Release of stored energy of X‐irradiated KCl and CsBr

Schrey, P.; Balzer, R.; Peisl, H.

doi:10.1002/pssb.2220850218

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…The a luminescence (which is excited in the a-absorption band and characterizes their concentration) is annealed in the three main [39] 0.05 [9] t1111 0.28 [40] 0.09 [42] 0.24 [40] 0.06 [33] [1111 0.13 [41] 0.11 [41] stages: at 22 K (I), 30 K (II), and 39 K (111) in KC1, whereas two main stages at 20.5 K (I) and 28 K (11) are observed in KBr [14]. These data correlate well with the a-absorption [38] and the stored energy [7] annealing measurements in X-irradiated crystals. The Table 1.…”

Section: Kci Crystalsmentioning

confidence: 74%

Computer Simulations of I‐Center Annealing in KCl and KBr Crystals. Theoretical Interpretation of Thermostimulated Experiments

Eglitis

Попов

Kotomin

1995

Physica Status Solidi (b)

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Results of computer simulations of the kinetics of correlated annealing of pairs of close a-I and F-I centers in KCI and KBr crystals, enhanced by I-center diffusion and Coulomb or elastic attractions, respectively, are presented. Special attention is paid to the conditions under which multi-stage annealing stages arise as it has been observed experimentally more than once. Our general conclusions are: (i) a weak elastic interaction affects the recombination kinetics and the survival probability even for relatively well-separated F-I pairs, the more so is true for the case of Coulomb attraction between charged a-I pairs; (ii) the multi-step (kink) structure arises only for close (typically, up to fourth-nearest neighbour) defects. To explain the strongly separated stages observed experimentally for a-I (17 to 21 K, 30 to 39 K in KCI and 18 to 22 K and 27 to 30 K in KBr) a very particular initial distribution of defects is required consisting of two groups of close and well-separated defects. It gives strong support to the results of recent computer simulations that an interstitial ion created due to electron trapping by an H center can be transformed into a crowdion which could be displaced athermally by a long distance from a vacancy (five to seven interionic distances).

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Section: Kci Crystalsmentioning

confidence: 74%

Computer Simulations of I‐Center Annealing in KCl and KBr Crystals. Theoretical Interpretation of Thermostimulated Experiments

Eglitis

Попов

Kotomin

1995

Physica Status Solidi (b)

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“…The formation energies of F-H and α-I pairs with a system Fermi energy equal to the VBM are calculated as 6.4 eV and 5.2 eV, respectively. Experiment has observed the larger presence of α-I pairs over F-H pairs at liquid helium temperature, but finds this is no longer the case at higher temperatures [58,59]. Indeed this effect has been seen in the rocksalt alkali halides such as KBr [60].…”

Section: Discussionmentioning

confidence: 99%

Structure and properties of electronic and hole centers in CsBr from theoretical calculations

Halliday¹,

Hess²,

Shluger³

2015

J. Phys.: Condens. Matter

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The electronic structure, geometry, diffusion barriers and optical properties of fundamental defects of CsBr are calculated using hybrid functional DFT and TD-DFT methods. The B3LYP functional with a modified exchange contribution has been used in an embedded cluster scheme to model the structure and spectroscopic properties of the self-trapped triplet exciton, interstitial Br atoms and ions, self-trapped holes and Br vacancies. The calculated migration barriers and positions of maxima of optical absorption bands are in good agreement with experiment, justifying the obtained defect geometries. The off-center triplet exciton luminescence energy is also accurately calculated.

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Thermalized and Hot Interstitial Halogen Ions in Alkali Halides

Lushchik

Frorip

1990

Physica Status Solidi (b)

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The efficiency of α, I pair creation at exciton decay is high at 4.2 K for KCl, KBr, and RbBr crystals for which H centers are oriented along 〈110〉. The efficiency of α, I pair creation by VUV‐irradiation at 4.2 K is extremely low for NaCl crystals for which H centers are oriented along 〈111〉. The process of mobile crowdion‐type interstitial halogen ion (I center) formation in KCl, KBr, RbCl, and RbBr (but not in NaCl) due to the tunneling recharge of primary F, H pairs is discussed. Such an I crowdion can shift by several interanion distances along [110] even at 4.2 K and, as a result, the system leaves the zone of spontaneous annihilation of α and I centers.

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Release of stored energy of X‐irradiated KCl and CsBr

Cited by 6 publications

References 15 publications

Computer Simulations of I‐Center Annealing in KCl and KBr Crystals. Theoretical Interpretation of Thermostimulated Experiments

Computer Simulations of I‐Center Annealing in KCl and KBr Crystals. Theoretical Interpretation of Thermostimulated Experiments

Structure and properties of electronic and hole centers in CsBr from theoretical calculations

Thermalized and Hot Interstitial Halogen Ions in Alkali Halides

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