# Reduced Transition Probabilities for the Gamma Decay of the 7.8 eV Isomer in ^{229}Th.

@article{Minkov2017ReducedTP, title={Reduced Transition Probabilities for the Gamma Decay of the 7.8 eV Isomer in ^\{229\}Th.}, author={Nikolay Minkov and Adriana P{\'a}lffy}, journal={Physical review letters}, year={2017}, volume={118 21}, pages={ 212501 } }

The reduced magnetic dipole and electric quadrupole transition probabilities for the radiative decay of the ^{229}Th 7.8 eV isomer to the ground state are predicted within a detailed nuclear-structure model approach. We show that the presence and decay of this isomer can only be accounted for by the Coriolis mixing emerging from a remarkably fine interplay between the coherent quadrupole-octupole motion of the nuclear core and the single-nucleon motion within a reflection-asymmetric deformed…

## 42 Citations

Electric quadrupole channel of the 7.8 eV 229 Th transition

- Physics
- 2018

The unique isomeric transition at 7.8 eV in $~^{229}\mathrm{Th}$ has a magnetic dipole ($M1$) and an electric quadrupole ($E2$) multipole mixing. So far, the $E2$ component has been widely…

Theoretical Predictions for the Magnetic Dipole Moment of ^{229m}Th.

- PhysicsPhysical review letters
- 2019

A new theoretical prediction based on a nuclear model with coupled collective quadrupole-octupole and single-particle motions is presented, providing further information on the role and strength of the Coriolis mixing and the most probable value of the gyromagnetic ratio.

Energy of the ^{229}Th Nuclear Clock Isomer Determined by Absolute γ-ray Energy Difference.

- PhysicsPhysical review letters
- 2019

The low-lying isomeric state of ^{229}Th provides unique opportunities for high-resolution laser spectroscopy of the atomic nucleus and is determined by taking the absolute energy difference between the excitation energy required to populate the 29.2-keV state and the energy emitted in its decay to the isomersic excited state.

Extending Our Knowledge about the 229Th Nuclear Isomer

- Physics, ChemistryAtoms
- 2022

The first nuclear excited state in 229Th possesses the lowest excitation energy of all currently known nuclear levels. The energy difference between the ground- and first-excited (isomeric) state…

The thorium-229 low-energy isomer and the nuclear clock

- PhysicsNature Reviews Physics
- 2021

The 229Th nucleus has an isomeric state at an energy of about 8 eV above the ground state, several orders of magnitude lower than typical nuclear excitation energies. This has inspired the…

Nuclear Excitation of the ^{229}Th Isomer via Defect States in Doped Crystals.

- PhysicsPhysical review letters
- 2020

It is shown that although previously viewed as a nuisance, the defect states provide a starting point for nuclear excitation via electronic bridge mechanisms involving stimulated emission or absorption using an optical laser.

Excitation of ^{229m}Th at Inelastic Scattering of Low Energy Electrons.

- PhysicsPhysical review letters
- 2020

The cross section of the time reversed process is large, and as a consequence, the probability of the nonradiative ^{229m}Th decay via the conduction electrons in metal is close to the internal conversion probability in the Th atom.

Laser spectroscopic characterization of the nuclear-clock isomer 229mTh

- PhysicsNature
- 2018

The laser spectroscopic investigation of the hyperfine structure of the doubly charged 229mTh ion and the determination of the fundamental nuclear properties of the isomer, namely, its magnetic dipole and electric quadrupole moments, as well as its nuclear charge radius are presented.

The theory of direct laser excitation of nuclear transitions

- Physics
- 2020

A comprehensive theoretical study of direct laser excitation of a nuclear state based on the density matrix formalism is presented. The nuclear clock isomer $^{229\text{m}}$Th is discussed in detail,…

Toward an energy measurement of the internal conversion electron in the deexcitation of the
Th229
isomer

- PhysicsPhysical Review C
- 2018

The first excited isomeric state of Th-229 has an exceptionally low energy of only a few eV and could form the gateway to high-precision laser spectroscopy of nuclei. The excitation energy of the…

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