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Two-Photon Mechanism of the Excitation of Exciton States in Noble Gas Cryocrystals.

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Title: Two-Photon Mechanism of the Excitation of Exciton States in Noble Gas Cryocrystals.
Authors: Myzin, D. A.1 (AUTHOR) DAMyzin@mephi.ru, Borisyuk, P. V.1 (AUTHOR), Gubskii, K. L.1 (AUTHOR), Didenko, N. V.2 (AUTHOR), Korneev, F. A.1 (AUTHOR), Kuznetsov, A. P.1 (AUTHOR), Lebedinskii, Yu. Yu.1,3 (AUTHOR), Nauryzbaev, Zh. M.1 (AUTHOR), Popruzhenko, S. V.1 (AUTHOR), Tkalya, E. V.1,4,5 (AUTHOR), Chubunova, E. V.1 (AUTHOR), Shilov, V. A.1 (AUTHOR)
Source: JETP Letters. Oct2025, Vol. 122 Issue 8, p480-485. 6p.
Subjects: Krypton, Two-photon absorbing materials, Solid rare gases, Photoluminescence, Thorium, Exciton theory, Laser beams, Nuclear excitation
Abstract: The results of an experiment on the two-photon excitation of exciton states in krypton cryocrystals by the fifth harmonic of 209-nm laser radiation have been presented. It has been shown that the two-photon excitation mechanism allows reaching a density of 1016 cm−3 of free excitons with an excitation energy of ~8.4 eV at a focal radiation intensity of W/cm2. The observed broad photoluminescence line arising from the relaxation of excited exciton states covers the low-energy nuclear isomeric transition in 229Th. Analytical estimates showing that two-photon laser generation of exciton states in noble gas crystals can be used as a new method for the excitation of the nuclear isomeric state of thorium at a pump intensity of ~1011 W/cm2 have been provided. [ABSTRACT FROM AUTHOR]
Copyright of JETP Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Two-Photon Mechanism of the Excitation of Exciton States in Noble Gas Cryocrystals.
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  Data: The results of an experiment on the two-photon excitation of exciton states in krypton cryocrystals by the fifth harmonic of 209-nm laser radiation have been presented. It has been shown that the two-photon excitation mechanism allows reaching a density of 1016 cm−3 of free excitons with an excitation energy of ~8.4 eV at a focal radiation intensity of W/cm2. The observed broad photoluminescence line arising from the relaxation of excited exciton states covers the low-energy nuclear isomeric transition in 229Th. Analytical estimates showing that two-photon laser generation of exciton states in noble gas crystals can be used as a new method for the excitation of the nuclear isomeric state of thorium at a pump intensity of ~1011 W/cm2 have been provided. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of JETP Letters is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S002136402560853X
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 480
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      – SubjectFull: Krypton
        Type: general
      – SubjectFull: Two-photon absorbing materials
        Type: general
      – SubjectFull: Solid rare gases
        Type: general
      – SubjectFull: Photoluminescence
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      – SubjectFull: Thorium
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      – SubjectFull: Exciton theory
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      – SubjectFull: Laser beams
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      – SubjectFull: Nuclear excitation
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