Symbol tau_β^-
tau_β^- is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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The rapid neutron-capture process runs the opposite calculation. Where the s-process waits for each nucleus to settle before moving on, the r-process floods a small volume of matter with so many free neutrons that a nucleus can capture several before it has any real chance to beta-decay: . Under these conditions the reaction path runs far from the valley of stability, out toward the neutron drip line, where nuclei are so neutron-rich that adding one more neutron barely binds at all [ 8 ] . Capture continues, isotope after isotope, until it reaches a nucleus at one of the neutron shell closures — the magic neutron numbers 50, 82 and 126 — where the next capture is…
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Symbol tau_n
ta is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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Read this expression with the definitions, units, and assumptions supplied by the article.
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Published contexts (1)
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Equation 4 · Evolutionary Nuclear Physics
Nucleosynthesis Is Descent With Modification
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
The rapid neutron-capture process runs the opposite calculation. Where the s-process waits for each nucleus to settle before moving on, the r-process floods a small volume of matter with so many free neutrons that a nucleus can capture several before it has any real chance to beta-decay: . Under these conditions the reaction path runs far from the valley of stability, out toward the neutron drip line, where nuclei are so neutron-rich that adding one more neutron barely binds at all [ 8 ] . Capture continues, isotope after isotope, until it reaches a nucleus at one of the neutron shell closures — the magic neutron numbers 50, 82 and 126 — where the next capture is…
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