Nuclear Excitation by Electron Capture in Excited Ions

Gargiulo, Simone; Madan, Ivan; Carbone, Fabrizio

doi:10.48550/arxiv.2102.05718

Cited by 5 publications

(8 citation statements)

References 23 publications

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“…Since both NEEC and NEµC depend on the interaction between nuclear and atomic environment, tight muon orbits are expected to provide higher nuclear excitation cross section than their electronic counter parts. In particular, here we report findings of NEµC integrated cross section up to 1.82 × 10 5 b eV, that is five orders of magnitude higher than any corresponding NEEC cross section reported so far [25][26][27][28][29].…”

Section: Particle-induced Fissioncontrasting

confidence: 58%

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Nuclear Excitation by Muon Capture

Gargiulo

Carbone

et al. 2022

Preprint

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Efficient excitation of nuclei via exchange of a real or virtual photon has a fundamental importance for nuclear science and technology development. Here, we present a new mechanism of nuclear excitation based on the capture of a free muon into the atomic orbits (NEμC). The cross section of such a new process is evaluated using the Feshbach projection operator formalism and compared to other known excitation phenomena, i.e. photo-excitation and nuclear excitation by electron capture (NEEC), showing up to ten orders of magnitude increase in cross section. NEμC is particularly interesting for MeV excitations that become accessible thanks to the stronger binding of muons to the nucleus. The binding energies of muonic atoms have been calculated introducing a state of the art modification to the Flexible Atomic Code (FAC). An analysis of an experimental scenarios in the context of modern muon production facilities shows that the effect can be detectable for selected isotopes. The total probability of NEμC is predicted to be $ P \approx \SI{1e-6}{}$ per incident muon in a beam-based scenario. Given the high transition energy provided by muons, NEμC can have important consequences for isomer feeding and particle-induced fission.

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Section: Particle-induced Fissioncontrasting

confidence: 58%

“…Futhermore, an increase in the excitation cross section is expected if the wavefunction of the muon is engineered [39], i.e. considering muon vortex beams [40], as recently suggested for NEEC [8,29,41]. This modification of the wavefunction could make unfavourable transitions with higher multipolarity more likely to happen.…”

mentioning

confidence: 87%

Nuclear Excitation by Muon Capture

Gargiulo

Carbone

et al. 2022

Preprint

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Section: Particle-induced Fissionmentioning

confidence: 91%

Nuclear Excitation by Muon Capture

Gargiulo¹,

Gu²,

Carbone³

et al. 2022

Preprint

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Efficient excitation of nuclei via exchange of a real or virtual photon has a fundamental importance for nuclear science and technology development. Here, we present a new mechanism of nuclear excitation based on the capture of a free muon into the atomic orbits (NEµC). The cross section of such a new process is evaluated using the Feshbach projection operator formalism and compared to other known excitation phenomena, i.e. photo-excitation and nuclear excitation by electron capture (NEEC), showing up to ten orders of magnitude increase in cross section. NEµC is particularly interesting for MeV excitations that become accessible thanks to the stronger binding of muons to the nucleus. The binding energies of muonic atoms have been calculated introducing a state of the art modification to the Flexible Atomic Code (FAC). An analysis of an experimental scenarios in the context of modern muon production facilities shows that the effect can be detectable for selected isotopes. The total probability of NEµC is predicted to be P ≈ 1 × 10 −6 per incident muon in a beam-based scenario. Given the high transition energy provided by muons, NEµC can have important consequences for isomer feeding and particle-induced fission.

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“…These observables survive for mesoscopic targets of the size of 1/κ and can be readily checked in experiment, provided the experiments [27,28,29] can increase the flux of vortex neutrons. Remarkable opportunities offered by vortex electrons for nuclear physics were discovered and discussed in [210,209].…”

Section: Nuclear and Hadronic Processesmentioning

confidence: 99%

Promises and challenges of high-energy vortex states collisions

Ivanov

2022

Preprint

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Vortex states of photons, electrons, and other particles are non-plane-wave solutions of the corresponding wave equation with helicoidal wave fronts. These states possess an intrinsic orbital angular momentum with respect to the average propagation direction, which represents a new degree of freedom, previously unexplored in particle or nuclear collisions.Vortex states of photons, electrons, neutrons, and neutral atoms have been experimentally produced, albeit at low energies, and are being intensively explored. Anticipating future experimental progress, one can ask what additional insights on nuclei and particles one can gain once collisions of high-energy vortex states become possible. This review describes the present-day landscape of physics opportunities, experimental progress and suggestions relevant to vortex states in high energy collisions. The aim is to familiarize the community with this emergent cross-disciplinary topic and to provide a sufficiently complete literature coverage, highlighting some results and calculational techniques.

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Nuclear Excitation by Electron Capture in Excited Ions

Cited by 5 publications

References 23 publications

Nuclear Excitation by Muon Capture

Nuclear Excitation by Muon Capture

Nuclear Excitation by Muon Capture

Promises and challenges of high-energy vortex states collisions

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