Reaction-rate theory with account of the crystal anharmonicity

被引：51

作者：

Dubinko, V. I. ^{[1
]}

Selyshchev, P. A. ^{[2
]}

Archilla, J. F. R. ^{[3
]}

机构：

[1] NSC Kharkov Inst Phys & Technol, UA-61108 Kharkov, Ukraine

[2] Kiev Natl Taras Shevchenko Univ, UA-01033 Kiev, Ukraine

[3] Univ Seville, E-41011 Seville, Spain

来源：

PHYSICAL REVIEW E | 2011年 / 83卷 / 04期

关键词：

DISCRETE BREATHERS; IRRADIATION;

D O I：

10.1103/PhysRevE.83.041124

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Reaction rate theory in solids is modified taking into account intrinsic localized modes or discrete breathers (DBs) that can appear in crystals with sufficient anharmonicity, resulting in violation of Arrhenius' law. Large-amplitude oscillations of atoms about their equilibrium positions in the lattice cause local potentials of alternating sign, which are described in terms of time-periodic modulations of the potential barriers for chemical reactions taking place in the vicinity of DBs. The reaction rate averaged over large macroscopic volumes and times including many DBs is increased by a factor that depends on the DB statistics. The breather statistics in thermal equilibrium and in thermal spikes in solids under irradiation with swift particles is considered, and the corresponding reaction rate amplification factors are derived.

引用

页数：13

共 26 条

[1] Anomalous ion accelerated bulk diffusion of interstitial nitrogen - art. no. 065901 [J].

Abrasonis, G ;

Möller, W ;

Ma, XX .

PHYSICAL REVIEW LETTERS, 2006, 96 (06)

[2] Discrete breathers for understanding reconstructive mineral processes at low temperatures [J].

Archilla, J. F. R. ;

Cuevas, J. ;

Alba, M. D. ;

Naranjo, M. ;

Trillo, J. M. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (47) :24112-24120

[3]

Cahn R. W., 1983, PHYS METALLURGY

[4] Influence of moving breathers on vacancies migration [J].

Cuevas, J ;

Katerji, C ;

Archilla, JFR ;

Eilbeck, JC ;

Russell, FM .

PHYSICS LETTERS A, 2003, 315 (05) :364-371

[5] Irradiation hardening of reactor pressure vessel steels due to the dislocation loop evolution [J].

Dubinko, V. I. ;

Kotrechko, S. A. ;

Klepikov, V. F. .

RADIATION EFFECTS AND DEFECTS IN SOLIDS, 2009, 164 (10) :647-655

[6] Radiation-induced reduction in the void swelling [J].

Dubinko, V. I. ;

Guglya, A. G. ;

Melnichenko, E. ;

Vasilenko, R. .

JOURNAL OF NUCLEAR MATERIALS, 2009, 385 (02) :228-230

[7]

Dubinko V. I., 2009, PROBLEMS ATOMIC SCI, V94, P158

[8] Kinetics of nucleation and coarsening of colloids and voids in crystals under irradiation [J].

Dubinko, VI ;

Turkin, AA ;

Vainshtein, DI ;

de Hartog, HW .

JOURNAL OF NUCLEAR MATERIALS, 2002, 304 (2-3) :117-128

[9]

DUBINKO VI, 2007, PROBLEMS ATOMIC SCI, V90, P48

[10]

DUBINKO VI, 2009, 3 STCU

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