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Bulletin of the Lebedev Physics Institute最新文献

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The Influence of Spin-Orbit Coupling on the Efficiency of Optical Transitions in NeAr+ Molecular Ion
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624602152
A. A. Narits
{"title":"The Influence of Spin-Orbit Coupling on the Efficiency of Optical Transitions in NeAr+ Molecular Ion","authors":"A. A. Narits","doi":"10.3103/S1068335624602152","DOIUrl":"10.3103/S1068335624602152","url":null,"abstract":"<p>Using the NeAr<sup>+</sup> weakly-bound ion as an example, we discuss the dependences of oscillator strengths of electric and magnetic dipole transitions in the weakly-bound heteronuclear rare gas ions on the spin-orbit coupling. We show that even when the spin-orbit coupling magnitude is small, its role in the optical transitions in the weakly-bound systems is not limited to line splitting. The correlation between the typical magnitude of the spin-orbit coupling energy, the splitting of the unperturbed terms and the change in the oscillator strengths of the electric and magnetic dipole transitions is demonstrated.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"550 - 555"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zonal Approach to Multidimensional Simulation of Laser–Cluster Interaction in Large Spatial Volumes
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624600803
D. A. Gozhev
{"title":"Zonal Approach to Multidimensional Simulation of Laser–Cluster Interaction in Large Spatial Volumes","authors":"D. A. Gozhev","doi":"10.3103/S1068335624600803","DOIUrl":"10.3103/S1068335624600803","url":null,"abstract":"<p>The paper presents a method that allows full-fledged resource-intensive 3D PIC simulation of the interaction of laser radiation with a large volume of cluster/droplet medium to be reduced to a series of simpler calculations by partitioning the interaction region into small zones. It is shown how normalization of the resulting spectra of accelerated ions can to used to dramatically decrease the number of necessary calculations by interpolating the obtained data.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"535 - 542"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Midwave IR Detector Based on a Photonic Crystal Resonator Combined with a Barrier-Diode InAsSb/AlSb Heterostructure
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624601572
V. S. Krivobok, M. A. Shevchenko
{"title":"A Midwave IR Detector Based on a Photonic Crystal Resonator Combined with a Barrier-Diode InAsSb/AlSb Heterostructure","authors":"V. S. Krivobok,&nbsp;M. A. Shevchenko","doi":"10.3103/S1068335624601572","DOIUrl":"10.3103/S1068335624601572","url":null,"abstract":"<p>Based on numerical simulation within the finite element method, a hybrid midwave IR photodetector is designed, in which incident electromagnetic radiation is converted into localized surface plasmons that act as an intermediary for excitation transfer to the semiconductor part of the detector. The near-field of surface plasmons allows to utilize thin InAsSb absorption layers to suppress the diffusion component of dark current and its associated noise and to increase quantum efficiency. The developed design taking into account manufacturing considerations is adapted to produce IR detectors that permit matrix format and have high detectivity at temperatures accessible for cascade Peltier elements.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"529 - 534"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of Nanoscale Electronic Properties of Undoped InAs/GaSb Superlattice by Spreading Resistance Microscopy
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624601985
D. E. Sviridov
{"title":"Investigation of Nanoscale Electronic Properties of Undoped InAs/GaSb Superlattice by Spreading Resistance Microscopy","authors":"D. E. Sviridov","doi":"10.3103/S1068335624601985","DOIUrl":"10.3103/S1068335624601985","url":null,"abstract":"<p>Using spreading resistance microscopy (SRM) under atmospheric conditions, we demonstrate a stable contrast of the electrical properties on the cleaved cross-section of an undoped InAs/GaSb type-II superlattice with a period of 7.5 nm. It is shown that this contrast is a consequence of the difference in the conductivity of the InAs and GaSb layers of the superlattice. A simple and effective method is proposed for monitoring the structure and electron‒hole subsystem of InAs/GaSb superlattices used in modern IR photodetectors.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"596 - 600"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sensitivity of νGeN Experiment to Magnetic Moment of Reactor Antineutrinos
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624601675
A. D. Bystryakov, G. D. Ignatov, A. M. Konovalov, A. V. Lubashevskiy, D. V. Ponomarev, N. A. Skrobova, for the νGeN collaboration
{"title":"Sensitivity of νGeN Experiment to Magnetic Moment of Reactor Antineutrinos","authors":"A. D. Bystryakov,&nbsp;G. D. Ignatov,&nbsp;A. M. Konovalov,&nbsp;A. V. Lubashevskiy,&nbsp;D. V. Ponomarev,&nbsp;N. A. Skrobova,&nbsp;for the νGeN collaboration","doi":"10.3103/S1068335624601675","DOIUrl":"10.3103/S1068335624601675","url":null,"abstract":"<p>The νGeN experimental setup, with a low-threshold germanium spectrometer as its basic element, is deployed at Unit 3 of the Kalinin Nuclear Power Plant, at a distance of 11 m from the centre of the reactor core. The experiment aims to observe coherent elastic scattering of neutrinos off germanium nuclei, as well as to search for antineutrino electromagnetic properties. This paper presents an estimate of νGeN sensitivity to the antineutrino magnetic moment based on the 98 kg day reactor-OFF dataset. The expected limit is 5.3 × 10<sup>−11</sup> μ<sub>B</sub> at the 90% confidence level for the exposition of 198 kg day with the reactor ON and 98 kg day with the reactor OFF. The projected sensitivity for the 1100 kg day reactor-ON dataset is 2.6 × 10<sup>−11</sup> μ<sub>B</sub>.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"508 - 514"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Light Absorption and Scattering Spectra of Nanoparticles with a Bimetallic Au/Ag Core and an Outer Shell with Two J-Bands of Molecular Aggregates
