An excitation function of one- and two-neutron transfer channels for the ^{60}Ni+^{116}Sn system has been measured with the magnetic spectrometer PRISMA in a wide energy range, from the Coulomb barrier to far below it. The experimental transfer probabilities are well reproduced, for the first time with heavy ions, in absolute values and in slope by microscopic calculations which incorporate nucleon-nucleon pairing correlations.
We performed a γ-particle coincidence experiment for the 60 Ni + 116 Sn system to investigate whether the population of the two-neutron pickup channel leading to 62 Ni is mainly concentrated in the ground-state transition, as has been found in a previous work [D. Montanari et al., Phys. Rev. Lett. 113, 052501 (2014)]. The experiment has been performed by employing the PRISMA magnetic spectrometer coupled to the Advanced Gamma Tracking Array (AGATA) demonstrator. The strength distribution of excited states corresponding to the inelastic, one-and two-neutron transfer channels has been extracted. We found that in the two-neutron transfer channel the strength to excited states corresponds to a fraction (less than 24%) of the total, consistent with the previously obtained results that the 2n channel is dominated by the ground-state to ground-state transition.
Electrochemical energy
storage has been at the center of interest
over the past years due to the ever-faster technological development
and the need for high-capacity batteries with high voltages and energy
densities. Alkali batteries show the greatest potential for improving
current characteristics, and this work examines several hexagonal
boron nitride configurations as electrodes for ion batteries. First-principles
calculations based on density functional theory have been used to
study structural, electronic, and electrochemical properties of a
graphenelike hexagonal boron nitride (h-BN) monolayer for various
point defects. The maximum theoretical capacities for alkali earth
metal ions adsorbed on the h-B9N8 monolayer
are 762.264, 571.698, and 127.044 mAh/g, and average electrode potentials
are 0.188, 0.009, and 5.735 V for the adsorption of Li+, Na+, and K+, respectively. Studied structures
have been explored for the use as anode materials to hold alkali metal
ions, namely, Li+, K+, and Na+, and
we have found that for some cases, the alkali metal–h-BN structure
shows metallic character, which leads to good electrical conductivity,
without the change of structural geometry. Our results show that studied
materials have characteristics suitable for the electrode-based ion
batteries.
Optical properties of 2D materials can be effectively modulated by employing multilayer structures with different number of layers. Using the theoretical approach based on density functional theory we simulated relevant optical spectra of antimony and indium mono-and multilayers. We showed that the electronic band structures of antimonene and indiene possess numerous tracking bands enhancing the transition probability. Therefore, high absorption coefficients are found. Modelled multilayer nanostructures of antimonene and indiene experience a red-shift of absorption bands. Antimonene exhibits an optical directional anisotropy regarding the absorbance coefficient and reflectance spectrum for different nanolayer thicknesses. Indiene possesses very high reflectance and refractive index in the visible and IR spectrum which can be effectively modulated by the number of layers. Our work shows that antimonene and indiene multilayers harbour untapped potential for the optical applications at the nanoscale.
Inorganic perovskite CaMnO
3
${{}_{3}}$
was proposed as a substitution for the TiO
2
${{}_{2}}$
anatase in electron transport layers of solar cells containing the hybrid perovskite CH
3
${{}_{3}}$
NH
3
${{}_{3}}$
PbI
3
${{}_{3}}$
based on increased mobility of electrons and better optical matching. Due to a suitable band gap concerning the absorption of sunlight, we investigate the potential of CaMnO
3
${{}_{3}}$
and similar manganite perovskites, where Ca is replaced by either Sr, Ba or La, as an absorber layer in inorganic perovskite solar cells. In this study, we have used optical measurements on the synthesized AMnO
3
${{}_{3}}$
(A=Ca, Sr, Ba, La) samples to aid density functional theory calculations (DFT) in order to accurately simulate the electronic and optical properties of AMnO
3
${{}_{3}}$
compounds and gauge their potential for the role of absorber layer. Both experimental measurements and theoretical calculations show suitable band gap of 1.1‐1.5 eV, depending on the compound, and absorption coefficients of the order of
105
${{10}^{5}}$
cm
-1
${{}^{-1}}$
in the visible part of the spectrum.
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