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ヘリウム4

3 件の記事

Picture of a diffuse gray sphere with grayscale density decreasing from the center. Length scale about 1 Angstrom. An inset outlines the structure of the core, with two red and two blue atoms at the length scale of 1 femtometer.

ヘリウム4の特性と宇宙における役割究極の安定性がもたらす物理現象

ヘリウム4安定同位体超流動アルファ粒子
2026年8月10日続きを読む →
The abundances of light element nuclei during Big Bang nucleosynthesis, as a function of time since the Big Bang in seconds (lower axis) or the Standard Model plasma temperature in MeV.[10] The y-axis shows the abundance as a number density of each individual species divided by the number density of baryons.

ビッグバン元素合成宇宙最初期の20分間で起きたこと

ビッグバン元素合成BBN原始核合成軽元素
2026年8月10日続きを読む →
Helium II will "creep" along surfaces in order to find its own level—after a short while, the levels in the two containers will equalize. The Rollin film also covers the interior of the larger container; if it were not sealed, the helium II would creep out and escape.

超流動の科学粘性ゼロの世界と量子力学的な振る舞い

超流動液体ヘリウムボース＝アインシュタイン凝縮量子力学
2026年8月9日続きを読む →