - 10th International Conference on Radiation Effects in Insulators

Y2 - 18 July 1999 through 23 July 1999

ER -

Photoconversion of F⁺ centers in neutron-irradiated MgO

Abstract

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