Optical Properties and Mechanism of Formation of Some<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>F</mml:mi></mml:math>-Aggregate Centers in LiF

Nahum, J.

doi:10.1103/physrev.158.814

Cited by 141 publications

(31 citation statements)

References 22 publications

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“…I n this process charged centres (FZ, F3+) are generated from neutral aggregate centres (F2, F3) and the corresponding bands (M+, R+) are observed in the absorption spectra. Schneider and Rabin [I], Nahum and Weigand [ 2 ] , and Nahum [3] have concluded that the observed bands are connected with Fi-centres. R+-bands were investigated by Stiles and Fitchen [4], and Baumann et al [5] in NaF crystals and by Farge et al [6] in LiF crystals.…”

Section: Model Of the R+-centrementioning

confidence: 99%

Theoretical Studies on the F‐Centre in Alkali Halides

Ėvarestov

Treiger

1969

Physica Status Solidi (b)

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The results of the theoretical study of I he electronic states of the R+-centre in alkali halides are reported. No empirical parameters are used in this calculation. The electronic core polarization is taken into account. The results of the calculation are in satisfactory agreement with the experimental data and can be considered as a theoretical confirmation of the F;-model of the R+-centre. B pa6o~e M~J I~~~I O T C I Ipe3ynt~a~h1 TeopeTmecKoro paccMoTpeHm a n e~~p o r r -HOB CTpymyphi R+ UeHTpa R uenoworanonzHbx KpneTannax. Hmamie 3~nl1-pwecmie napaMeTpbr B pacseTe IIe ~c n o n i~i y m~c~~. YVsaTbIsaercR s n e~~p o~r r a n IlOJl~~l43aIWIJI HOHOB OCTOBa. Pe3YJIbTaTbI PaCveTa y~OBJIeTBOpHTe~bI10 COrJlaCyIOTCH C 3IiC~ePHMelITaJ1hIIhIMIl AaHHbIMH H MorYT paCCMaTpnBaThCH HBK TeOpeTH9ecKoe IIoATBepXHeHHe F:-ivoaenm R ' -l i e~~p a . Model of the R+-CentreUnder X-ray irradiation and exposure to light of appropriate frequency the F-aggregate centres in alkali halides can be ionized. I n this process charged centres (FZ, F3+) are generated from neutral aggregate centres (F2, F3) All these results give support for choosing as model of the Rf-centre a n aggregate of three adjacent negative-ion vacancies with two electrons localized on them.which the transition t>akes place ;

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Section: Model Of the R+-centrementioning

confidence: 99%

Theoretical Studies on the F‐Centre in Alkali Halides

Ėvarestov

Treiger

1969

Physica Status Solidi (b)

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“…Although we did not measure how long the stable laser oscillation continues if we never change the conditions of laser action, we obtained the laser oscillation without a significant decrease in power until we stop the pumping after about 2 hours. The 930 nm laser emission is confirmed to arise from the F+2 centers, because the F2 luminescence has a peak at 910 nm and a half width of about 200 nm at room temperature [5,9]. The laser output power increases with the pumping power as shown in Fig.…”

Section: Laser Oscillationmentioning

confidence: 80%

“…The second harmonic 532 nm radiation from the YΑG:Nd3+ laser can be used for the photoionization of the F2 centers. The Ft absorption band has a peak at about 630 nm and a half-width of about 160 nm [9]. Its absorption band tail extends to 532 nm.…”

Section: Formation Of Ft Centersmentioning

confidence: 99%

Stable LiF:F₂⁺Color Center Laser Oscillation at Room Temperature

Tsuboi

1998

Acta Phys. Pol. A

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An LiF:F+2 color center laser using a two-mirror cavity is reported. The LiF:F+2 laser was achieved by creating the F+2 centers through the photoionization of the F2 color centers at room temperature and simultaneously by exciting the F+2 centers optically. We obtained the F+2 broadband laser oscillation with a peak at 930 nm, and it was more powerful than the room-temperature broadband LiF:F+3 color center laser.

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“…Therefore, under electron pulse F 2 center creation is described by the reaction: ns does not depend on temperature [7], T f T and as temperature grows, it decreases and equals 5.10 -3 s at 300K [2]). …”

Section: -2mentioning

confidence: 99%

Radiation accumulation of F2 color centers in LiF crystal

Лисицына

2016

AIP Conference Proceedings

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Abstract. The paper presents the results of the research of the F 2 centers accumulation dose dependences in the LiF crystals, the kinetics of absorption relaxation initiated by exposure to a single electron pulse in the band maxima of different electron centers obtained by time-resolved spectrometry with nanosecond resolution. An analytical description of the F 2 center accumulation in an absorbed dose range ≤10 3 Gy is provided.

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Optical Properties and Mechanism of Formation of SomeF-Aggregate Centers in LiF

Cited by 141 publications

References 22 publications

Theoretical Studies on the F‐Centre in Alkali Halides

Theoretical Studies on the F‐Centre in Alkali Halides

Stable LiF:F₂⁺Color Center Laser Oscillation at Room Temperature

Radiation accumulation of F2 color centers in LiF crystal

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Optical Properties and Mechanism of Formation of SomeF-Aggregate Centers in LiF

Cited by 141 publications

References 22 publications

Theoretical Studies on the F‐Centre in Alkali Halides

Theoretical Studies on the F‐Centre in Alkali Halides

Stable LiF:F2+Color Center Laser Oscillation at Room Temperature

Radiation accumulation of F2 color centers in LiF crystal

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Stable LiF:F₂⁺Color Center Laser Oscillation at Room Temperature