NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = F.F.Karpeshin Found 92 matches. 2023KA12 Phys.Rev. C 107, 045502 (2023) F.F.Karpeshin, M.B.Trzhaskovskaya Shake-off in the 164Er neutrinoless double-electron capture and the dark matter puzzle RADIOACTIVITY 164Er, 152Gd, 180W(2EC); calculated T1/2 for resonance and shake-off double-electron neutrinoless capture, matrix elements, shell contributions (2s, 2p1/2, 3d3/2 and 4f5/2) to the shake-off amplitude. Analysis of experimental capabilities to register nonresonance shake-off double-electron neutrinoless capture.
doi: 10.1103/PhysRevC.107.045502
2023KA33 JETP Lett. 118, 548 (2023) Measurement of the Energy of the 8.3-eV 229Th Isomer Using the Photoelectric Effect RADIOACTIVITY 229Th(IT); calculated the probability of the formation of the isomer on the K shell using the Feinberg–Migdal shaking theory; deduced use the photoelectric effect on inner s shells of the 229Th atom for accurate determination of the energy of its 8.3-eV isomer.
doi: 10.1134/S0021364023602890
2023KR04 JETP Lett. 117, 884 (2023) M.I.Krivoruchenko, K.S.Tyrin, F.F.Karpeshin Energy Spectrum of β Electrons in Neutrinoless Double-β Decay Including the Excitation of the Electron Shell of Atoms RADIOACTIVITY 76Ge(2β-); calculated the mean value and standard deviation of the excitation energy of the electron shell of the daughter atom using the Thomas–Fermi and relativistic Dirac–Hartree–Fock methods, β-spectra.
doi: 10.1134/S0021364023601409
2023KR11 JETP Lett. 118, 470 (2023) M.I.Krivoruchenko, K.S.Tyrin, F.F.Karpeshin Atomic Electron Shell Excitations in Double-β Decay RADIOACTIVITY 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128,130Te, 136Xe, 150Nd, 238U(2β-); analyzed available data; deduced the transition of electron shells of atoms to excited states in the process of neutrinoless double-β decay, an important role of the Feinberg-Migdal effect in the electron shell excitations.
doi: 10.1134/S0021364023602737
2022KA09 Phys.Rev. C 105, 024307 (2022) F.F.Karpeshin, M.B.Trzhaskovskaya, L.F.Vitushkin Prospects for studying the effect of electronic screening on α decay in storage rings RADIOACTIVITY 212,213,214,220,221,222,224,226Ra, 221Po, 196,197,198,199,200,201,202At, 222,223Ac, 212,219,220Rn, 213,220,221Fr(α); calculated T1/2 for bare nuclei and He-like ions. Adiabatic approach.
doi: 10.1103/PhysRevC.105.024307
2022KA55 Phys.Atomic Nuclei 85, 474 (2022) F.F.Karpeshin, M.B.Trzhaskovskaya Shakeoff Effect on the Rate of Neutrinoless Double-Electron Capture in 164Er RADIOACTIVITY 164Er(2EC); calculated probabilities for shakeoff followed by electron-shell ionization occurring; deduced removal of the resonance requirement, leading to an increase in the capture rate.
doi: 10.1134/S1063778822050064
2022KA59 Phys.Atomic Nuclei 85, 890 (2022) Hidden Variables in Angular Correlations of Fission Products NUCLEAR REACTIONS 238U(n, F), (n, n), E not given; analyzed available data; deduced angular correlations, each of the analyzed experiments may provide information that does not depend on the results of the other experiments and which is complementary to them, the situation resembles the Einstein-Podolsky-Rosen (EPR) paradox, experimental verification of the theoretical relation between the alignment and polarization of fragment spins in the CORA experiment is of crucial importance.
doi: 10.1134/S1063778823010258
2021KA18 Nucl.Phys. A1010, 122173 (2021) F.F.Karpeshin, M.B.Trzhaskovskaya A proposed solution for the lifetime puzzle of the 229mTh+ isomer RADIOACTIVITY 229Th(IT); analyzed available data; deduced dependence of the lifetime of the nuclear isomer on the ambient conditions, leveling role of the fragmentation of the single-electron levels, which makes the resonance amplification of the electron-nuclear interaction more likely, these trends lead to a probable decrease of the theoretical lifetime towards agreement with experiment.
doi: 10.1016/j.nuclphysa.2021.122173
2021KA44 Phys.Atomic Nuclei 84, 418 (2021) F.F.Karpeshin, M.B.Trzhaskovskaya Comparison of Methods for Eliminating the Bohr-Weisskopf Effect in Atomic Spectra of 209Bi Heavy Ions ATOMIC PHYSICS 209Bi; analyzed available data; deduced a relationship between hyperfine splitting in different shells for eliminating the Bohr-Weisskopf effect in hyperfine-splitting theory, refined value the magnetic moment.
