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NSR database version of April 11, 2024.

Search: Author = A.Palffy

Found 32 matches.

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2023JI06      Phys. Rev. Res. 5, 023134 (2023)

J.Jin, H.Bekker, T.Kirschbaum, Y.A.Litvinov, A.Palffy, J.Sommerfeldt, A.Surzhykov, P.G.Thirolf, D.Budker

Excitation and probing of low-energy nuclear states at high-energy storage rings

RADIOACTIVITY 229Th(IT); analyzed available data; deduced electric dipole transitions changing both the electronic and nuclear states that are opened by the nuclear hyperfine mixing, and using them for efficient isomer excitation in Li-like 229Th ions, via stimulated Raman adiabatic passage or single-laser excitation.

doi: 10.1103/PhysRevResearch.5.023134
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2023PA10      Nature(London) 617, 678 (2023)


Photon lights a path towards a nuclear clock

doi: 10.1038/d41586-023-01631-8
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2022CH46      Phys. Rev. Res. 4, L032007 (2022)

Y.-H.Chen, P.-H.Lin, G.-Y.Wang, A.Palffy, W.-T.Liao

Transient nuclear inversion by x-ray free electron laser in a tapered x-ray waveguide

NUCLEAR REACTIONS 169Tm, 187Os, 133Ba, 57Fe(γ, X), E<15 keV; calculated Lamb-Mossbauer factors, the reduced nuclear transition probability B(M1), the internal conversion coefficient and the spontaneous radiative rates.

doi: 10.1103/PhysRevResearch.4.L032007
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2022KI13      Phys.Rev. C 105, 064313 (2022)

T.Kirschbaum, N.Minkov, A.Palffy

Nuclear coherent population transfer to the 229mTh isomer using x-ray pulses

NUCLEAR REACTIONS 229Th(γ, γ'), E=29.19 keV; calculated transfer rate to 229mTe 8 eV state population from second excited state (29.19 keV) populated by coherent x-ray pulses. 229Th; calculated B(M1), B(E2), radiative transition rates, branching ratios, radiative and total decay width. Investigated the efficiency of nuclear coherent population transfer (NCPT) from the ground state to the isomeric state via two quantum optical transfer schemes: Stimulated Raman adiabatic passage (STIRAP) and use of two subsequent π pulses. Discussed possibility of experimental studies at XFEL facilities. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.064313
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2022WU10      Phys.Rev.Lett. 128, 162501 (2022)

Y.Wu, S.Gargiulo, F.Carbone, C.H.Keitel, A.Palffy

Dynamical Control of Nuclear Isomer Depletion via Electron Vortex Beams

doi: 10.1103/PhysRevLett.128.162501
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2021KO13      Phys.Rev. C 103, 044616 (2021)

S.Kobzak, H.A.Weidenmuller, A.Palffy

Laser-nucleus interactions in the sudden regime

doi: 10.1103/PhysRevC.103.044616
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2021MI03      Phys.Rev. C 103, 014313 (2021)

N.Minkov, A.Palffy

229mTh isomer from a nuclear model perspective

NUCLEAR STRUCTURE 229,229mTh; calculated β2 versus β3 plots as function of K values for the g.s. and isomer state single particle orbitals and the respective average parities, single-particle and quasiparticle energy of the 3/2+ isomer orbital with respect to the 5/2+ g.s. orbital, B(M1) and B(E2) for the isomeric transition, magnetic moments for the g.s. and the isomer. Quadrupole-octupole (QO) vibration-rotation core plus particle model with Woods-Saxon deformed shell model (DSM) quadrupole and octupole deformations. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.014313
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2020BI05      Phys.Rev.Lett. 124, 192502 (2020)

P.V.Bilous, H.Bekker, J.C.Berengut, B.Seiferle, L.V.D.Wense, P.G.Thirolf, T.Pfeifer, J.R.C.Lopez-Urrutia, A.Palffy

Electronic Bridge Excitation in Highly Charged 229Th Ions

NUCLEAR REACTIONS Th(γ, X)229mTh, E<10 eV; calculated low-lying electronic energy levels in Th, nuclear EB excitation rate in the EBIT, Zeeman splitting and Doppler broadening of the absorbed photon energy.

doi: 10.1103/physrevlett.124.192502
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2020NI02      Phys.Rev.Lett. 125, 032501 (2020)

B.S.Nickerson, M.Pimon, P.V.Bilous, J.Gugler, K.Beeks, T.Sikorsky, P.Mohn, T.Schumm, A.Palffy

Nuclear Excitation of the 229Th Isomer via Defect States in Doped Crystals

RADIOACTIVITY 229Th(IT); calculated electronic bridge excitation rates involving stimulated emission or absorption using an optical laser.

doi: 10.1103/PhysRevLett.125.032501
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2020PA09      Phys.Rev. C 101, 034619 (2020)

A.Palffy, P.-G.Reinhard, H.Weidenmuller

Rate for laser-induced nuclear dipole absorption

doi: 10.1103/PhysRevC.101.034619
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2020PA16      Phys.Rev.Lett. 124, 212505 (2020)

A.Palffy, S.V.Popruzhenko

Can Extreme Electromagnetic Fields Accelerate the α Decay of Nuclei?