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624602103
S. S. Moritaka, A. V. Mekshun, V. S. Lebedev
{"title":"Light Absorption and Scattering Spectra of Nanoparticles with a Bimetallic Au/Ag Core and an Outer Shell with Two J-Bands of Molecular Aggregates","authors":"S. S. Moritaka,&nbsp;A. V. Mekshun,&nbsp;V. S. Lebedev","doi":"10.3103/S1068335624602103","DOIUrl":"10.3103/S1068335624602103","url":null,"abstract":"<p>We report our results on light absorption and scattering cross sections of composite spherical nanoparticles with a bimetallic core and an outer shell of molecular aggregates of cyanine dyes exhibiting two excitonic resonances. Calculations have been performed within the framework of the extended Mie theory by taking into account the frequency-dependent and size-dependent dielectric functions of gold and silver. It is shown that for such three-layer particles, a specific regime of strong plasmon-exciton coupling is achieved, when the induced transparency effect is manifested simultaneously at two different wavelengths. The spectral distance between two identified dips of induced transparency turns out to be 150 nm.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"543 - 549"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structure of the Current at Electric Explosion of Thin Conductors
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624601912
A. G. Mozgovoy, A. V. Oginov, I. N. Tilikin, K. V. Shpakov
{"title":"Structure of the Current at Electric Explosion of Thin Conductors","authors":"A. G. Mozgovoy,&nbsp;A. V. Oginov,&nbsp;I. N. Tilikin,&nbsp;K. V. Shpakov","doi":"10.3103/S1068335624601912","DOIUrl":"10.3103/S1068335624601912","url":null,"abstract":"<p>The results of experiments on measuring the magnetic field from the azimuthal component of the current during the explosion of thin wires in high-current generators are presented. The discharge was excited by high-voltage pulses of 20 kV, 500 ns, with current up to 8 kA. Laser, X-ray tenegrams from other similar experiments are given. An assumption is made that the appearance of strata in such discharges is caused by the appearance of the spiral component of the current in the discharge, which leads to the splitting of the plasma column of the discharge into strata under the action of the Ampere forces between the resulting current coils.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"562 - 567"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Current Solitons in a Nonlinear Transmission Line
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S106833562460195X
F. M. Trukhachev, N. V. Gerasimenko, M. M. Vasiliev, O. F. Petrov
{"title":"Current Solitons in a Nonlinear Transmission Line","authors":"F. M. Trukhachev,&nbsp;N. V. Gerasimenko,&nbsp;M. M. Vasiliev,&nbsp;O. F. Petrov","doi":"10.3103/S106833562460195X","DOIUrl":"10.3103/S106833562460195X","url":null,"abstract":"<p>Electric currents arising in a nonlinear transmission line during the propagation of an electromagnetic KdV soliton are analyzed. An analytical expression for calculating the current soliton is obtained. It is shown that it has a classical profile, which in the approximation of small amplitudes is described by the soliton solution of the KdV equation. The voltage profiles between the ends of a section of one of the line conductors are also calculated; they are shown to have the form of symmetric bipolar pulses.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"576 - 582"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Galactic Center Gamma-Ray Excess As Imprint of Dark Matter
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624602000
V. V. Burdyuzha
{"title":"Galactic Center Gamma-Ray Excess As Imprint of Dark Matter","authors":"V. V. Burdyuzha","doi":"10.3103/S1068335624602000","DOIUrl":"10.3103/S1068335624602000","url":null,"abstract":"<p>Probably, annihilation of atoms from magnetic monopoles (2.4 GeV) and their transitions in the Lyman series (1.8, 2.1, and 2.25 GeV) could result in a gamma-ray excess in our galactic center, which was observed by the Fermi observatory. Monopoles of GeV energies can form in the magnetospheres of magnetars and be blown out of them. At the galactic scale, atoms from magnetic monopoles (<i>g</i><sup>+</sup><i>g</i><sup>‒</sup>) are part of dark matter.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"500 - 502"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectral Luminescent Method for Determining the Degree of Milk Pasteurization
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-02 DOI: 10.3103/S1068335624602012
S. E. Dimitrieva, A. N. Lobanov, L. L. Chaikov, S. V. Krivokhizha
{"title":"Spectral Luminescent Method for Determining the Degree of Milk Pasteurization","authors":"S. E. Dimitrieva,&nbsp;A. N. Lobanov,&nbsp;L. L. Chaikov,&nbsp;S. V. Krivokhizha","doi":"10.3103/S1068335624602012","DOIUrl":"10.3103/S1068335624602012","url":null,"abstract":"<p>We propose a simple noncontact spectral method for determining the presence or absence of milk pasteurization. The method is based on the pasteurization temperature dependence of luminescence spectra of milk excited by ultraviolet radiation in the wavelength range of 300‒420 nm.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 12","pages":"607 - 611"},"PeriodicalIF":0.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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