A nucleus whose shape deviates from spherical symmetry. Many nuclei with mass numbers between 155 and 185 and above 225 are spheroidal, some of which have large nuclear quadrupole moments, and some of which have rotational levels specific to spheroids that appear as excited states. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
形が球対称からずれた原子核。質量数が 155から 185の間と 225以上の原子核の多くは回転楕円体で,大きな核四重極能率をもつものがあり,また回転楕円体に固有の回転準位が励起状態として出現する。
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