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In nuclear physics, an atomic nucleus is called a halo nucleus or is said to have a nuclear halo when it has a core nucleus surrounded by a halo of orbiting protons or neutrons. The electrons then orbit the core nucleus much further away than the orbit of the halo nucleons.  2, fiche 1, Anglais, - halo%20nucleus

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halo nuclei: plural form.  3, fiche 1, Anglais, - halo%20nucleus

Fiche 1,  Justifications,  Français

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Les noyaux les plus légers possèdent des propriétés étonnantes, c'est le cas des noyaux à halos comme le Lithium 11 ou le Béryllium 14. Ces noyaux comportent un halo formé d'un ou plusieurs neutrons, qui se trouvent à une distance importante du reste du noyau.  2, fiche 1, Français, - noyau%20%C3%A0%20halo

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Fiche 2,  Justifications,  Anglais

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In nuclear physics, an atomic nucleus is called a halo nucleus or is said to have a nuclear halo when it has a core nucleus surrounded by a halo of orbiting protons or neutrons. The electrons then orbit the core nucleus much further away than the orbit of the halo nucleons.  1, fiche 2, Anglais, - nuclear%20halo

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Halo orbit theory.  1, fiche 3, Anglais, - parallel%20shooting%20algorithm

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Fiche 4,  Justifications,  Anglais

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The trajectory of a body under gravitational forces that evolves not around a celestial body but in the vicinity of a Lagrange point.  2, fiche 4, Anglais, - halo%20orbit

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The Lagrangian points ... are the five positions in an orbital configuration where a small object affected only by gravity can theoretically be stationary relative to two larger objects (such as a satellite with respect to the Earth and Moon). The Lagrange points mark positions where the combined gravitational pull of the two large masses provides precisely the centripetal force required to rotate with them. They are analogous to geosynchronous orbits in that they allow an object to be in a "fixed" position in space rather than an orbit in which its relative position changes continuously.  3, fiche 4, Anglais, - halo%20orbit

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Trajectoire d'un corps qui évolue, sous l'action des forces de gravitation, non pas autour d'un astre mais au voisinage d'un point de Lagrange.  2, fiche 4, Français, - orbite%20en%20halo

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Les points de Lagrange, au nombre de cinq, sont des points de l'espace où le potentiel gravitionnel créé par un ensemble de deux astres atteint localement un maximum ou un minimum.  2, fiche 4, Français, - orbite%20en%20halo

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Fiche 5,  Justifications,  Anglais

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Objects placed at these points tend to move in "halo orbits" and require modest stationkeeping to avoid eventual ejection. NASA Goddard Space Flight Center engineer Robert Farquhar advocates using the Earth-moon L-2 point as the site for a Halo-Orbit Space Station(HOSS) supporting lunar surface operations.  2, fiche 5, Anglais, - halo%2Dorbit%20space%20station

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