doi: 10.1134/S1063778821040165
2020KA52 Phys.Atomic Nuclei 83, 608 (2020) F.F.Karpeshin, M.B.Trzhaskovskaya, L.F.Vitushkin Nonresonance Shake Mechanism in Neutrinoless Double Electron Capture RADIOACTIVITY 152Gd(2EC); calculated probability for the shake followed by electron-shell ionization occurring in the course of nucleus transformation; deduced a correction to the decay constant.
doi: 10.1134/S1063778820030126
2020KA61 Bull.Rus.Acad.Sci.Phys. 84, 1207 (2020) F.F.Karpeshin, M.B.Trzhaskovskaya, L.F.Vitushkin Electron Recombination as a Way of Deexciting the 129mSb Isomer RADIOACTIVITY 129Sb(IT), (EC); calculated Nuclear Excitation via Electron Capture (NEEC) σ, coefficient of internal conversion (ICC) for the electron shell of the nucleus in its final state, radiation width of the excited nuclear levels. Comparison with available data.
doi: 10.3103/S1062873820100135
2020KA66 Ann.Nucl.Energy 84, 1524 (2020) F.F.Karpeshin, M.B.Trzhaskovskaya The Bohr-Weisskopf Effect in the Atomic Spectra of Heavy Ions of 209Bi ATOMIC PHYSICS 209Bi; analyzed available data; calculated the nuclear moments of the spatial distribution of magnetization currents. Bohr-Weisskopf effect in the theory of hyperfine splitting (HFS)
doi: 10.3103/S1062873820120175
2020VI10 Phys.Atomic Nuclei 83, 775 (2020) L.F.Vitushkin, F.F.Karpeshin, M.B.Trzhaskovskaya Fundamental Problems in Creating a Nuclear Optical Frequency Standard on the Basis of 229Th RADIOACTIVITY 229Th(IT); analyzed available data; calculated B(E2), B(M1), radiative widths; deduced a probable solution to the thorium puzzle, the first ever observation of the dependence of the nuclear-isomer lifetime on ambient conditions, the smoothing role of single-electron levels, which renders the resonance amplification of the electron-nucleus interaction more probable.
doi: 10.1134/S1063778820050208
2019GU30 Bull.Rus.Acad.Sci.Phys. 83, 1179 (2019) Yu.I.Gusev, F.F.Karpeshin, Yu.N.Novikov, A.V.Popov Measuring the Energy of 229Th Isomer Decay
doi: 10.3103/S1062873819090089
2019KA37 Phys.Rev. C 100, 024326 (2019) F.F.Karpeshin, M.B.Trzhaskovskaya Examination of the solution to the hyperfine structure "puzzle" in H-like and Li-like 209Bi ions ATOMIC PHYSICS 209Bi; calculated hyperfine splittings of the 1s- and 2s- levels for the H-like and Li-like ions of 209Bi by the application of the surface and volume models of nuclear currents, and consideration of Bohr-Weisskopf effect. Comparison with available experimental data. Relevance to testing QED for hyperfine structure in few electron ions.
doi: 10.1103/PhysRevC.100.024326
2018KA04 Nucl.Phys. A969, 173 (2018) F.F.Karpeshin, M.B.Trzhaskovskaya Impact of the ionization of the atomic shell on the lifetime of the 229mTh isomer ATOMIC PHYSICS 229mTh; compiled recent T1/2 data for neutral atoms and charged (up to three-fold) ions; calculated ICC value in 7s electronic shell deduced radiative nuclear T1/2 with consideration of resonance conversion (bound internal conversion) and specific (leading) electron configuration. Compared to data.
doi: 10.1016/j.nuclphysa.2017.10.003
2018KA20 Phys.Atomic Nuclei 81, 1 (2018) F.F.Karpeshin, M.B.Trzhaskovskaya Anomalous Internal Conversion as a Clue to Solving the 209Bi Puzzle ATOMIC PHYSICS 209Bi; calculated hyperfine H-like and Li-like ions hyperfine splitting using specific-difference method; deduced that reported disagreement between theory and data was due to going beyond theoretical accuracy.
doi: 10.1134/S106377881801012X
2017KA09 Phys.Rev. C 95, 034310 (2017) F.F.Karpeshin, M.B.Trzhaskovskaya Bound internal conversion versus nuclear excitation by electron transition: Revision of the theory of optical pumping of the 229mTh isomer NUCLEAR REACTIONS 229Th(γ, γ')229mTh, E=few eV; calculated and analyzed differences between two mechanisms of optical pumping, nuclear excitation in the electronic transition (NEET) and bound internal conversion (BIC), two-photon optical pumping rate of the 7.6-eV nuclear isomer in singly ionized 229Th. Relevance to nuclear frequency standard and the nuclear clock, and development of new optical-nuclear technologies.
