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- W2897928785 endingPage "172" @default.
- W2897928785 startingPage "91" @default.
- W2897928785 abstract "Energy in stars is provided by nuclear reactions, which, in many cases, produce radioactive nuclei. When stable nuclei are irradiated by a flux of protons or neutrons, capture reactions push stable matter out of stability into the regime of unstable species. The ongoing production of radioactive nuclei in the deep interior of the Sun via proton-capture reactions is recorded by neutrinos emitted during radioactive decay. These neutrinos escape the inner region of the Sun and can be detected on Earth. Radioactive nuclei that have relatively long half lives may also be detected in stars via spectroscopic observations and in stardust recovered from primitive meteorites via laboratory analysis. The vast majority of these stardust grains originated from Asymptotic Giant Branch (AGB) stars. This is the final phase in the evolution of stars initially less massive than ≃10 M⊙, during which nuclear energy is produced by alternate hydrogen and helium burning in shells above the core. The long-lived radioactive nucleus26Al is produced in AGB stars by proton captures at relatively high temperatures, above 60 MK. Efficient production of 26Al occurs in massive AGB stars (> 4:5 M⊙), where the base of the convective envelope reaches such temperatures. Several other long-lived radioactive nuclei, including 60Fe, 87Rb, and 99Tc, are produced in AGB stars when matter is exposed to a significant neutron flux leading to the synthesis of elements heavier than iron. Here, neutron captures occur on a timescale that is typically slower than β-decay timescales, resulting in a process known as slow neutron captures (the s-process). However, when radioactive nuclei with half lives greater than a few days are produced, depending on the temperature and the neutron density, they may either decay or capture a neutron, thus branching up the path of neutron captures and defining the final s-process abundance distribution. The effect of these branching points is observable in the composition of AGB stars and stardust. This nucleosynthesis in AGB stars could produce some long-living radioactive nuclei in relative abundances that resemble those observed in the early solar system." @default.
- W2897928785 created "2018-10-26" @default.
- W2897928785 creator A5014456697 @default.
- W2897928785 creator A5077463314 @default.
- W2897928785 date "2018-01-01" @default.
- W2897928785 modified "2023-09-26" @default.
- W2897928785 title "Low- and Intermediate-Mass Stars" @default.
- W2897928785 cites W1499006977 @default.
- W2897928785 cites W1590668246 @default.
- W2897928785 cites W1616741216 @default.
- W2897928785 cites W1644176225 @default.
- W2897928785 cites W1659875532 @default.
- W2897928785 cites W1847771812 @default.
- W2897928785 cites W1901904818 @default.
- W2897928785 cites W1967424575 @default.
- W2897928785 cites W1968397257 @default.
- W2897928785 cites W1968894348 @default.
- W2897928785 cites W1968936583 @default.
- W2897928785 cites W1970315347 @default.
- W2897928785 cites W1971108842 @default.
- W2897928785 cites W1972922322 @default.
- W2897928785 cites W1974548600 @default.
- W2897928785 cites W1975859904 @default.
- W2897928785 cites W1976493456 @default.
- W2897928785 cites W1978940394 @default.
- W2897928785 cites W1979280397 @default.
- W2897928785 cites W1980563675 @default.
- W2897928785 cites W1982537326 @default.
- W2897928785 cites W1983694238 @default.
- W2897928785 cites W1983852962 @default.
- W2897928785 cites W1987560693 @default.
- W2897928785 cites W1987824722 @default.
- W2897928785 cites W1988625176 @default.
- W2897928785 cites W1992112525 @default.
- W2897928785 cites W1992694427 @default.
- W2897928785 cites W1992737745 @default.
- W2897928785 cites W1995295069 @default.
- W2897928785 cites W1996369693 @default.
- W2897928785 cites W1998451990 @default.
- W2897928785 cites W1998693935 @default.
- W2897928785 cites W2001646918 @default.
- W2897928785 cites W2003179710 @default.
- W2897928785 cites W2003205008 @default.
- W2897928785 cites W2005184873 @default.
- W2897928785 cites W2009628515 @default.
- W2897928785 cites W2009652605 @default.
- W2897928785 cites W2012146019 @default.
- W2897928785 cites W2012870163 @default.
- W2897928785 cites W2013146258 @default.
- W2897928785 cites W2013453174 @default.
- W2897928785 cites W2014019250 @default.
- W2897928785 cites W2014785469 @default.
- W2897928785 cites W2015901344 @default.
- W2897928785 cites W2016088516 @default.
- W2897928785 cites W2019862868 @default.
- W2897928785 cites W2020038749 @default.
- W2897928785 cites W2021011110 @default.
- W2897928785 cites W2023148115 @default.
- W2897928785 cites W2025921570 @default.
- W2897928785 cites W2027075281 @default.
- W2897928785 cites W2030949623 @default.
- W2897928785 cites W2032785179 @default.
- W2897928785 cites W2034595365 @default.
- W2897928785 cites W2035983720 @default.
- W2897928785 cites W2037679495 @default.
- W2897928785 cites W2045158898 @default.
- W2897928785 cites W2046537582 @default.
- W2897928785 cites W2047376565 @default.
- W2897928785 cites W2051120367 @default.
- W2897928785 cites W2052439475 @default.
- W2897928785 cites W2057074461 @default.
- W2897928785 cites W2058838458 @default.
- W2897928785 cites W2059372824 @default.
- W2897928785 cites W2060948076 @default.
- W2897928785 cites W2062438474 @default.
- W2897928785 cites W2063188387 @default.
- W2897928785 cites W2064064721 @default.
- W2897928785 cites W2066043041 @default.
- W2897928785 cites W2067295692 @default.
- W2897928785 cites W2070407898 @default.
- W2897928785 cites W2070890852 @default.
- W2897928785 cites W2071105407 @default.
- W2897928785 cites W2071239497 @default.
- W2897928785 cites W2071447544 @default.
- W2897928785 cites W2072228937 @default.
- W2897928785 cites W2072966378 @default.
- W2897928785 cites W2076021105 @default.
- W2897928785 cites W2076088507 @default.
- W2897928785 cites W2079072105 @default.
- W2897928785 cites W2082385652 @default.
- W2897928785 cites W2084664294 @default.
- W2897928785 cites W2086824162 @default.
- W2897928785 cites W2089562645 @default.
- W2897928785 cites W2092601839 @default.
- W2897928785 cites W2094897286 @default.
- W2897928785 cites W2096489119 @default.
- W2897928785 cites W2097418627 @default.
- W2897928785 cites W2097881449 @default.