Definitions for s-process
s-process

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1. s-processnoun

   the relatively slow nucleosynthesis process, in giant stars, in which neutron capture synthesises elements up to those of atomic number 209 (at which point alpha decay becomes a deterrent to further building)

WikipediaRate this definition:0.0 / 0 votes

1. S-process

   The slow neutron-capture process, or s-process, is a series of reactions in nuclear astrophysics that occur in stars, particularly asymptotic giant branch stars. The s-process is responsible for the creation (nucleosynthesis) of approximately half the atomic nuclei heavier than iron. In the s-process, a seed nucleus undergoes neutron capture to form an isotope with one higher atomic mass. If the new isotope is stable, a series of increases in mass can occur, but if it is unstable, then beta decay will occur, producing an element of the next higher atomic number. The process is slow (hence the name) in the sense that there is sufficient time for this radioactive decay to occur before another neutron is captured. A series of these reactions produces stable isotopes by moving along the valley of beta-decay stable isobars in the table of nuclides. A range of elements and isotopes can be produced by the s-process, because of the intervention of alpha decay steps along the reaction chain. The relative abundances of elements and isotopes produced depends on the source of the neutrons and how their flux changes over time. Each branch of the s-process reaction chain eventually terminates at a cycle involving lead, bismuth, and polonium. The s-process contrasts with the r-process, in which successive neutron captures are rapid: they happen more quickly than the beta decay can occur. The r-process dominates in environments with higher fluxes of free neutrons; it produces heavier elements and more neutron-rich isotopes than the s-process. Together the two processes account for most of the relative abundance of chemical elements heavier than iron.

WikidataRate this definition:3.0 / 2 votes

1. s-process

   The s-process or slow-neutron-capture-process is a nucleosynthesis process that occurs at relatively low neutron density and intermediate temperature conditions in stars. Under these conditions heavier nuclei are created by neutron capture, increasing the atomic weight of the nucleus by one. A neutron in the new nucleus decays by beta-minus decay to a proton, creating a nucleus of higher atomic number. The rate of neutron capture by atomic nuclei is slow relative to the rate of radioactive beta-minus decay, hence the name. This process produces stable isotopes by moving along the valley of beta-decay stable isobars in the chart of isotopes. The S-process produces approximately half of the isotopes of the elements heavier than iron, and therefore plays an important role in the galactic chemical evolution. The more rapid R-process differs from the S-process by its faster rate of neutron capture of more than one neutron before beta-decay takes place.

How to pronounce s-process?

1. Alex

   US English

   David

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   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

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   Veena

   Indian

   Priya

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   Neerja

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   Zira

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   Oliver

   British

   Wendy

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   Fred

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   Tessa

   South African

How to say s-process in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of s-process in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of s-process in Pythagorean Numerology is: 6

Examples of s-process in a Sentence

1. Bill Sullivan:

   The attachment order should not be granted until after the first hearing of Merukh's claim and following the respondents being given the opportunity to present their arguments against an attachment order being made, a process that could take several weeks at least.

2. Allied Pilots Association:

   We're also very interested in any changes to the FAA's structure and certification process that would ensure that never again would a critical system like MCAS not be transparent to pilots.

3. New York:

   The only judge among the four whom the president appeared to lose much of his interest in was Raymond M. Kethledge, people close to the process said the president had found him likable but comparatively dull.

4. Najib Razak:

   I don't aspire to be a politician, all I am hoping to do is to be helpful. When you feel strongly that your country needs positive changes then one ought to be open to be helpful in that process.

5. Jeffrey Kloha:

   Though we had hoped the testing would render different results, this is an opportunity to educate the public on the importance of verifying the authenticity of rare biblical artifacts, the elaborate testing process undertaken and our commitment to transparency, as an educational institution entrusted with cultural heritage, The Museum upholds and adheres to all museum and ethical guidelines on collection care, research and display.

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/S-Process
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/S-Process
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=s-process