doi: 10.1103/PhysRevC.95.034310
2017KA61 Bull.Rus.Acad.Sci.Phys. 81, 1207 (2017) True ternary fission and the rotation effect
doi: 10.3103/S1062873817100161
2017RA27 Phys.Rev. C 96, 065502 (2017) S.S.Ratkevich, A.M.Gangapshev, Yu.M.Gavrilyuk, F.F.Karpeshin, V.V.Kazalov, V.V.Kuzminov, S.I.Panasenko, M.B.Trzhaskovskaya, S.P.Yakimenko Comparative study of the double-K-shell-vacancy production in single- and double-electron-capture decay RADIOACTIVITY 81Kr(EC); 78Kr(2EC); measured x rays, satellite- and hypersatellite-line photons in coincidence using pulse waveform from LPC (Large Proportional Counter) at the underground laboratory of the Baksan Neutrino Observatory (BNO); deduced double K-shell vacancy creation probability (PKK), half-life of 2ν-accompanied 2K-capture decay mode; calculated double fluorescence spectra and yields. Comparison with Z-2 dependence of PKK predicted by Primakoff and Porter.
doi: 10.1103/PhysRevC.96.065502
2015KA25 Nucl.Phys. A941, 66 (2015) F.F.Karpeshin, M.B.Trzhaskovskaya The theory of the Bohr-Weisskopf effect in the hyperfine structure NUCLEAR STRUCTURE 119Sn, 134Cs, 137Ba, 193Ir, 197Pt, 207Pb, 212Bi; calculated internal conversion coefficients for M1, M4 and E3 γ transitions, hyperfine splitting. 209Bi; calculated hyperfine splitting, Bohr-Weisskopf effect, magnetic radii for different states. Dirac-Fock with surface current and no penetration models. Compared with available data.
doi: 10.1016/j.nuclphysa.2015.06.001
2015KA36 Phys.Atomic Nuclei 78, 548 (2015); Yad.Fiz. 78, 591 (2015) Ternary fission of nuclei into comparable fragments
doi: 10.1134/S1063778815040080
2015KA42 Phys.Atomic Nuclei 78, 715 (2015); Yad.Fiz. 78, 765 (2015) F.F.Karpeshin, M.B.Trzhaskovskaya Excitation of the 229mTh nuclear isomer via resonance conversion in ionized atoms RADIOACTIVITY 229Th(IT); analyzed available data; calculated the optical pumping of the 7.6-eV nuclear isomer; deduced dominant contribution for 3.5-eV isomer, from the resonance 8s-7s transition.
doi: 10.1134/S1063778815060125
2015KA56 Phys.Atomic Nuclei 78, 933 (2015); Yad.Fiz. 78, 1055 (2015) F.F.Karpeshin, M.B.Trzhaskovskaya Experimental aspects of the adiabatic approach in estimating the effect of electron screening on alpha decay RADIOACTIVITY 144Nd, 214,226Rn, 252Cf, 241Es, 294Og(α); calculated T1/2 for bare nuclei. Comparison with available data.
doi: 10.1134/S1063778815090082
2014KA36 Bull.Rus.Acad.Sci.Phys. 78, 672 (2014); Izv.Akad.Nauk RAS, Ser.Fiz 78, 891 (2014); Erratum Bull.Rus.Acad.Sci.Phys. 78, 1162 (2014) F.F.Karpeshin, M.B.Trzhaskovskaya, C.Brandau, A.Palffy Reverse conversion in 161Dy ions as an extension of dielectronic recombination NUCLEAR REACTIONS 161Dy(E, X), E=3.8-43.8 keV; calculated reverse CE σ. Storage rings applications.
doi: 10.3103/S1062873814070156
2013KA20 Phys.Rev. C 87, 054319 (2013) Influence of electron screening on α decay RADIOACTIVITY 144Nd, 214Rn, 226Ra, 241Es, 252Cf, 294Og(α); calculated T1/2 of nuclides with and without electrons. Wave functions and energies of atoms calculated by the use of computer codes RAINE. Adiabatic quasimolecular model. Discussed effect on α-decay half-lives for the presence of a muon in the orbit in muonic atoms.
doi: 10.1103/PhysRevC.87.054319
2012KA07 Phys.Atomic Nuclei 75, 163 (2012) The muon capture in 16O: the angular and polarization correlations NUCLEAR REACTIONS 16O(μ, X)16N, E not given; calculated angular distribution of the recoil nuclei, kinematics.
doi: 10.1134/S106377881202010X
2012KA28 Bull.Rus.Acad.Sci.Phys. 76, 884 (2012); Izv.Akad.Nauk RAS, Ser.Fiz 76, 986 (2012) F.F.Karpeshin, M.B.Trzhaskovskaya, V.V.Kuzminov Fluorescence induced by double K capture RADIOACTIVITY 78Kr(2EC); calculated double fluorescense spectra, yields. Comparison with available data.
doi: 10.3103/S1062873812080187
2011GA46 Phys.Atomic Nuclei 74, 1665 (2011) Yu.P.Gangrsky, F.F.Karpeshin, M.B.Trzhaskovskaya Reaction (n, γα) assisted by internal and resonance conversion NUCLEAR REACTIONS 143Nd(n, γ), (n, αγ), E not given; calculated ICC, resonance conversion characteristic values, E1, M1 radiative transitions, P-violation effects. Comparison with experimental data.
