Results 1 to 10 of about 697,957 (318)

Thermodynamic metal melting bases. Foundry production and metallurgy

open access: yesЛитьë и металлургия, 2020
Based on thermodynamic calculations, it is shown that metal melting is an equilibrium process that occurs at a constant temperature. In melting, microcrystals mainly disintegrate into nanocrystals.
E. I. Marukovich, V. Yu. Stetsenko
doaj   +1 more source

About solid solutions of alloys

open access: yesЛитьë и металлургия, 2023
It is shown that the open pores of the crystal lattices of iron, manganese, titanium, cobalt cannot contain hydrogen, oxygen, nitrogen and carbon atoms. In solid solutions of alloys, hydrogen and oxygen atoms are present in the adsorbed state.
E. I. Marukovich   +2 more
doaj   +1 more source

Buffer gas loaded magneto-optical traps for Yb, Tm, Er and Ho

open access: yesNew Journal of Physics, 2014
Direct loading of lanthanide atoms into magneto-optical traps (MOTs) from a very slow cryogenic buffer gas beam source is achieved, without the need for laser slowing. The beam source has an average forward velocity of 60– $70\;{\rm m}\;{{{\rm s}}^{-1}}$
Boerge Hemmerling   +4 more
doaj   +1 more source

Thermodynamic metal crystallization basics

open access: yesЛитьë и металлургия, 2020
On the basis of thermodynamic calculations it is shown that crystallization of metals is a thermodynamic process, which takes place mainly at constant temperature.
E. I. Marukovich, V. Yu. Stetsenko
doaj   +1 more source

The quantum vibes of atoms and ichthyosaurs [PDF]

open access: yesMuzikologija, 2018
The quantum mechanical description of microscopic phenomena treats minuscule particles as waves and explains why atoms and molecules absorb and emit radiation at particular frequencies.
Mølmer Klaus
doaj   +1 more source

A Eterna Busca do Indivisível: do Átomo Filosófico aos Quarks e Léptons The eternal search for the indivisible: from philosophical atom to quarks and leptons

open access: yesQuímica Nova, 1997
The fascinating search of the inner boundaries of the Universe, has been entangled, since the birth of greek philosophy 25 centuries ago, with the main epistemological changes in the History of Science.
Francisco Caruso, Vitor Oguri
doaj   +1 more source

Insights into Components of Prospective Science Teachers’ Mental Models and Their Preferred Visual Representations of Atoms

open access: yesEducation Sciences, 2019
This study focused on determining the elements of mental models of atomic structure and views on visual representations of models of atomic structure in two sub-cohorts of student teachers studying at a university in Turkey.
Aysegül Derman   +2 more
doaj   +1 more source

Suppressing dipolar relaxation in thin layers of dysprosium atoms

open access: yesNature Communications
The dipolar interaction can be attractive or repulsive, depending on the position and orientation of the dipoles. Constraining atoms to a plane with their magnetic moment aligned perpendicularly leads to a largely side-by-side repulsion and generates a ...
Pierre Barral   +6 more
doaj   +1 more source

One-dimensional array of ion chains coupled to an optical cavity

open access: yesNew Journal of Physics, 2013
We present a novel system where an optical cavity is integrated with a microfabricated planar-electrode ion trap. The trap electrodes produce a tunable periodic potential allowing the trapping of up to 50 separate ion chains aligned with the cavity and ...
Marko Cetina   +9 more
doaj   +1 more source

Improvement of the NIFS Atom and Molecular Database

open access: yesAtoms, 2019
The NIFS (National Institute for Fusion Science) Atom and Molecular Database, which has been available online since 1997, is a numerical atomic and molecular database of collision processes that is important for fusion research.
Masahiko Emoto   +5 more
doaj   +1 more source

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