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A Cu-Fe nanocomposite containing 50 nm thick iron filaments dispersed in a copper matrix was processed by torsion under high pressure at various strain rates and temperatures. The resulting nanostructures were characterized by transmission…

Erosion of surface atoms of solid materials by ion bombardment (surface-sputtering) causes nano-ripples and quantum dots to self-organise on the surfaces. The self-organisation had been shown, in some sputtering experiments, to be…

化学物理 · 物理学 2015-10-12 Raphael O. Akande , Emmanuel O Oyewande

We construct a new reduced nuclear reaction network able to reproduce the energy production due to the photo-disintegration of heavy elements such as Ru, which are believed to occur during superbursts in mixed H/He accreting systems. We use…

天体物理学 · 物理学 2009-11-13 C. Noel , S. Goriely , Y. Busegnies , M. V. Papalexandris

Gamma ray heating and neutrino cooling rates, due to weak interaction processes, on $sd$-shell nuclei in stellar core are calculated using the proton neutron quasiparticle random phase approximation theory. The recent extensive experimental…

核理论 · 物理学 2025-05-05 Muhammad Fayaz , Jameel-Un Nabi , Muhammad Majid

We investigate the influences of the nuclear composition on the weak interaction rates of heavy nuclei during the core collapse of massive stars. The nuclear abundances in nuclear statistical equilibrium (NSE) are calculated by some…

高能天体物理现象 · 物理学 2017-03-21 Shun Furusawa , Hiroki Nagakura , Kohsuke Sumiyoshi , Chinami Kato , Shoichi Yamada

Using the new results on coherent elastic neutrino-nucleus scattering data in cesium-iodide provided by the COHERENT experiment, we determine a new measurement of the average neutron rms radius of $^{133}\text{Cs}$ and $^{127}\text{I}$. In…

高能物理 - 唯象学 · 物理学 2022-01-05 M. Cadeddu , N. Cargioli , F. Dordei , C. Giunti , Y. F. Li , E. Picciau , C. A. Ternes , Y. Y. Zhang

In general, with the addition of solutes, the yield strength of alloys is expected to increase and this phenomenon is known as solid solution strengthening. However, reports on the ``anomalous'' softening with alloying additions are not…

材料科学 · 物理学 2021-06-15 G Kamalakshi , Prita Pant , M P Gururajan

A filamentary composite elaborated by cold drawing was processed by High Pressure Torsion (HPT). The nanostructure resulting from this severe plastic deformation (SPD) was investigated thanks to scanning electron microscopy, transmission…

材料科学 · 物理学 2007-05-23 Xavier Sauvage , Florian Wetscher , Philippe Pareige

As the semiconductor industry turns to alternate conductors to replace Cu for future interconnect nodes, much attention as been focused on evaluating the electrical performance of Ru. The typical hexagonal close-packed (hcp) phase has been…

A systematic study of high energy, one-neutron removal reactions on 23 neutron-rich, psd--shell nuclei (Z=5-9, A=12-25) has been carried out. The longitudinal momentum distributions of the core fragments and corresponding single-neutron…

According to classical Miedema theory, reducing crystals to the order of nanometer sizes might greatly modulate the mixing enthalpy of elements, thus enabling the invention of a lot of new bulk-immiscible alloys. Although numerous alloys…

We compute the spectra of cosmic-ray (CR) nuclei and antinuclei under a scenario where hadronic interaction processes inside supernova remnants (SNRs) can produce a diffusively-shock-accelerated "source component" of secondary particles.…

高能天体物理现象 · 物理学 2018-07-31 Nicola Tomassetti , Alberto Oliva

The stability of the stored information in recording media depends on the anisotropy energy Ea = KeffV of nanoparticles (NPs) of volume V or diameter D. Therefore, the knowledge of how the effective magnetic anisotropy Keff varies with D…

材料科学 · 物理学 2017-10-24 Sobhit Singh , M. S. Seehra

The incorporation of plasmonic metal nanostructures into semiconducting chalcogenides, in the form of core-shell structures, represents a promising approach to boosting the performance of photodetectors. In this study, we combined Au…

Using a combination of numerical simulations and atom-probe tomography experiments, we determine the interfacial energy of Cu nanocrystals precipitated within the amorphous matrix of FINEMET (molar composition Fe72.89Si16.21B6.90Nb3Cu1).…

Recently, a semi-microscopic structure model has been presented to study the structure of a weakly-bound, two-body nucleus with a deformed core, including Pauli-blocking effects. The model has been successfully applied within the adiabatic…

核理论 · 物理学 2026-04-17 P. Punta , J. A. Lay , A. M. Moro , J. Lois-Fuentes , B. Fernández-Domínguez

Core-shell nanoparticles, particularly those having a gold core, have emerged as a highly promising class of materials due to their unique optical and thermal properties, which underpin a wide range of applications in photothermal therapy,…

计算物理 · 物理学 2025-06-06 Julien El Hajj , Gilles Ledoux , Samy Merabia

Supernova remnants (SNRs) have been regarded as major acceleration sites of Galactic cosmic rays. Recent X-ray studies revealed neutral Fe K$\alpha$ line emission from dense gas in the vicinity of some SNRs, which can be best interpreted as…

高能天体物理现象 · 物理学 2020-06-24 Hiromichi Okon , Makoto Imai , Takaaki Tanaka , Hiroyuki Uchida , Takeshi Go Tsuru

We apply the no-core shell model to the nuclear structure of odd-mass nuclei straddling $^{48}$Ca. Starting with the NN interaction, that fits two-body scattering and bound state data we evaluate the nuclear properties of $A = 47$ and $A =…

核理论 · 物理学 2015-05-18 A. G. Negoita , J. P. Vary , S. Stoica