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20 results on '"Yudin, Gennady"'

1. Adaptation of the Modified Adiabatic Approximation to Strong Field Ionization

Author

Bondar, Denys I., Liu, Wing-Ki, and Yudin, Gennady L.

Subjects
Physics - Atomic Physics, Physics - Optics
Abstract

Savichev's modified adiabatic approximation [Sov. Phys. JETP 73, 803 (1991)] is used to obtain a general form of a quantum-mechanical amplitude of ionization by a low-frequency laser field. The method possesses only one requirement that the frequency of the laser field must be low. Connections of the obtained result with the quasi-classical approximation and other previous investigations are discussed., Comment: 4 pages

Published
2009
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2. Photoelectron spectra in strong-field ionization by a high frequency field

Author

Bondar, Denys I., Spanner, Michael, Liu, Wing-Ki, and Yudin, Gennady L.

Subjects
Physics - Atomic Physics, Physics - Optics
Abstract

We analyze atomic photoelectron momentum distributions induced by bichromatic and monochromatic laser fields within the strong field approximation (SFA), separable Coulomb-Volkov approximation (SCVA), and ab initio treatment. We focus on the high frequency regime -- the smallest frequency used is larger than the ionization potential of the atom. We observe a remarkable agreement between the ab initio and velocity gauge SFA results while the velocity gauge SCVA fails to agree. Reasons of such a failure are discussed., Comment: Completely rewritten paper. Ionization by a two-color field is added

Published
2008
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6. Application of Fluorescence Spectroscopy for Assesment of Myocardial Ischemic Injury

Author

V Yudin Gennady, V Salmin Vladimir, A Malinovskaya Nataliya, S Provorov Alexander, V Frolova Olga, A Fursov Alexander, B Salmina Alla, Zykova Larissa D, and I Laletin Dmitry

Subjects
medicine.medical_specialty, business.industry, Internal medicine, Cardiology, Medicine, Ischemic injury, General Agricultural and Biological Sciences, business, General Biochemistry, Genetics and Molecular Biology, Fluorescence spectroscopy, General Environmental Science
Published
2011

7. Application of Fluorescence Spectroscopy for Assesment of Myocardial Ischemic Injury

Author

Salmin, Vladimir V., Salmina, Alla B., Fursov, Alexander A., Frolova, Olga V., Laletin, Dmitry I., Fursov, Maxim A., Yudin, Gennady V., Malinovskaya, Nataliya A., Zykova, Larissa D., and Provorov, Alexander S.

Subjects
ишемия, optical biopsy, myocardium, флуоресценция, миокард, ischemia, nitrogen laser, оптическая биопсия
Abstract

Представлены результаты экспериментального исследования возможности применения лазерно-флуоресцентного анализа миокарда для оценки повреждения, индуцированного ишемией в условиях кардиохирургического вмешательства. Доказано, что метод оптической биопсии с использованием азотного лазера (337 нм) позволяет регистрировать метаболические изменения в миокарде, проявляющиеся нарушением уровня пиридиновых нуклеотидов, изменением функции гемопротеидов, активности НАД(Ф)Н-утилизирующих процессов и развитием контрактуры и гибели кардиомиоцитов. Data of experimental assessment of a possibility to use laser-fluorescent analysis of myocardium for detecting alterations caused by ischemia under the conditions of cardiac surgery are presented. It is confirmed that the method of optical biopsy with Nitrogen laser (337 nm) allows registering metabolic changes in myocardium associated with alterations in pyridine nucleotides concentrations, dysfunction of hemoproteids, changes in the activity of NAD(P)H-utilizing enzymes, and development of contraction and death of cardiomyocytes.

Published
2011

9. Attosecond SPIDER

Author

Quere, F., Itatani, J., Yudin, Gennady, and Corkum, Paul

Published
2002

16. ATTOSECOND CONTROL OF ELECTRONS - THE BASIS OF ATTOSECOND SCIENCE.

Author

Dubowski, Jan J., Tanev, Stoyan, BANDRAUK, ANDRÉ D., CHELKOWSKI, SZCZEPAN, and YUDIN, GENNADY L.

Abstract

Numerical solutions of the time-dependent Schrödinger equation for a 1D model non-Born-Oppenheimer 2+H are used to illustrate the nonlinear nonperturbative response of molecules to intense [ABSTRACT FROM AUTHOR]

Published
2006
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