Nuclear excitation by laser-assisted electronic transitions

The direct interaction of super-intense laser fields in the optical frequency domain with nuclei is studied. As main observable, we consider the nuclear AC-Stark shift of low-lying nuclear states due to the off-resonant excitation by the laser field. We include the case of accelerated nuclei to be able to control the frequency and the intensity of the laser field in the nuclear rest frame over a wide range of parameters. We find that AC-Stark shifts of the same order as in typical quantum optical systems relative to the respective transition frequencies are feasible with state-of-the-art or near-future laser field intensities and moderate acceleration of the target nuclei. Along with this shift, we find laser-induced modifications to the proton root-mean-square radii and to the proton density distribution. We thus expect direct laser-nucleus interaction to become of relevance together with other super-intense light-matter interaction processes such as pair creation.

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“…The same expression is obtained in a time-averaged calculation in the adiabatic limit [41]. In the following, we use expression Eq.…”

Section: Stark Shiftmentioning

confidence: 95%

Dynamic nuclear Stark shift in superintense laser fields

2006

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“…Because the probability increases in the first-order case only linearly with intensity, the second-order (in the laser field) process was chosen in [69] since its probability has a quadratic increase and it is not small in absolute value. Use of a resonant laser field is crucial since in the laser free case the deexcitation of the 3 2 + nuclear state with excitation of the electron states given above has only a very small probability (∼ 5 · 10 −13 ) [69]. Fig.…”

Section: Deexcitation Of Isomeric State By Eb Mechanismmentioning

confidence: 99%

“…In the paper [69] several examples ( 161 Dy, 189 Os, 193 Ir, 197 Au, 235 U, 237 Np) are considered from the point of view of the IEB mechanism leading to the excitation of nuclei. The paper considers the laser intensity up to 10 24 W cm 2 .…”

Section: Deexcitation Of Isomeric State By Eb Mechanismmentioning

confidence: 99%

“…Typical values for the important quantity E 2 int vary for different atoms in the range (10 −10 − 10 −12 ) eV 2 . In the already mentioned recent paper [69] this quantity was calculated for several nuclei on the basis of the adiabatic description of the dressed electronic states in the laser field. The values obtained there for E 2 int coincide within one order of magnitude with the results of [71,72].…”

Section: Pumping Isomers By Laser Resonancementioning

confidence: 99%

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Lasers as a bridge between atomic and nuclear physics

Matinyan

1998

Physics Reports

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This paper reviews the application of optical and UV laser radiation to several topics in low-energy nuclear physics. We consider the laser-induced nuclear anti-Stokes transitions, the laser-assisted and the laser-induced internal conversion, and the Electron Bridge and Inverse Electron Bridge mechanisms as tools for deexciting and exciting of low-lying nuclear isomeric states. A study of the anomalous, by low-lying, nuclear isomeric states (on an example of the 229 Th nucleus) is presented in detail.

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“…Such processes can already occur in the absence of any laser field but may be modified in a characteristic manner when a laser field is present. Corresponding studies have been conducted on laserassisted internal conversion [10] and laser-assisted nuclear excitation by electron transition [6,11]. Related studies have treated laser-triggered nuclear Coulomb excitation in atoms (see [12,13,14,15] and references therein) and laser-driven proton streaking [16].…”

Section: Introductionmentioning

confidence: 99%

Photo-proton emission from halo nuclei in the presence of a linearly polarized laser field

Dadi

Müller

2013

J. Phys.: Conf. Ser.

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Abstract. We investigate the emission of protons from halo nuclei which are subject to the combined electromagnetic fields of a γ-ray photon and an intense laser beam of linear polarization. Photo-proton energy spectra resulting from this laser-assisted nuclear photoeffect are calculated within an S-matrix approach based on the strong-field approximation. We analyze the influence of the applied γ-ray energy, laser field polarization and nuclear isotope on the proton emission spectra. The process represents an example from the field of laser-assisted photo-nuclear physics which may be explored at the upcoming Extreme Light Infrastructure.

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Nuclear excitation by laser-assisted electronic transitions

Cited by 20 publications

References 37 publications

Dynamic nuclear Stark shift in superintense laser fields

Dynamic nuclear Stark shift in superintense laser fields

Lasers as a bridge between atomic and nuclear physics

Photo-proton emission from halo nuclei in the presence of a linearly polarized laser field

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