Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1306-2965-6 |
Объём: | 184 страниц |
Масса: | 301 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
In physical cosmology, Big Bang nucleosynthesis (or primordial nucleosynthesis, abbreviated BBN) refers to the production of nuclei other than those of H-1 (i.e. the normal, light isotope of hydrogen, whose nuclei consist of a single proton each) during the early phases of the universe. Primordial nucleosynthesis took place just a few minutes after the Big Bang and is believed to be responsible for the formation of a heavier isotope of hydrogen known as deuterium (H-2 or D), the helium isotopes He-3 and He-4, and the lithium isotopes Li-6 and Li-7. In addition to these stable nuclei some unstable, or radioactive, isotopes were also produced during primordial nucleosynthesis: tritium or H-3; beryllium-7 (Be-7), and beryllium-8 (Be-8). These unstable isotopes either decayed or fused with other nuclei to make one of the stable isotopes.
Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.