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Karpeshin, F. F.

doi:10.1023/a:1024056828718

“…Furthermore, even more exotic decay modes can be searched for, like, for instance Pauli forbidden bound internal conversion (PFBIC), which is proposed by Karpeshin et al [278]. The PFBIC, see figure 69, may take place in 197 Au at ionizations with q>69+.…”

Section: Comptonmentioning

confidence: 99%

Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research

Cerjan

¹

,

Bernstein

²

,

Hopkins

³

et al. 2018

J. Phys. G: Nucl. Part. Phys.

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The generation of dynamic high energy density plasmas in the pico-to nanosecond time domain at high-energy laser facilities affords unprecedented nuclear science research possibilities. At the National Ignition Facility (NIF), the primary goal of inertial confinement fusion research has led to the synergistic development of a unique high brightness neutron source, sophisticated nuclear diagnostic instrumentation, and versatile experimental platforms. These novel experimental capabilities provide a new path to investigate nuclear processes and structural effects in the time, mass and energy density domains relevant to astrophysical phenomena in a unique terrestrial environment. Some immediate applications include neutron capture cross-section evaluation, fission fragment production, and ion energy loss measurement in

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“…It was proposed for laser excitation of 229m Th in Refs. [16,17] and has since then been discussed in various publica-tions [1, [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Generally, the IEB process is expected to result in larger nuclear excitation rates than the direct laser excitation.…”

Section: Introductionmentioning

confidence: 99%

The theory of direct laser excitation of nuclear transitions

Wense

¹

,

Bilous

²

,

Stellmer

³

et al. 2020

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A comprehensive theoretical study of direct laser excitation of a nuclear state based on the density matrix formalism is presented. The nuclear clock isomer 229m Th is discussed in detail, as it could allow for direct laser excitation using existing technology and provides the motivation for this work. The optical Bloch equations are derived for the simplest case of a pure nuclear two-level system and for the more complex cases taking into account the presence of magnetic sub-states, hyperfine-structure and Zeeman splitting in external fields. Nuclear level splitting for free atoms and ions as well as for nuclei in a solid-state environment is discussed individually. Based on the obtained equations, nuclear population transfer in the low-saturation limit is reviewed. Further, nuclear Rabi oscillations, power broadening and nuclear twophoton excitation are considered. Finally, the theory is applied to the special cases of 229m Th and 235m U, being the nuclear excited states of lowest known excitation energies. The paper aims to be a didactic review with many calculations given explicitly.

show abstract

“…It was proposed for laser excitation of 229m Th in Refs. [16,17] and has since then been discussed in various publications [18][19][20][21][22][23][24][25][26][27][28][29][30]. Generally, the IEB process is expected to result in larger nuclear excitation rates than the direct laser excitation.…”

Section: Introductionmentioning

confidence: 99%

The theory of direct laser excitation of nuclear transitions

von der Wense,

Bilous,

Seiferle

et al. 2020

Preprint

0

View full text Add to dashboard Cite

A comprehensive theoretical study of direct laser excitation of a nuclear state based on the density matrix formalism is presented. The nuclear clock isomer 229m Th is discussed in detail, as it could allow for direct laser excitation using existing technology and provides the motivation for this work. The optical Bloch equations are derived for the simplest case of a pure nuclear two-level system and for the more complex cases taking into account the presence of magnetic sub-states, hyperfine-structure and Zeeman splitting in external fields. Nuclear level splitting for free atoms and ions as well as for nuclei in a solid-state environment is discussed individually. Based on the obtained equations, nuclear population transfer in the low-saturation limit is reviewed. Further, nuclear Rabi oscillations, power broadening and nuclear twophoton excitation are considered. Finally, the theory is applied to the special cases of 229m Th and 235m U, being the nuclear excited states of lowest known excitation energies. The paper aims to be a didactic review with many calculations given explicitly.

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Cited by 26 publications

References 28 publications

Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research

Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research

The theory of direct laser excitation of nuclear transitions

The theory of direct laser excitation of nuclear transitions

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