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X-ray transient absorption spectroscopy by an ultrashort x-ray-laser pulse in a continuous-wave IR field / X. Shi, Y. Wu, J. G. Wang [et al.] // Phys. Rev. A. - 2020. - Vol. 101, Is. 2. - Ст. 023401, DOI 10.1103/PhysRevA.101.023401. - Cited References: 56. - Grants from the National Basic Research Program of China (Grant No. 2017YFA0403200), National Natural Science Foundation of China (Grants No. 11604197, No. 11934004, and No. 11974230), the Science Challenge Program of China (Grants No. TZ2018005 and No. TZ2016005), and the Organization Department of CCCPC are acknowledged. V.K. acknowledges financial support from Swedish Research Council within the State Contract of the Ministry of Education and Science of the Russian Federation for Siberian Federal University for Scientific Research in 2017-2019 (Project No. 3.2662.2017) . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
MOLECULAR NITROGEN
   TIME
   DYNAMICS
   PHASE
   SPECTRA
   DECAY
Аннотация: X-ray transient absorption spectra (XTAS) of molecules are theoretically investigated in a femtosecond x-ray pump and continuous-wave (cw) infrared (IR)-control scenario. The scheme is exemplified by a CO molecule resonantly pumped into carbon and oxygen core-excited 1s→π∗ states by a weak femtosecond x-ray pulse, while dynamic Stark shifts are induced by the cw IR-control radiation. As a result, significant shoulder structures appear in XTAS showing strong dependence on the phase of IR radiation relative to the envelope of the x-ray pulse. Due to a significant difference in the frequencies of the two pulses, the present XTAS scheme provides much clear interpretation of the dynamic Stark effects as compared to the attosecond UV transient absorption scenario. Within the suggested two-level model, where the total spectrum is decomposed as incoherent superposition of contributions from different vibrational excitations weighted by the Franck-Condon Factors, all spectral structures can be well identified and interpreted in a good agreement with the full-scale molecular simulations. Well-characterized XTAS in the proposed IR-control scheme can be applied for fine phase synchronization between IR and x-ray pulses, highly demanded in modern experiments on x-ray free-electron lasers.

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Держатели документа:
Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China.
Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China.
Peking Univ, Ctr Appl Phys & Technol, Beijing 100084, Peoples R China.
Royal Inst Technol, Theoret Chem & Biol, S-10691 Stockholm, Sweden.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Shi, Xin; Wu, Yong; Wang, Jian Guo; Kimberg, V.; Кимберг, Виктор Валерьевич; Zhang, Song Bin
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Unusual shift in the visible absorption spectrum of an active ctenophore photoprotein elucidated by time-dependent density functional theory / F. N. Tomilin, A. V. Rogova, L. P. Burakova [et al.] // Photochem. Photobiol. Sci. - 2021. - Vol. 20, Is. 4. - P. 559-570, DOI 10.1007/s43630-021-00039-5. - Cited References: 61. - The ab initio quantum chemical calculations were funded by RFBR and NSFC as the research project No. 19-54-53004 and RFBR research project No. 20-04-00085. The development of structural atomistic model of berovin without calcium ions generated by the I-TASSER server was funded by project 0721-2020-0033 of the Russian Ministry of Science and Education . - ISSN 1474-905X. - ISSN 1474-9092

РУБ Biochemistry & Molecular Biology + Biophysics + Chemistry, Physical

Аннотация: Active hydromedusan and ctenophore Ca2+-regulated photoproteins form complexes consisting of apoprotein and strongly non-covalently bound 2-hydroperoxycoelenterazine (an oxygenated intermediate of coelenterazine). Whereas the absorption maximum of hydromedusan photoproteins is at 460–470 nm, ctenophore photoproteins absorb at 437 nm. Finding out a physical reason for this blue shift is the main objective of this work, and, to achieve it, the whole structure of the protein–substrate complex was optimized using a linear scaling quantum–mechanical method. Electronic excitations pertinent to the spectra of the 2-hydroperoxy adduct of coelenterazine were simulated with time-dependent density functional theory. The dihedral angle of 60° of the 6-(p-hydroxy)-phenyl group relative to the imidazopyrazinone core of 2-hydroperoxycoelenterazine molecule was found to be the key factor determining the absorption of ctenophore photoproteins at 437 nm. The residues relevant to binding of the substrate and its adopting the particular rotation were also identified.

