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Diffusion-controlled A+A→0 reaction of nonequilibrium states in disordered linear-chain lattice
http://hdl.handle.net/2298/9623
http://hdl.handle.net/2298/96234b7d817c-d966-4f9e-89b0-cec0c502953d
名前 / ファイル | ライセンス | アクション |
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PRB_061_3085.pdf (715.3 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2008-10-23 | |||||
タイトル | ||||||
タイトル | Diffusion-controlled A+A→0 reaction of nonequilibrium states in disordered linear-chain lattice | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | MX chain complex, MX鎖錯体, photoexcited states, 光誘起状態, kinetics, 動力学, computer simulation, コンピュータシミュレーション, survival probability, 生存確率, Torney-McConnell theory, Torney-McConnell理論, Kohlrausch law, Kohlrausch則, fractal dimension, フラクタル次元 | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
著者 |
田端, 淑矩
× 田端, 淑矩× Kuroda, Noritaka |
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別言語の著者 |
田端, 淑矩
× 田端, 淑矩× 黒田, 規敬 |
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内容記述 | ||||||
内容記述 | To investigate the kinetics of photoexcited states in MX chain compounds the diffusion-controlled irreversible reaction of A+A→0 on a disordered linear lattice is examined by numerical simulation, where A and 0 denote the photoexcited state and its annihilation, respectively. The lattice disorder is introduced by irregular energy barriers of which the height obeys a Gaussian distribution around a given value. As the irregularity evolves the survival probability S(ζ), ζ=N02Dt, of A is transformed from Torney-McConnell’s form or its modified one into the Kohlrausch form S(ζ)=exp[-(ζ/ζ1/e)β], so that S(ζ) becomes still more nonexponential, where N0, D, and t are the initial density, diffusion coefficient, and reaction time, respectively. The argument β is reduced as if the fractal dimension of the lattice is reduced from unity. Concurrently, the parameter ζ1/e increases, so that the 1/e decay time τ at a given temperature increases significantly. As long as, however, the mean height of the barriers remains unchanged, the temperature dependence of τ is not altered by the irregularity. The present results are consistent in various respects with the decay properties of long-lived solitons observed in degenerated MX chain compounds. | |||||
内容記述 | ||||||
内容記述 | 擬一次元MX鎖錯体における光誘起状態の動力学についてこれまで実験で得られた知見を検証し、さらに一層深く考究を進めるために、乱れた直鎖格子上でのA+A→0という拡散律速非可逆反応のコンピュータシミュレーションを行なった。格子の乱れのために、粒子Aが酔歩で跳び越えるエネルギー障壁の高さが不規則であるとし、その不規則度をガウス分布で導入すると、MX鎖錯体における光誘起状態の生存率曲線の温度変化、レーザ光強度依存性および試料依存性など、様々な実験的知見がシミュレーションでよく再現された。この研究より、格子の乱れによる系のフラクタル次元の低下という根本原理が様々な現象の背後にあることが初めて浮き彫りとなった。 | |||||
書誌情報 |
Physical Review B 巻 61, 号 4, p. 3085-3090, 発行年 2000-01-15 |
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ISSN | ||||||
収録物識別子 | 10980121 | |||||
書誌レコードID | ||||||
収録物識別子 | AA11187113 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
関連識別子 | 10.1103/PhysRevB.61.3085 | |||||
権利 | ||||||
権利情報 | ©2000 The American Physical Society | |||||
フォーマット | ||||||
内容記述 | application/pdf | |||||
形態 | ||||||
715276 bytes | ||||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
日本十進分類法 | ||||||
主題 | 431.5 | |||||
その他の言語のタイトル | ||||||
その他のタイトル | 乱れた直鎖格子上の非平衡状態の拡散律速A+A→0反応 | |||||
タイトル(ヨミ) | ||||||
その他のタイトル | ミダレタ チョクサ コウシジョウ ノ ヒ ヘイコウ ジョウタイ ノ カクサン リッソク A+A→0 ハンノウ | |||||
出版者 | ||||||
出版者 | The American Physical Society | |||||
資源タイプ | ||||||
内容記述 | 論文(Article) | |||||
資源タイプ・ローカル | ||||||
雑誌掲載論文 | ||||||
資源タイプ・NII | ||||||
Journal Article | ||||||
資源タイプ・DCMI | ||||||
text | ||||||
資源タイプ・ローカル表示コード | ||||||
01 | ||||||
URL | ||||||
内容記述 | http://link.aps.org/abstract/PRB/v61/p3085 | |||||
コメント | ||||||
黒田規敬: 熊本大学大学院自然科学研究科マテリアル工学講座・工学部マテリアル工学科 |