S-PROCESS

Domain	Definition
Physics	In the s-process, one starts with existing iron-group nuclei. Therefore, it would only be expected to take place in second-generation stars that collapsed out of the residue of a previous supernova explosion. A flux of neutrons is required, and it is most likely that these neutrons come from various (,n) reactions in the helium-burning region of a red giant star. The seed isotope Z,A from the iron region absorbs a neutron, changing from A to A+1. If the new isotope is stable, it can absorb another neutron, going to A+2. If it is unstable, it is assumed that the neutron capture rate is low enough that the nuclide has plenty of time to decay to Z+1 by - emission before the next capture. The same neutron-absorption process is then repeated for Z+1. Thus, the nuclides produced lie in the "valley of beta stability" of the chart of the nuclides.-Educational Tour of Nuclear Data. (references)
Source: compiled by the editor from various references; see credits.

Specialty Definition: S-process

Nuclear processes

Radioactive decay processes

Alpha decay
Beta decay
Electron capture
Gamma radiation
Neutron emission
Proton emission
Spontaneous fission

Nucleosynthesis

Neutron Capture
- The R-process
- The S-process
Proton capture:
- The P-process

The S process (S for slow) is a neutron capture process in the decay of radioactive elements that occurs in lower neutron density, lower temperature conditions. Contrast with P and R-processes.

Anagrams: S-PROCESS

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "c-e-o-p-r-s-s-s"
	-1 letter: corpses, crosses, process, prosses.
	-2 letters: copers, copses, corpse, corses, crosse, posers, posses, proses, scopes, scores, spores.
	-3 letters: ceros, coper, copes, copse, cores, corps, corse, coses, cress, crops, cross, pesos, pores, poser, poses, posse, press, prose, pross, repos, ropes, roses, scope, scops, score, sores, specs, spore.
	-4 letters: ceps, cero, cess, cope, cops, core, cors, coss.
	Words containing the letters "c-e-o-p-r-s-s-s"
	+1 letter: processes.
	+2 letters: ascospores, compresses, postcrises, processors, subprocess, topcrosses.
	+3 letters: censorships, compressors, crosspieces, percussions, precessions, prefocusses, proboscises, processions, reprocesses, superscouts, supersonics, superstocks.
	+4 letters: chrysoprases, clothespress, compressions, coprocessors, corepressors, crosspatches, decompresses, gastroscopes, preciousness, predecessors, preprocesses, prospectuses, sniperscopes, sportscaster, stereoscopes, stroboscopes, subprocesses, superschools.
	+5 letters: consumerships, coprocessings, corruptnesses, craftspersons, discomposures, gastroscopies, gyrocompasses, overprocesses, percussionist, phosphoresces, postrecession, precisionists, preprocessors, processionals, protectresses, rapaciousness, repercussions, sarcophaguses, spectroscopes, spirochetoses, spirochetosis, sportscasters, stereoscopies, supercolossal, synchroscopes.
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