doi: 10.1134/S1063778811070052
2010KA35 Eur.Phys.J. A 45, 251 (2010) Prompt gamma radiation from fission fragments due to the Strutinsky-Denisov polarisation NUCLEAR REACTIONS 238U(n, f), E=thermal; calculated Eγ, Iγ(θ), left-right asymmetry using Strutinsky-Denisov polarization mechanism.
doi: 10.1140/epja/i2010-10998-6
2009KA15 Eur.Phys.J. A 39, 341 (2009) F.F.Karpeshin, M.B.Trzhaskovskaya, J.Zhang Prospect of triggering the 178m2Hf isomer and the role of resonance conversion RADIOACTIVITY 178mHf(IT); calculated decay widths, ICCs, related quantities for resonance conversion; deduced enhancement in photo-induced de-excitation.
doi: 10.1140/epja/i2008-10714-3
2008GA15 Phys.Atomic Nuclei 71, 951 (2008); Yad.Fiz. 71, 979 (2008) Yu.P.Gangrsky, F.F.Karpeshin, M.B.Trzhaskovskaya, Yu.E.Penionzhkevich Effect of beta-electron capture to a bound state on delayed-neutron emission from fission fragments RADIOACTIVITY 87as, 92,95Se, 87,90,96Br, 98Kr, 99,102Rb, 104,107Sr, 138Sb, 142,146Te, 141,146Cs, 159La(β-); calculated change in decay-rate for decays to bound states and continuum.
doi: 10.1134/S106377880806001X
2008KA23 Phys.Part. and Nucl.Lett. 5, 379 (2008); Pisma Zh.Fiz.Elem.Chast.Atom.Yadra No.4 [146], 642 (2008) On neutrinoless double e capture problem
doi: 10.1134/S1547477108040080
2008KA28 Phys.Atomic Nuclei 71, 1384 (2008) F.F.Karpeshin, M.B.Trzhaskovskaya Triggering the 178m2Hf isomer via resonance conversion RADIOACTIVITY 182mHf(IT); calculated decay widths for two-photon resonance conversion; deduced enhancements in photo-induced de-excitation.
doi: 10.1134/S1063778808080073
2007KA03 J.Phys.(London) G34, 587 (2007) F.F.Karpeshin, G.La Rana, E.Vardaci, A.Brondi, R.Moro, S.N.Abramovich, V.I.Serov Resonances in alpha-nuclei interaction NUCLEAR REACTIONS 131La(α, X), E ≈ 10-15 MeV; calculated α-nucleus potential, resonance features.
doi: 10.1088/0954-3899/34/3/016
2007KA59 Phys.Rev. C 76, 054313 (2007) F.F.Karpeshin, M.B.Trzhaskovskaya Impact of the electron environment on the lifetime of the 229Thm low-lying isomer RADIOACTIVITY 229mTh(IT); calculated effect of electron shell on lifetime using multiconfiguration Dirac-Fock method.
doi: 10.1103/PhysRevC.76.054313
2006GA45 Phys.Part. and Nucl.Lett. 3, 395 (2006); Pisma Zh.Fiz.Elem.Chast.Atom.Yadra Vol. 3, No.6 [135], 90 (2006) Yu.P.Gangrsky, F.F.Karpeshin, Yu.P.Popov, M.B.Trzhaskovskaya Resonance Conversion of γ-Radiation in the Radiative Transitions between Neutron Resonances NUCLEAR REACTIONS 147Sm(n, α), E not given; analyzed Eα, resonance features.
doi: 10.1134/S1547477106060094
2006KA19 Phys.Atomic Nuclei 69, 571 (2006); Yad.Fiz. 69, 596 (2006) F.F.Karpeshin, M.B.Trzhaskovskaya Resonance Conversion as a Dominant Decay Mode for the 3.5-eV Isomer in 229mTh RADIOACTIVITY 229mTh; calculated decay probabilities for resonance conversion and direct radiative decay modes. Relativistic multiconfiguration Dirac-Fock method. NUCLEAR STRUCTURE 229mTh; calculated decay probabilities for resonance conversion and direct radiative decay modes. Relativistic multiconfiguration Dirac-Fock method.
doi: 10.1134/S106377880604003X
2006KA32 Chin.Phys.Lett. 23, 2049 (2006) F.F.Karpeshin, M.B.Trzhaskovskaya, J.-B.Zhang Resonance Conversion as the Effective Way of Triggering the 178m2Hf Isomer Energy RADIOACTIVITY 182mHf; calculated decay widths for resonance conversion; deduced enhancement in photo-induced de-excitation.