RADIOACTIVITY 106Te, 144Nd, 162W, 212Po, 238Pu, 238U(α); calculated T1/2, parameters using Wentzel-Kramers-Brillouin approximation in the framework of the α decay precluster model.

doi: 10.1103/PhysRevLett.124.212505
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2020VO09      Eur.Phys.J. A 56, 176 (2020)

L.von der Wense, P.V.Bilous, B.Seiferle, S.Stellmer, J.Weitenberg, P.G.Thirolf, A.Palffy, G.Kazakov

The theory of direct laser excitation of nuclear transitions

doi: 10.1140/epja/s10050-020-00177-x
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2019MI05      Phys.Rev.Lett. 122, 162502 (2019)

N.Minkov, A.Palffy

Theoretical Predictions for the Magnetic Dipole Moment of 229mTh

NUCLEAR MOMENTS 229Th; calculated isomeric state nuclear magnetic moments. Comparison with available data.

doi: 10.1103/PhysRevLett.122.162502
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2019SE13      Nature(London) 573, 243 (2019)

B.Seiferle, L.von der Wense, P.V.Bilous, I.Amersdorffer, C.Lemell, F.Libisch, S.Stellmer, T.Schumm, C.E.Dullmann, A.Palffy, P.G.Thirolf

Energy of the 229Th nuclear clock transition

RADIOACTIVITY 229Th(IT); measured decay products, Eγ, Iγ; deduced transition energy of this isomeric state to the ground state with an uncertainty of 0.17 electronvolts (one standard deviation) using spectroscopy of the internal conversion electrons emitted in flight during the decay of neutral 229mTh atoms.

doi: 10.1038/s41586-019-1533-4
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2019WU06      Phys.Rev.Lett. 122, 212501 (2019)

Y.Wu, C.H.Keitel, A.Palffy

93mMo Isomer Depletion via Beam-Based Nuclear Excitation by Electron Capture

RADIOACTIVITY 93Mo(IT) [from 7Li(90Zr, X)93Mo, E not given]; calculated nuclear excitation by electron capture (NEEC) excitation rates; deduced disagreement with the experimental data by approximately 9 orders of magnitude.

doi: 10.1103/PhysRevLett.122.212501
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2018BI05      Phys.Rev. C 97, 044320 (2018)

P.V.Bilous, N.Minkov, A.Palffy

Electric quadrupole channel of the 7.8 eV 229Th transition

RADIOACTIVITY 229Th(IT); calculated B(M1), B(E2) for 7.8-eV γ transition from 229mTh to the g.s. for internal conversion (IC) and electronic bridging (EB) modes in neutral and partially ionized atoms involving 7s, 7p1/2, 7p3/2 6d3/2, 6d5/2, 5f5/2 and 5f7/2 atomic orbitals; deduced dominance of E2 channel in IC or EB multipole mixing for 7p, 6d, and 5f atomic orbitals. Dirac-Hartree-Fock (DHF) and random-phase approximation (RPA) method. Comparison with other theoretical results.

doi: 10.1103/PhysRevC.97.044320
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2018WU01      Phys.Rev.Lett. 120, 052504 (2018)

Y.Wu, J.Gunst, C.H.Keitel, A.Palffy

Tailoring Laser-Generated Plasmas for Efficient Nuclear Excitation by Electron Capture

RADIOACTIVITY 93Mo(IT); analyzed available data; calculated nuclear excitation by electron capture (NEEC) rates, laser parameters, electron density, temperature.

doi: 10.1103/PhysRevLett.120.052504
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2017BI04      Phys.Rev. A 95, 032503 (2017)

P.V.Bilous, G.A.Kazakov, I.D.Moore, T.Schumm, A.Palffy

Internal conversion from excited electronic states of 229Th ions

NUCLEAR STRUCTURE 229Th; calculated internal conversion coefficients, lifetimes of the excited electronic states, internal conversion rates. Comparison with available data.

doi: 10.1103/PhysRevA.95.032503
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2017MI07      Phys.Rev.Lett. 118, 212501 (2017)

N.Minkov, A.Palffy

Reduced Transition Probabilities for the Gamma Decay of the 7.8 eV Isomer in 229Th

RADIOACTIVITY 229Th(IT); calculated the reduced magnetic dipole, electric quadrupole transition probabilities for the radiative decay of the 7.8 eV isomer to the ground state.

doi: 10.1103/PhysRevLett.118.212501
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2017VO08      Phys.Rev.Lett. 119, 132503 (2017)

L.von der Wense, B.Seiferle, S.Stellmer, J.Weitenberg, G.Kazakov, A.Palffy, P.G.Thirolf

A Laser Excitation Scheme for 229mTh

RADIOACTIVITY 229Th(IT); analyzed available data; deduced direct laser excitation scheme.

doi: 10.1103/physrevlett.119.132503
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2015PA43      Phys.Rev. C 92, 044619 (2015)