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Держатели документа:
Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, Kirensky Inst Phys SB RAS, Akademgorodok 50-38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny 79 Pr, Krasnoyarsk 660041, Russia.
Natl Res Tomsk State Univ, Lenin Ave 36, Tomsk 634050, Russia.
Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, Photobiol Lab, Inst Biophys SB RAS, Akademgorodok 50-50, Krasnoyarsk 660036, Russia.
Kyungpook Natl Univ, 80 Daehakro, Daegu 41566, South Korea.
Natl Inst Adv Ind Sci & Technol, Res Ctr Computat Design Adv Funct Mat CD FMat, Cent 2,Umezono 1-1-1, Tsukuba, Ibaraki 3058568, Japan.

Доп.точки доступа:
Tomilin, F. N.; Томилин, Феликс Николаевич; Rogova, A. V.; Burakova, L. P.; Tchaikovskaya, O. N.; Avramov, P. V.; Fedorov, D. G.; Vysotski, E. S.; RFBRRussian Foundation for Basic Research (RFBR) [20-04-00085]; NSFCNational Natural Science Foundation of China (NSFC) [19-54-53004]; Russian Ministry of Science and EducationMinistry of Education and Science, Russian Federation [0721-2020-0033]
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Zobov, V. E.
Tree growth parameter in the Eden model on face-centered hypercubic lattices / V. E. Zobov, M. A. Popov // Theor. Math. Phys. - 2005. - Vol. 144, Is. 3. - P. 1361-1371, DOI 10.1007/s11232-005-0165-z. - Cited References: 19 . - ISSN 0040-5779

РУБ Physics, Multidisciplinary + Physics, Mathematical
Рубрики:
BRANCHED POLYMERS
   HIGH-TEMPERATURES
   EXPANSION
   CLUSTERS
   SYSTEMS
   TIME
Кл.слова (ненормированные):
Eden model -- number of lattice trees -- Monte Carlo method -- growth parameter -- singular points of generating function -- large-dimension expansion -- face-centered hypercubic lattice -- Eden model -- Face-centered hypercubic lattice -- Growth parameter -- Large-dimension expansion -- Monte Carlo method -- Number of lattice trees -- Singular points of generating function
Аннотация: In the Eden model, we investigate how the tree growth parameter depends on the space dimension d for face-centered hypercubic lattices. We find the first three terms of the 1/d-expansion for this parameter directly from the generating function without calculating the number of trees because the growth parameter is the reciprocal coordinate of the singular point of the tree generating function. The same growth parameter was calculated by computer experiment where the ratios between the numbers of trees without intersections and trees without restrictions in the dimensions 3, 4, 6, 8, and 10 were estimated by the Monte Carlo method on face-centered cubic lattices. The results of the two methods agree well. Comparing with the previously performed computer experiment for simple hypercubic lattices, we observe that the values of the singular exponents for the tree generating functions are close for two different types of lattices.

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Держатели документа:
RAS, Siberian Branch, Kirenskii Inst Phys, Novosibirsk, Russia
Krasnoyarsk State Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, RAS, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Popov, M. A.; Зобов, Владимир Евгеньевич
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Time-resolved ellipsometric characterization of (Fe/Si)n multilayer film synthesis / I. A. Tarasov [и др.] // Donostia Int. Conf. on Nanoscaled Magnetism and Applications : Abstracts book. - 2013. - Ст. P1-27. - P. 260

