<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math>decay of the new neutron-deficient isotope<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow /><mml:mn>205</mml:mn></mml:msup><mml:mi>Ac</mml:mi></mml:math>

Zy, Zhang; Gan, Zhaoming; Ma, Long; Yu, Lingfei; Yang, H. B.; Huang, T. H.; Li, GS; Tian, Y. L.; Ys, Wang; Xu, X. X.; Wu, X. L.; Huang, M. R.; Luo, Chun; Ren, Zhenning; Zhou, Shijun; Zhou, XH; Xu, H. S.; Xiao, G. Q.

doi:10.1103/physrevc.89.014308

Cited by 41 publications

(39 citation statements)

References 14 publications

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“…where α 0 is the fine structure constant, a ex = 0.8 nm is the exciton Bohr radius, the damping parameters are γ A and γ B , and the exciton energies are ω A = 1.9 eV and ω B = 2.1 eV. v is a constant velocity, which is connected with the hopping parameter, and for MoS 2 we use the value v = 0.55 nm/fs [33,34]. This optical conductivity includes only the contribution from the bright direct excitons, which dominate due to their large oscillator strength.…”

Section: Theorymentioning

confidence: 99%

Non-Markovian spontaneous emission dynamics of a quantum emitter near a MoS2 nanodisk

Thanopulos¹,

Karanikolas

Iliopoulos

et al. 2019

Phys. Rev. B

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We introduce a photonic nanostructure made of two dimensional materials that can lead to non-Markovian dynamics in the spontaneous emission of a nearby quantum emitter. Specifically, we investigate the spontaneous emission dynamics of a two-level quantum emitter with picosecond free-space decay time, modelling J-aggregates, close to a MoS2 nanodisk. Reversible population dynamics in the quantum emitter is obtained when the emitter's frequency matches the frequency of an exciton-polariton resonance created by the nanodisk. When such isolated resonances exist, decaying Rabi oscillations may occur. The overlapping of exciton-polariton resonances also affects strongly the decay dynamics at close distances to the nanodisk, giving rise to complex decaying population oscillations. At very close distances of the emitter to the nanodisk the ultrastrong coupling regime appears, where after a very fast oscillatory partial decay of the initial population, the emitter rest population remains constant over long times and population trapping occurs. The size and material quality of the nanodisk is shown to be of lesser influence on the above results.

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Section: Theorymentioning

confidence: 99%

Non-Markovian spontaneous emission dynamics of a quantum emitter near a MoS2 nanodisk

Thanopulos¹,

Karanikolas

Iliopoulos

et al. 2019

Phys. Rev. B

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“…Details of the detection system and the method of position-time correlations were described in Refs. [9,10]. Energy calibration of these detectors was done by use of external α sources and the known α lines from 205,206 Rn, 208,209 Fr, and 210,211 Ac, which were produced in a separate reaction 40 Ar + 175 Lu.…”

mentioning

confidence: 99%

α-decay properties of the new isotopeU216

Zhang

Gan

et al. 2015

Phys. Rev. C

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The new neutron-deficient isotope 216 U was produced in the complete-fusion reaction 180 W( 40 Ar ,4n) 216 U. The evaporation residues were separated from the primary beam in flight by the gas-filled recoil separator Spectrometer for Heavy Atoms and Nuclear Structure. The activities have been identified by the α-α position and time correlation measurements. Two α-decaying states with E α = 8384(30) keV, T 1/2 = 4.72 +4.72 −1.57 ms for the ground state and E α = 10582(30) keV, T 1/2 = 0.74 +1.34 −0.29 ms for an isomeric state were identified in 216 U.

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“…The exciton binding energies computed for the first excitations of HfS 2 are systematically larger compared to those of ZrS 2 . To understand this trend, we have to analyze the behavior of the dielectric function in the monolayers, which assumes the form ε 2D (q) = 1 + α 2D q, where q are in-plane wave-vectors and α 2D is the inplane static polarizability for the 2D material [72][73][74][75][76][77]. The values of α 2D in ZrS 2 and HfS 2 are 4.21 Å and 3.60 Å, respectively [69].…”

Section: Iii1 Monolayer Zrs2 and Hfs2mentioning

confidence: 99%

Electronic and optical excitations of two-dimensional ZrS2 and HfS2 and their heterostructure

Lau

Cocchi

Draxl

2019

Phys. Rev. Materials

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In a first-principles study based on density-functional theory and many-body perturbation theory, we investigate the electronic properties and the optical excitations of ZrS2 and HfS2 monolayers and their van der Waals heterostructure. Both materials have an indirect quasi-particle band gap, which amounts to about 2.8 eV in ZrS2 and to 2.6 eV in HfS2. In both systems the valence-band maximum is at Γ and the conduction-band minimum at M. Spin-orbit coupling induces a splitting of about 100 meV at the Γ point in the valence band, while it does not affect the conduction band. The optical absorption spectra are dominated by excitonic peaks, with binding energies between 0.6 eV and 0.8 eV. The ZrS2/HfS2 heterobilayer exhibits a peculiar type-I level alignment with a large degree of hybridization between the two monolayers in the valence band, while the conduction bands retain either ZrS2 or HfS2 character, respectively. As a consequence, both the electron and the hole components of the first exciton are localized in the ZrS2 monolayer with non-vanishing probability of finding the hole also in the HfS2 sheet.

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αdecay of the new neutron-deficient isotope205Ac

Cited by 41 publications

References 14 publications

Non-Markovian spontaneous emission dynamics of a quantum emitter near a MoS2 nanodisk

Non-Markovian spontaneous emission dynamics of a quantum emitter near a MoS2 nanodisk

α-decay properties of the new isotopeU216

Electronic and optical excitations of two-dimensional ZrS2 and HfS2 and their heterostructure

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