doi: 10.1088/0256-307X/23/8/024
2006KA62 Physics of Part.and Nuclei 37, 284 (2006) Resonance Internal Conversion as a Way of Accelerating Nuclear Processes
doi: 10.1134/S1063779606020055
2006KA66 Bull.Rus.Acad.Sci.Phys. 70, 867 (2006) F.F.Karpeshin, J.da Providencia Electron-ion interaction in atomic clusters in laser radiation field
2006KA67 Hyperfine Interactions 171, 255 (2006) F.F.Karpeshin, M.B.Trzhaskovskaya Testing QED with resonance conversion NUCLEAR MOMENTS 209Bi; calculated hfs for hydrogen-like ion. Other resonance conversion tests of QED discussed.
doi: 10.1007/s10751-006-9506-z
2005GA63 Bull.Rus.Acad.Sci.Phys. 69, 1857 (2005) Yu.P.Gangrsky, V.I.Zhemenik, S.G.Zemlyanoi, F.F.Karpeshin, G.V.Myshinsky, M.B.Trzhaskovskaya Search for light radiation in decay of 229Th isomer with anomalously low excitation energy NUCLEAR REACTIONS 229Th(γ, γ'), E=8.2 MeV bremsstrahlung; measured prompt and delayed Eγ, Iγ; deduced no light emission from isomer decay.
2005KA60 Hyperfine Interactions 162, 125 (2005) F.F.Karpeshin, M.B.Trzhaskovskaya Resonance Conversion as the Predominant Decay Mode of 229mTh RADIOACTIVITY 229mTh(IT); calculated resonance conversion probability, associated photon spectra. Multiconfiguration Dirac-Fock method.
doi: 10.1007/s10751-005-9213-1
2004GA56 Bull.Rus.Acad.Sci.Phys. 68, 165 (2004) Yu.P.Gangrsky, F.F.Karpeshin, M.B.Trzhaskovskaya De-excitation of nuclear levels in hydrogen-like ions through resonant internal conversion NUCLEAR STRUCTURE 169Yb; calculated resonant conversion coefficients for hydrogen-like ions.
2004KA02 J.Phys.(London) G30, 1 (2004) The complex trajectory method in muon-induced prompt fission
doi: 10.1088/0954-3899/30/2/001
2004KA14 Yad.Fiz. 67, 234 (2004); Phys.Atomic Nuclei 67, 217 (2004) F.F.Karpeshin, Yu.N.Novikov, M.B.Trzhaskovskaya Internal Conversion in Hydrogen-like Ions NUCLEAR STRUCTURE Zn, Er, Tl; calculated ICC for hydrogen-like ions.
doi: 10.1134/1.1648912
2004KA72 Bull.Rus.Acad.Sci.Phys. 68, 1278 (2004) F.F.Karpeshin, M.B.Trzhaskovskaya Correction for "shaking" to internal conversion coefficient NUCLEAR STRUCTURE Zn, Sn, Yb, U; calculated shaking-effect corrections to ICC.
2003KA28 Yad.Fiz. 66, 1209 (2003); Phys.Atomic Nuclei 66, 1173 (2003) The Complex Trajectory Method and Dissipation in Fission
doi: 10.1134/1.1586433
2003KA70 Bull.Rus.Acad.Sci.Phys. 67, 783 (2003) Method of complex trajectories in nuclear fission
2003KA72 Bull.Rus.Acad.Sci.Phys. 67, 1682 (2003) F.F.Karpeshin, M.B.Trzhaskovskaya Effect of multiple atomic ionization on γ-ray internal conversion probability NUCLEAR STRUCTURE Zn, Er, Ti; calculated internal conversion coefficients for hydrogenlike ions.
2002KA14 Phys.Rev. C65, 034303 (2002) F.F.Karpeshin, M.B.Trzhaskovskaya, M.R.Harston, J.F.Chemin Internal Conversion between Bound States and the Pauli Exclusion Principle NUCLEAR STRUCTURE 197Au; calculated conversion coefficients for Pauli-forbidden bound internal conversion.
doi: 10.1103/PhysRevC.65.034303
2002KA75 Hyperfine Interactions 143, 79 (2002) Electron Shell as a Resonator
doi: 10.1023/A:1024056828718
2002SE09 Bull.Rus.Acad.Sci.Phys. 65, 1676 (2002) V.I.Serov, S.N.Abramovich, F.F.Karpeshin Neutron Halo in Fissionable Nuclei NUCLEAR REACTIONS 233,235U(n, F), E=0-6 MeV; 235U(d, F), E ≈ 11.5 MeV; 232Th, 238U(t, F), E=8.6-13.4 MeV; 237Np(n, F), E ≈ 25-200 MeV; 232Th(p, F), E ≈ 8-22 MeV; analyzed fission σ, neutron yields; deduced possible halo state formation.
2000BA84 Bull.Rus.Acad.Sci.Phys. 64, 1 (2000) I.M.Band, M.B.Trzhaskovskaya, F.F.Karpeshin, M.A.Listengarten Fragmentation of Discrete (Subthreshold) Internal Conversion Coefficients in Multiconfigurational Calculations of Highly Charged 125Te Ions RADIOACTIVITY 125mTe(IT); calculated levels ICC, T1/2 for highly charged ion. Fragmentation of discrete internal conversion coefficients.
