13-Modul. Magnit maydoni va uning xarakteristikalari

Moddaning paydo bo‘lishi. Koinot rivojlanishining radiatsion erasi juda muxim xioblanadi. Aynan shu davrda D. Mendeleev davriy sistemasini tashkil qiluvchi elementlarning asosi – og‘ir yadrolar paydo bo‘la boshlangan. Ushbu jarayon nukleosintez deb nomlanadi. Eng engil yadro – proton Koinot paydo boshlgandan 10 sekund o‘tib paydo bo‘lgan. Ushbu davrda Koinotning temperaturasi va zichligi deyteriy – ikkita nuklondan tashkil topgan yadroni sintezi uchun etarli katta bo‘lib, proton va neytronning to‘qnashishi natijasida paydo bo‘lgan. p + n ^2H + + Q. Bu erda Q = 2.2 MeV – ushbu sintez reaksiyasida ajralib chiqadigan energiya. Keyin 10-15 minut vaqt ichida ^2H deyteriyni ^3H tritiyga aylanishi, so‘ngra deyteriy va tritiydan ^3He geliy yadrosining paydo bo‘lish reaksiyalari sodir bo‘lgan^13. Hisob natijalariga ko‘ra geliy barcha nuklonlar ichida 24 foizni tashkil qilgan. Xozirgi paytdagi kuzatuv natijalari ham shuni ta’kidlamoqda. 4-rasm. Yulduzlardagi nukleosintezning sxematik ko‘rinishi.

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4 Arnab Rai Choudhuri, Astrophysics for Physics, Cambridge University Press, 2010, 471 p.

5 Arnab Rai Choudhuri, Astrophysics for Physics, Cambridge University Press, 2010, 471 p.

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9 T. Padmanabhan, Theoretical Astrophysics, Volume I-III, Cambridge University Press, 2010.

10 James B. Hartle, Gravity: An Introduction to Einstein’s General Relativity, Pearson Education Ltd., 2013, 554 p.

11 James B. Hartle, Gravity: An Introduction to Einstein’s General Relativity, Pearson Education Ltd., 2013, 554 p.

12 T. Padmanabhan, Theoretical Astrophysics, Volume I, Cambridge University Press, 2010

13 Фильченков М.Л., Гравитация, астрофизика, космология: дополнительные главы, «ЛИБРОКОМ», 2010.