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Roshchupkin, V. V.; Lyakhovitskii, M. M.; Pokrasin, M. A.

doi:10.1023/a:1022388907556

Cited by 7 publications

(19 citation statements)

References 1 publication

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“…Under conditions (27), (28), and also by virtue of the law of conservation of energy in the external field (3) ω i ≈ E + + E − we can get following relations:…”

Section: The Poles Of the Ppp Amplitudementioning

confidence: 99%

Resonant photoproduction of high-energy electron-positron pairs in the field of a nucleus and a weak electromagnetic wave

2019

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The resonant photoproduction of ultrarelativistic electron-positron pairs (PPP) in a nuclear field and a weak laser field is theoretically studied. Under resonance conditions, the intermediate virtual electron (positron) in the laser field becomes a real particle. As a result, the initial process of the second order in the fine structure constant in the laser field effectively reduces into two successive processes of the first order: single-photon production of electron-positron pair in a laser field (laserstimulated Breit-Wheeler process) and laser-assisted process of electron (positron) scattering on a nucleus. Resonant kinematics of PPP is studied in details. It is shown that for the considered laser intensities resonance is possible only for the initial photon energies greater than the characteristic threshold energy. At the same time, the ultrarelativistic electron and positron propagate in a narrow cone along the direction of the initial photon momentum. The resonant energy of the positron (electron) can has two values for each radiation angle which varies from zero to some maximum value determined by the energy of the initial photon and the threshold energy. Resonant differential cross section of the studied process was obtained. It is shown that the resonant differential cross section of the PPP can significantly exceed the corresponding cross section of the PPP without an external field. The project calculations may be experimentally verified by the scientific facilities of pulsed laser radiation (SLAC, FAIR, XFEL, ELI, XCELS).

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“…Under conditions (27), (28), and also by virtue of the law of conservation of energy in the external field (3) ω i ≈ E + + E − we can get following relations:…”

Section: The Poles Of the Ppp Amplitudementioning

confidence: 99%

Resonant photoproduction of high-energy electron-positron pairs in the field of a nucleus and a weak electromagnetic wave

2019

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“…The AE method was used in this study, which is a continuation of the investigations of the acoustic properties of materials [4,7,8], to investigate the dynamics of structural changes in metal materials. The AE was investigated in Armco iron and 08Kh14AN4MDB (chrome-nitrogen-nickel-molybdenum-copper-niobium) structural steel in the process of annealing and of heating from 20 to 1000 °C in the vicinity of the Curie point and α → γ phase transition.…”

Section: Methodsmentioning

confidence: 99%

An investigation of acoustic emission in Armco iron and structural steel in the process of recrystallization and phase transitions

Lyakhovitskii¹,

Pokrasin²,

Roshchupkin³

et al. 2006

High Temp

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“…As it was shown in Refs. [24,25,36], the described case is realized when an electron is scattered at a small angle: We exclude scattering on given small angles from consideration and will study resonance properties of the diagram (a) only (see, Fig. 2).…”

Section: B Resonance Conditionsmentioning

confidence: 99%

“…(63) and (64), "erf" is the error function. The function M 0 l1+s1,l2+s2 (p f , q i , φ) (20), (22)- (24) in Eq. (65), for field intensities (7), is simplified to the form:…”

Section: Amplitude Of Ensb Process At Specific Kinematicsmentioning

confidence: 99%

“…Borisov et al [23] considered resonant SB that accompanies collisions of ultrarelativistic electrons for large transferred momenta. In the general relativistic case, the problem of ENSB in the field of a plane monochromatic wave was studied by Roshchupkin [10,17,24,25]. Resonant case of ENSB in the pulsed laser field was considered in the Ref.…”

Section: Introductionmentioning

confidence: 99%

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Resonant parametric interference effect in spontaneous bremsstrahlung of an electron in the field of a nucleus and two pulsed laser waves

et al. 2018

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Resonant spontaneous bremsstrahlung of an electron scattered by a nucleus in the field of two moderately strong pulsed laser waves is studied theoretically. The process is studied in detail within the interference kinematic region. This region is determined by scattering of particles in the same plane at predetermined angles, at that stimulated absorption and emission of photons of external pulsed waves by an electron occurs in correlated manner. The correspondence between the emission angle and the final-electron energy is established in the kinematic region where the resonant parametric interference effect is manifested. The resonant differential cross section of ENSB process with simultaneous registration of both emission angles of the spontaneous photon and the scattered electron, can exceed by 4-5 orders of magnitude the corresponding cross section in the absence of an external field. It was shown for nonrelativistic electrons that the resonant cross section of ENSB in the field of two pulsed laser waves within the interference region in two order of magnitude may exceed corresponding cross section in the Bunkin-Fedorov kinematic region. The obtained results may be experimentally verified, for example, by scientific facilities at sources of pulsed laser radiation (SLAC, FAIR, XFEL, ELI).

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Cited by 7 publications

References 1 publication

Resonant photoproduction of high-energy electron-positron pairs in the field of a nucleus and a weak electromagnetic wave

Resonant photoproduction of high-energy electron-positron pairs in the field of a nucleus and a weak electromagnetic wave

An investigation of acoustic emission in Armco iron and structural steel in the process of recrystallization and phase transitions

Resonant parametric interference effect in spontaneous bremsstrahlung of an electron in the field of a nucleus and two pulsed laser waves

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