2000KA26 Yad.Fiz. 63, No 5, 799 (2000); Phys.Atomic Nuclei 63, 729 (2000) Born-Oppenheimer Expansion: From muon distribution to dissipation in fission
doi: 10.1134/1.855699
1999KA06 Yad.Fiz. 62, No 1, 37 (1999); Phys.Atomic Nuclei 62, 32 (1999) F.F.Karpeshin, G.Ye.Belovitsky, V.N.Baranov, O.M.Shteingrad Nonstatistical Effects in the Angular Distribution of Light Charged Particles and Fragments from Uranium Fission Induced by 153-MeV Protons NUCLEAR REACTIONS U(p, F), E=153 MeV; measured light charged particles, fission fragments angular distributions, angular correlations; deduced fission mechanism features.
1999KA47 Nucl.Phys. A654, 579 (1999) F.F.Karpeshin, I.M.Band, M.B.Trzhaskovskaya 3.5-eV Isomer of 229mTh: How it can be produced NUCLEAR REACTIONS 229Th(γ, γ')229mTh, E=low; calculated isomer excitation probability; deduced role of atomic electrons.
doi: 10.1016/S0375-9474(99)00303-6
1999KA53 Bull.Rus.Acad.Sci.Phys. 63, 30 (1999) F.F.Karpeshin, I.M.Band, M.B.Trzhaskovskaya, A.A.Pastor Role of the Electron Bridge in De-Excitation of the 3.5-eV 229Th Isomer NUCLEAR STRUCTURE 229mTh; calculated isomer γ, conversion electron relative decay probabilities. Electron Bridge.
1998KA27 Phys.Rev. C57, 3085 (1998) F.F.Karpeshin, S.Wycech, I.M.Band, M.B.Trzhaskovskaya, M.Pfutzner, J.Zylicz Rates of Transitions between the Hyperfine-Splitting Components of the Ground-State and the 3.5 eV Isomer in 229Th89+ NUCLEAR STRUCTURE 229Th; calculated nuclear spin mixing due to hyperfine interactions, transition rates in hydrogen-like ion.
doi: 10.1103/PhysRevC.57.3085
1998KA51 Bull.Rus.Acad.Sci.Phys. 62, 20 (1998) F.F.Karpeshin, M.A.Listengarten, L.I.Mileshina Calculation of the Matrix Element for 8Li β Decay within an Intermediate Coupling Model RADIOACTIVITY 8Li(β-); calculated Gamow-Teller matrix element, log ft. Intermediate coupling model.
1997KA18 Nucl.Phys. A617, 211 (1997) Angular Asymmetries in Emission of Muons from Prompt Fission Fragments
doi: 10.1016/S0375-9474(97)00035-3
1996KA07 Phys.Rev. C53, 1640 (1996) F.F.Karpeshin, M.R.Harston, F.Attallah, J.F.Chemin, J.N.Scheurer, I.M.Band, M.B.Trzhaskovskaya Subthreshold Internal Conversion to Bound States in Highly Ionized 125Te Ions NUCLEAR STRUCTURE 125Te; calculated ICC for various highly ionized charge states; deduced internal conversion decay continuity across continuum, bound final states energy threshold. New mode of decay.
doi: 10.1103/PhysRevC.53.1640
1996KA13 Phys.Lett. 372B, 1 (1996) F.F.Karpeshin, I.M.Band, M.B.Trzhaskovskaya, M.A.Listengarten Optical Pumping 229mTh Through NEET as a New Effective Way of Producing Nuclear Isomers NUCLEAR STRUCTURE 229Th; calculated nuclear excited electronic transition related features; deduced isomeric state production by optical pumping related features.
doi: 10.1016/0370-2693(96)00036-6
1995DI11 Bull.Rus.Acad.Sci.Phys. 59, 876 (1995) Collective Mechanism for Enhancing Subbarier Fusion of Heavy Ions in Synthesis of Superheavy Elements NUCLEAR REACTIONS, ICPND 64Ni(64Ni, X), E(cm) ≈ 90-105 MeV; 100Mo(64Ni, X), E(cm) ≈ 130-160 MeV; 248Cm(52Ca, X), (48Ca, X), E(cm) ≈ 190-230 MeV; 248Cm(64Fe, X), E(cm) ≈ 245-280 MeV; analyzed fusion σ(E); deduced sub-barrier fusion enhancement related features.
1995KA26 Bull.Rus.Acad.Sci.Phys. 59, 1 (1995) F.F.Karpeshin, M.A.Listengarten, S.N.Manida Effect of Laser Radiation on β-Decay
1995KA31 Nucl.Phys. A595, 209 (1995) F.F.Karpeshin, C.G.Koutroulos, M.E.Grypeos The Attachment Probability for a Λ Particle to Fragments
doi: 10.1016/0375-9474(95)00371-X
1994KA17 Yad.Fiz. 57, No 4, 594 (1994); Phys.Atomic Nuclei 57, 631 (1994) Probability of the (Lambda) Hyperon Attachment to Fission Fragments of Hypernuclei
1994KA37 Bull.Rus.Acad.Sci.Phys. 58, 41 (1994) F.F.Karpeshin, M.A.Listengarten, I.M.Band, M.B.Trzhaskovskaya Enhancement of Nuclear Electromagnetic Transitions During Resonant Interaction between Nucleus and Electron Shell in the Laser Field NUCLEAR STRUCTURE 229Th; analyzed level resonant excitation; deduced laser field induced enhancement features.
