Absolute<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>-to-ground band transition strengths in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>154</mml:mn></mml:msup></mml:math>Sm

Möller, T.; Pietralla, N.; Rainovski, G.; Ahn, T.; Bauer, C.; Carpenter, M. P.; Coquard, L.; Janssens, R. V. F.; Leske, J.; Lister, C. J.; McCutchan, E. A.; Möller, O.; Seweryniak, D.

doi:10.1103/physrevc.86.031305

Cited by 10 publications

(7 citation statements)

References 19 publications

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“…Moreover, it is striking that, the harmonic yield in the circularly and elliptically polarized fields is comparable to or even higher than that in the linearly polarized field. These features are very different from those in gaseous media, where the harmonic yield decreases dramatically with the increase of the ellipticity and almost no high harmonic is generated at large ellipticities [36]. Apparently, the ellipticity dependence here is different from generally recognized ones.…”

contrasting

confidence: 77%

Reciprocal-Space-Trajectory Perspective on High-Harmonic Generation in Solids

et al. 2019

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We revisit the mechanism of high harmonic generation (HHG) from solids by comparing HHG in laser fields with different ellipticities but a constant maximum amplitude. It is shown that the cutoff of HHG is strongly extended in a circularly polarized field. Moreover, the harmonic yield with large ellipticity is comparable to or even higher than that in the linearly polarized field. To understand the underlying physics, we develop a reciprocal-space-trajectory method, which explains HHG in solids by a trajectory ensemble from different ionization times and different initial states in the reciprocal space. We show that the cutoff extension is related to an additional pre-acceleration step prior to ionization, which has been overlooked in solids. By analyzing the trajectories and the time-frequency spectrogram, we show that the HHG in solids cannot be interpreted in terms of the classical re-collision picture alone. Instead, the radiation should be described by the electronhole interband polarization, which leads to the unusual ellipticity dependence. We propose a new four-step model to understand the mechanism of HHG in solids.

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confidence: 77%

Reciprocal-Space-Trajectory Perspective on High-Harmonic Generation in Solids

et al. 2019

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“…Let us also attempt to describe a non-rigid rotor. The region around 152 Sm has been well studied [14,15,83], and absolute B(E2) values for some inter-band transitions in 154 Sm were measured recently [84]. For 154 Sm, the LECs related to inter-band transitions are C β ≈ 0.092 keV −1/2 (determined from the 2 + β → 2 + g transition) and C γ ≈ 0.181 keV −1/2 .…”

Section: B Comparison With Experimental Datamentioning

confidence: 99%

“…Same as Table IIIbut for 154 Sm. Theoretical results from the confined β soft (CBS) model[85], taken from Ref [84],. are also included.…”

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confidence: 99%

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Effective theory for the nonrigid rotor in an electromagnetic field: Toward accurate and precise calculations ofE2transitions in deformed nuclei

Pérez

Papenbrock

2015

Phys. Rev. C

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We present a model-independent approach to electric quadrupole transitions of deformed nuclei. Based on an effective theory for axially symmetric systems, the leading interactions with electromagnetic fields enter as minimal couplings to gauge potentials, while subleading corrections employ gauge-invariant non-minimal couplings. This approach yields transition operators that are consistent with the Hamiltonian, and the power counting of the effective theory provides us with theoretical uncertainty estimates. We successfully test the effective theory in homonuclear molecules that exhibit a large separation of scales. For ground-state band transitions of rotational nuclei, the effective theory describes data well within theoretical uncertainties at leading order. In order to probe the theory at subleading order, data with higher precision would be valuable. For transitional nuclei, next-to-leading order calculations and the high-precision data are consistent within the theoretical uncertainty estimates. We also study the faint inter-band transitions within the effective theory and focus on the E2 transitions from the 0 + 2 band (the "β band") to the ground-state band. Here, the predictions from the effective theory are consistent with data for several nuclei, thereby proposing a solution to a long-standing challenge.

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“…B(E2; Ii → I j ) values (in Weisskopf units) for 152 Nd, 154 Sm, 156 Gd, and 158 Dy. Experimental values[61,63,69] are compared to results of the pv-IBM, IBM and QPCH model calculations.…”

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confidence: 99%

Pairing vibrations in the interacting boson model based on density functional theory

Nomura,

Vretenar,

et al. 2020

Preprint

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We propose a method to incorporate the coupling between shape and pairing collective degrees of freedom in the framework of the interacting boson model (IBM), based on the nuclear density functional theory. To account for pairing vibrations, a boson-number non-conserving IBM Hamiltonian is introduced. The Hamiltonian is constructed by using solutions of self-consistent mean-field calculations based on a universal energy density functional and pairing force, with constraints on the axially-symmetric quadrupole and pairing intrinsic deformations. By mapping the resulting quadrupole-pairing potential energy surface onto the expectation value of the bosonic Hamiltonian in the boson condensate state, the strength parameters of the boson Hamiltonian are determined. An illustrative calculation is performed for 122 Xe, and the method is further explored in a more systematic study of rare-earth N = 92 isotones. The inclusion of the dynamical pairing degree of freedom significantly lowers the energies of bands based on excited 0 + states. The results are in quantitative agreement with spectroscopic data, and are consistent with those obtained using the collective Hamiltonian approach.

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Absoluteβ-to-ground band transition strengths in154Sm

Cited by 10 publications

References 19 publications

Reciprocal-Space-Trajectory Perspective on High-Harmonic Generation in Solids

Reciprocal-Space-Trajectory Perspective on High-Harmonic Generation in Solids

Effective theory for the nonrigid rotor in an electromagnetic field: Toward accurate and precise calculations ofE2transitions in deformed nuclei

Pairing vibrations in the interacting boson model based on density functional theory

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