Reconciling Anomalously Fast Heating Rate in Ion Tracks with Low Electron-Phonon Coupling

Mapping Intimacies ◽

10.21203/rs.3.rs-871443/v1 ◽

2021 ◽

Author(s):

Nikita Medvedev ◽

Alexander E. Volkov

Keyword(s):

Energy Transfer ◽

Energy Exchange ◽

Energy Surface ◽

Heavy Ion ◽

Phonon Coupling ◽

Fast Heating ◽

Ion Tracks ◽

Swift Heavy Ion ◽

Electron Phonon Coupling ◽

Electrons And Ions

Abstract Formation of swift heavy ion tracks requires extremely fast energy transfer between excited electrons and a lattice. However, electron-phonon energy exchange is too slow, as known from laser-irradiation experiments and calculations. We resolve this contradiction noticing that electron-phonon coupling is not the sole mechanism of energy exchange between electrons and ions: heating of electrons also alters potential energy surface of atoms, accelerating them and increasing their kinetic energy.

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Heating of metals in swift heavy ion tracks by electron–ion energy exchange

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/s0168-583x(98)00454-6 ◽

1998 ◽

Vol 146 (1-4) ◽

pp. 137-141 ◽

Cited By ~ 44

Author(s):

A.E. Volkov ◽

V.A. Borodin

Keyword(s):

Energy Exchange ◽

Heavy Ion ◽

Ion Energy ◽

Ion Tracks ◽

Swift Heavy Ion

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Multi-scale Investigation of Heterogeneous Swift Heavy Ion Tracks in Stannate Pyrochlore

Journal of Materials Chemistry A ◽

10.1039/d1ta04924k ◽

2021 ◽

Author(s):

Eric O'Quinn ◽

Cameron Tracy ◽

William F. Cureton ◽

Ritesh Sachan ◽

Joerg C. Neuefeind ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Heavy Ion ◽

X Ray Diffraction ◽

X Ray ◽

Structural Modifications ◽

Multi Scale ◽

Ion Tracks ◽

Swift Heavy Ion ◽

Transmission Electron

Er2Sn2O7 pyrochlore was irradiated with swift heavy Au ions (2.2 GeV), and the induced structural modifications were systematically examined using complementary characterization techniques including transmission electron microscopy (TEM), X-ray diffraction...

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Structural analysis of simulated swift heavy ion tracks in quartz

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/j.nimb.2013.10.075 ◽

2014 ◽

Vol 326 ◽

pp. 289-292 ◽

Cited By ~ 13

Author(s):

Aleksi A. Leino ◽

Szymon L. Daraszewicz ◽

Olli H. Pakarinen ◽

Flyura Djurabekova ◽

Kai Nordlund ◽

...

Keyword(s):

Structural Analysis ◽

Heavy Ion ◽

Ion Tracks ◽

Swift Heavy Ion

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Electron-phonon Coupling in the 4T2g Excited Electron State of Cs2GeF6:Mn4+

Zeitschrift für Naturforschung A ◽

10.1515/zna-2005-1-209 ◽

2005 ◽

Vol 60 (1-2) ◽

pp. 54-60

Author(s):

N. M. Avram ◽

M. G. Brika

Keyword(s):

Energy Surface ◽

Normal Modes ◽

Coupling Constants ◽

Octahedral Complex ◽

Phonon Coupling ◽

Orbit Splitting ◽

Spin Orbit Splitting ◽

Electron Phonon Coupling ◽

Jahn Teller ◽

Jahn Teller Effect

In the present paper we report on an analysis of the fine structure of the first excited quartet 4T2g of Mn4+ ions which occupy the octahedral site in the Cs2GeF6 host crystal. The dynamic 4T2g⊗(eg+t2g) Jahn-Teller effect is considered in details, including the Ham effect of the reduction of the spin-orbit splitting and displacements of the ligands due to the combined effect of the a1g and eg normal modes of the [MnF6]2− octahedral complex. The electron-phonon coupling constants are evaluated using the experimental spectroscopic data. The value of the Jahn-Teller stabilization energy EJT = 438 cm−1 for the considered complex is estimated from both the Ham effect and the potential energy surface of the 4T2g excited state.

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The role of melting temperature and electron-phonon coupling in the formation of clustered vacancy defects from heavy ion generated displacement cascades in Cu-Ni alloys

Scripta Metallurgica et Materialia ◽

10.1016/0956-716x(93)90370-8 ◽

1993 ◽

Vol 28 (7) ◽

pp. 879-884 ◽

Cited By ~ 7

Author(s):

D.K Tappin ◽

I.M Robertson ◽

M.A Kirk ◽

K Smalinskas

Keyword(s):

Melting Temperature ◽

Heavy Ion ◽

Phonon Coupling ◽

Vacancy Defects ◽

Displacement Cascades ◽

Ni Alloys ◽

Electron Phonon Coupling

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Effect of spatial redistribution of valence holes on the formation of a defect halo of swift heavy-ion tracks in LiF

Physical Review B ◽

10.1103/physrevb.87.104103 ◽

2013 ◽

Vol 87 (10) ◽

Cited By ~ 24

Author(s):

N. A. Medvedev ◽

A. E. Volkov ◽

K. Schwartz ◽

C. Trautmann

Keyword(s):

Heavy Ion ◽

Ion Tracks ◽

Swift Heavy Ion ◽

Spatial Redistribution

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Characterization of swift heavy ion tracks in CaF2 by scanning force and transmission electron microscopy

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/j.nimb.2005.06.220 ◽

2005 ◽

Vol 240 (4) ◽

pp. 819-828 ◽

Cited By ~ 71

Author(s):

N. Khalfaoui ◽

C.C. Rotaru ◽

S. Bouffard ◽

M. Toulemonde ◽

J.P. Stoquert ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Heavy Ion ◽

Ion Tracks ◽

Swift Heavy Ion ◽

Transmission Electron ◽

Scanning Force

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Microstructure of Swift Heavyion Irradiated MgAl204 Spinel

MRS Proceedings ◽

10.1557/proc-540-299 ◽

1998 ◽

Vol 540 ◽

Cited By ~ 21

Author(s):

S.J. Zinkle ◽

Hj. Matzke ◽

V.A. Skuratov

Keyword(s):

Heavy Ions ◽

Room Temperature ◽

Heavy Ion ◽

Elastic Collision ◽

Plan View ◽

Volumetric Expansion ◽

Ion Tracks ◽

Swift Heavy Ion ◽

Transmission Electron ◽

Temperature Irradiation

AbstractPlan view and cross-section transmission electron microscopy was used to investigate the microstructure of magnesium aluminate spinel (MgAl2O4) following room temperature irradiation with either 430 MeV Kr, 614 MeV Xe, or 72 MeV I ions. The fluences ranged from 1×1016/m2 (single track regime) to 1×1020/m2. Destruction of the ordered spinel crystal structure on both the anion and cation sublattices was observed in the ion tracks at low fluences. At intermediate fluences, the overlapping ion tracks induced the formation of a new metastable crystalline phase. Amorphization with a volumetric expansion of ∼35% was observed in spinel irradiated with swift heavy ions (electronic stopping powers >7 keV/nm) at fluences above 1×1019/m2. These results demonstrate that swift heavy ion radiation can induce microstructural changes not achievable with conventional elastic collision irradiation at comparable temperatures.

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