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Доп.точки доступа:
Tarasov, I. A.; Тарасов, Иван Анатольевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Zharkov, S. M.; Жарков, Сергей Михайлович; Kosyrev, N. N.; Косырев, Николай Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Donostia International Conference on Nanoscaled Magnetism and Applications (9 -13 Sept. 2013 ; San Sebastian, Spain)
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Time-resolved ellipsometric characterization of (Fe/Si)n multilayer film synthesis / I. A. Tarasov [et al.] // 8th Workshop Ellipsometry : Book of abstracts. - 2014. - P. 81

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Доп.точки доступа:
Tarasov, I. A.; Тарасов, Иван Анатольевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Zharkov, S. M.; Жарков, Сергей Михайлович; Kosyrev, N. N.; Косырев, Николай Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Leibniz-Institut für Polymerforschung Dresden e. V.; Workshop Ellipsometry (8 ; 2014 ; March 10-12 ; Dresden, Germany)
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Time-optimal control of quantum dynamics of a quadrupole nucleus by NMR techniques [Text] / V. P. Shauro, V. E. Zobov // The International Conference "Micro- and nanoelectronics - 2009". - 2009. - Ст. q2-09. - P.

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Доп.точки доступа:
Shauro, V.P.; Zobov, V.E.; "Micro- and nanoelectronics", Int. Conf. (2009 ; окт. ; 1-5 ; Москва / Звенигород, Россия); "Quantum Informatics", Session(2009 ; окт. ; 1-5 ; Москва / Звенигород, Россия)
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Time-Optimal Control of Quantum Dynamics of a Quadrupole Nucleus by NMR Techniques / В. П. Шауро, В. Е. Зобов // Квантовые компьютеры и квантовые вычисления. - 2009. - Vol. 9. - С. 11-18

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Шауро, Виталий Павлович; Shauro, V.P.; Зобов, Владимир Евгеньевич; Zobov, V.E.
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Time relaxation of residual resistance of HTSC-based composites / D. A. Balaev [et al.] // Physica C-Superconductivity and its Applications. - 2007. - Т.460-462 II, spec. iss. - P. 1309-1310, DOI 10.1016/j.physc.2007.03.347 . - ISSN 0921-4534

РИНЦ
Держатели документа:
Kirensky Institute of Physics

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
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Time relaxation of residual resistance of HTSC-based composites / D. A. Balaev [et al.] // Physica C. - 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P. 1309-1310, DOI 10.1016/j.physc.2007.03.347. - Cited References: 5 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
SUPERCONDUCTORS
Кл.слова (ненормированные):
granular HTSC -- resistance -- relaxation -- magnetic flux -- Granular HTSC -- Magnetic flux -- Relaxation -- Resistance -- Copper oxides -- Crystallites -- Magnetic flux -- Magnetic relaxation -- Magnetization -- Yttrium barium copper oxides -- Anderson-like relaxation processes -- Flux trapping -- Residual resistance -- Time relaxation -- Josephson junction devices
Аннотация: Magnetoresistance curves R(H) and time relaxation of the residual resistance of bulk YBCO + CuO composites have been studied. These composites represent the network of Josephson junctions, where CuO acts as a barrier between YBCO grains. It has been shown that hysteresis of the R(H) dependences is related to the flux trapping within the YBCO crystallites. This flux induces magnetic field in the intergrain media. Time relaxation of the residual resistance is caused by relaxation of the magnetization of YBCO grains. The time dependence of the residual resistance obeys a logarithmic law, which describes the Anderson-like relaxation processes in the YBCO grains. (c) 2007 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
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10.

The effect of magnetization relaxation of superconducting grains on time evolution of the resistance of granular HTSC in constant applied magnetic field / Dubrovskiy A.A., Balaev D.A., Shaykhutdinov K.A., Popkov S.I., Petrov M.I. // 25 International conftrence on low temperature physics. - 2008. - P298

Доп.точки доступа:
Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович; International Conference on Low Temperature Physics(25 ; 2008 ; Aug. 6-13 ; Amsterdam, Netherlands)
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