1993KA39 Bull.Rus.Acad.Sci.Phys. 57, 1673 (1993) F.F.Karpeshin, M.A.Listengarten, I.M.Band, M.B.Trzhaskovskaya Anomalous E1-Conversion and Polarization Induced Electric Moment of a Nucleus NUCLEAR STRUCTURE Z=88; calculated nucleus region contribution to subshell E1 transition conversion matrix element, ICC.
1993RO14 Z.Phys. A345, 425 (1993) C.Rosel, F.F.Karpeshin, P.David, H.Hanscheid, J.Konijn, C.T.A.M.de Laat, H.Paganetti, F.Risse, B.Sabirov, L.A.Schaller, L.Schellenberg, W.Schrieder, A.Taal Experimental Evidence for Muonic X-Rays from Fission Fragments NUCLEAR REACTIONS 238U(μ-, F), E at rest; analyzed fission fragment decay γ(X-ray)-coin data; deduced structure associated with transitions of muon attached to fragment. ATOMIC PHYSICS, Mesic-Atoms 238U(μ-, F), E at rest; analyzed fission fragment decay γ(X-ray)-coin data; deduced structure associated with transitions of muon attached to fragment.
1992DE42 Bull.Rus.Acad.Sci.Phys. 56, 108 (1992) Harmonic Scattering of Electrons and Quadrupole Moment of Nucleus NUCLEAR REACTIONS 9Be, 153Eu(e, e), E=fast; calculated relative quadrupole scattering contribution, small θ. Harmonic scattering theory, deformed, nonaxial nuclei, intrinsic quadrupole moment.
1992KA13 Yad.Fiz. 55, 29 (1992); Sov.J.Nucl.Phys. 55, 18 (1992) Study of Fission Dynamics in Muonic Atoms by Means of the Distribution of Muons between Fragments NUCLEAR STRUCTURE 238U, 237Np; analyzed fission data; deduced muonic atom fission dynamics.
1992KA18 Phys.Lett. 282B, 267 (1992) F.F.Karpeshin, I.M.Band, M.B.Trzhaskovskaya, B.A.Zon Study of 229Th Through Laser-Induced Resonance Internal Conversion NUCLEAR STRUCTURE 229Th; calculated transition acceleration factor. Laser induced resonance internal conversion.
doi: 10.1016/0370-2693(92)90636-I
1992KA40 Can.J.Phys. 70, 623 (1992) F.F.Karpeshin, M.A.Listengarten, B.A.Zon, I.M.Band, M.B.Trzhaskovskaya Stimulation of Nuclear Transitions via Resonance Conversion in Electromagnetic Fields RADIOACTIVITY 235mU(IT); calculated nuclear, electronic transition energy difference; deduced externally applied radiation frequency dependence.
doi: 10.1139/p92-099
1992KA45 Z.Phys. A344, 55 (1992) Anomalous E1 Conversion in Octupole-Deformed Nuclei and Muon Shake-Off in Prompt Fission NUCLEAR REACTIONS 238U(μ-, F), E not given; calculated muon shake-off probability for 140Xe fragment. Anomalous E1 conversion in octupole deformed nuclei.
doi: 10.1007/BF01291020
1992KA47 Yad.Fiz. 55, 2893 (1992); Sov.J.Nucl.Phys. 55, 1618 (1992) Muon Shaking as the Result of Anomalous E1 Conversion in Prompt-Fission Fragments
1991BA64 Izv.Akad.Nauk SSSR, Ser.Fiz. 55, 2135 (1991); Bull.Acad.Sci.USSR, Phys.Ser. 55, No.11, 53 (1991) I.M.Band, F.F.Karpeshin, M.A.Listengarten, M.B.Trzhaskovskaya Resonant Internal Conversion in Electron Plasma RADIOACTIVITY 235mU(IT); analyzed role of ionization in electron shells on transition matrix elements for internal conversion. Laser stimulated 235mU decay acceleration, refined Hartree-Fock calculations.