A.Palffy, O.Buss, A.Hoefer, H.A.Weidenmuller

Laser-nucleus interactions: The quasi-adiabatic regime

doi: 10.1103/PhysRevC.92.044619
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2014GU07      Phys.Rev.Lett. 112, 082501 (2014)

J.Gunst, Y.A.Litvinov, C.H.Keitel, A.Palffy

Dominant Secondary Nuclear Photoexcitation with the X-Ray Free-Electron Laser

RADIOACTIVITY 93Mo(IT) [from 93Nb(p, n)93mMo, E not given]; calculated contribution of the secondary processes coupling nuclei to the atomic shell; deduced dominance of the secondary processes over direct photoexcitation. Comparison with available data.

doi: 10.1103/PhysRevLett.112.082501
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2014HE14      Phys.Rev. C 90, 015802 (2014)

S.Helmrich, K.Spenneberg, A.Palffy

Coupling highly excited nuclei to the atomic shell in dense astrophysical plasmas

NUCLEAR REACTIONS 187Os, 193Ir(n, γ), E=low; calculated σ, stellar mitigation factor (SMF) for an intermediate nuclear excitation by electron capture (NEEC) or photoabsorption (PA) step in stellar plasma environments, reaction rates. Relevance to astrophysical s-process, and 187Re - 187Os cosmochronometer.

doi: 10.1103/PhysRevC.90.015802
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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
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2014PA16      Phys.Rev.Lett. 112, 192502 (2014)

A.Palffy, H.A.Weidenmuller

Laser-Nucleus Reactions: Population of States Far above Yrast and Far from Stability

doi: 10.1103/PhysRevLett.112.192502
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2013DA11      Phys.Rev. C 88, 024601 (2013)

S.Das, A.Palffy, C.H.Keitel

Quantum interference effects in an ensemble of 229Th nuclei interacting with coherent light

NUCLEAR REACTIONS 229Th(γ, γ), E=ultraviolet region; calculated nuclear forward scattering (NFS) time spectra from a multi-level nuclear ensemble of 229Th doped in vacuum ultraviolet (VUV) transparent crystal for three- and four-level configurations interacting with one and two optical fields. Signature of the isomer excitation from quantum interference effects. Discussed design of precise experiments to determine the isomer transition energy by tuning the laser intensity and detuning. Population trapping in the isomeric state. Applications in nuclear quantum optics.

doi: 10.1103/PhysRevC.88.024601
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2013LI21      Phys.Rev. C 87, 054609 (2013)

W.-T.Liao, A.Palffy, C.H.Keitel

Three-beam setup for coherently controlling nuclear-state population

NUCLEAR REACTIONS 97Tc, 113Cd, 152Pm, 154Gd, 168Er, 172Yb, 185Re, 223Ra(γ, γ), E<1.8 MeV; calculated laser-induced coherent nuclear excitations using a collider system composed of two fully coherent XFEL beams together with an ion accelerator.

doi: 10.1103/PhysRevC.87.054609
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2013PA29      Nucl.Phys. A917, 15 (2013)

A.Palffy, H.A.Weidenmuller

Nuclear level densities at high excitation energies and for large particle numbers

doi: 10.1016/j.nuclphysa.2013.08.011
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2012LI56      Phys.Rev.Lett. 109, 262502 (2012)

W.-T.Liao, S.Das, C.H.Keitel, A.Palffy

Coherence-Enhanced Optical Determination of the 229Th Isomeric Transition

ATOMIC PHYSICS 229Th; calculated isomeric transition, time spectra, fluorescence of thorium nuclei in a crystal lattice environment. Comparison with available data.

doi: 10.1103/PhysRevLett.109.262502
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2008PA04      Phys.Lett. B 661, 330 (2008)

A.Palffy, Z.Harman, C.Kozhuharov, C.Brandau, C.H.Keitel, W.Scheid T.Stohlker

Nuclear excitation by electron capture followed by fast x-ray emission

RADIOACTIVITY 232Th, 238U(IT); calculated excited state T1/2 for nuclear excitation following electron capture for differently charged ions.

doi: 10.1016/j.physletb.2008.07.02.027
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2008PA08      Phys.Rev. C 77, 044602 (2008)

A.Palffy, J.Evers, C.H.Keitel

Electric-dipole-forbidden nuclear transitions driven by super-intense laser fields

NUCLEAR REACTIONS 83Kr, 137La, 151,153Sm, 151,153Eu, 156Gd, 161,162Dy, 165Ho, 169Tm, 173Yb, 181Ta, 187Os, 238U(γ, γ), E<12.4 keV; calculated nuclear excitation energies, B(E1), multipolarities.

doi: 10.1103/PhysRevC.77.044602
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2007PA40      Phys.Rev.Lett. 99, 172502 (2007)

A.Palffy, J.Evers, C.H.Keitel

Isomer Triggering via Nuclear Excitation by Electron Capture

RADIOACTIVITY 93Mo, 152Eu, 178Hf, 189Os, 204Pb, 235U, 242Am(IT); calculated total cross sections for nuclear excitation by electron capture.

doi: 10.1103/PhysRevLett.99.172502
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