1991KA07 J.Phys.(London) G17, 705 (1991) The Microscopic Description of the Collective E1, E2 and E3 Nuclear Excitation through Radiationless Transitions in Actinoid Muonic Atoms NUCLEAR REACTIONS 238U(μ-, γ), E at rest; calculated muonic atom transition γ-multipolarity, Γγ, radiationless transition probabilities. ATOMIC PHYSICS, Mesic-Atoms 238U(μ-, γ), E at rest; calculated muonic atom transition γ-multipolarity, Γγ, radiationless transition probabilities.
doi: 10.1088/0954-3899/17/5/016
1990DE42 Izv.Akad.Nauk SSSR, Ser.Fiz. 54, 109 (1990); Bull.Acad.Sci.USSR, Phys.Ser. 54, 111 (1990) Thomas Scattering in Nuclear Reactions
1990KA23 J.Phys.(London) G16, 1195 (1990) Muonic Conversion as a Multipole Meter of γ Rays and Muon Distribution of Fragments from Prompt Nuclear Fission of U and Pu ATOMIC PHYSICS, Mesic-Atoms U, Pu; calculated muonic conversion probabilities following fission. Fission induced by radiationless transitions in mesic atoms.
doi: 10.1088/0954-3899/16/8/014
1990ZO01 Zh.Eksp.Teor.Fiz. 70, 401 (1990); Sov.Phys.JETP 70, 224 (1990) Acceleration of the Decay of 235mU by Laser-Induced Resonant Internal Conversion RADIOACTIVITY 235mU; calculated decay rate; deduced electron transition induced excitation probability. Laser radiation acceleration of transitions.
1989ZA10 Yad.Fiz. 50, 1546 (1989); Sov.J.Nucl.Phys. 50, 959 (1989) Doorway States for Fission NUCLEAR STRUCTURE 238U; calculated phonon levels fission decay widths. Doorway model.
1987KA27 Yad.Fiz. 45, 1556 (1987) F.F.Karpeshin, M.S.Kaschiev, V.A.Kaschieva The Muon Fate after Prompt Nuclear Fission in Muonic Atoms in View of a Prospect to Study Nuclear Fission Dynamics NUCLEAR REACTIONS 238U(μ-, F), E=150-200 MeV; calculated light fragment muon capture probabilites following fission. Fission dynamics.
1986BE28 Phys.Lett. 177B, 260 (1986) On the Nature of the Phase Transition in Nuclei with Neutron Number N = 88-90 NUCLEAR STRUCTURE 147,149,151,153,155Eu, 147,149,151,153,155Sm; calculated intrinsic quadrupole moments. Mottelson-Nilsson method without pairing mode.
doi: 10.1016/0370-2693(86)90749-5
1983KA05 Izv.Akad.Nauk SSSR, Ser.Fiz. 47, 188 (1983) Conversion Processes in μ-Mesic Atoms NUCLEAR STRUCTURE 90Zr, 208Pb; calculated muon conversion coefficients.
1983ZA05 Yad.Fiz. 38, 292 (1983) Polarization of Nuclei at Radiationless Excitation in Muonic Atoms ATOMIC PHYSICS, Mesic-Atoms 238U(μ, γ), E at rest; calculated nucleus polarizability in muonic atom radiationless transition.
1982KA19 Yad.Fiz. 35, 1365 (1982) F.F.Karpeshin, V.E.Starodubsky The Microscopic Description of Muonic Conversion in Magic Nuclei ATOMIC PHYSICS, Mesic-Atoms 208Pb, 90Zr; calculated ICC for muonic conversion, conversion widths for giant multipole resonance decay. RPA transition densities, Skyrme interactions.
1982KA31 Yad.Fiz. 36, 336 (1982) F.F.Karpeshin, M.S.Kaschiev, V.A.Kaschieva Distribution of Muons among the Prompt Fission Fragments from Mesoplutonium NUCLEAR REACTIONS 239Pu(μ-, F), E at rest; calculated light fission fragment muon entrainment probability.
1980KA38 Yad.Fiz. 32, 55 (1980); Sov.J.Nucl.Phys. 32, 29 (1980) Probability of Conversion in Fragments of Prompt Fission in Mesic Atoms NUCLEAR REACTIONS, Fission 236U(μ-, F), E at rest; calculated conversion γ-spectra, conversion probability for light, heavy fragments; deduced muon conversion coefficient, fragment transition γ-multipolarity.
1980ZA06 Yad.Fiz. 31, 47 (1980); Sov.J.Nucl.Phys. 31, 24 (1980) D.F.Zaretsky, F.F.Karpeshin, M.A.Listengarten, V.N.Ostrovsky Probability of Entrainment of a Muon by Prompt Fission Fragments NUCLEAR REACTIONS, Fission 236U(μ-, F), E at rest; calculated muon entrainment by light fragment. Prompt fission, radiationless transition.
1976KA35 Izv.Akad.Nauk SSSR, Ser.Fiz. 40, 1164 (1976); Bull.Acad.Sci.USSR, Phys.Ser. 40, No.6, 58 (1976) F.F.Karpeshin, I.M.Band, M.A.Listengarten, L.A.Sliv μ-Mesic Conversion of Nuclear γ-Rays NUCLEAR STRUCTURE, Mesic-Atoms 96Sr, 140Xe; calculated ICC for muonic atoms, one muon in K-shell. E1, M1, E2 transitions for Z=10, 20, 30, 40, 50, 60, 70, 80, 90.
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