May 11, 2015 Preprint Open Access

Lorusso, G.; et al.

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  <identifier identifierType="DOI">10.15161/oar.it/75850</identifier>
  <creators>
    <creator>
      <creatorName>Lorusso, G.</creatorName>
      <givenName>G.</givenName>
      <familyName>Lorusso</familyName>
    </creator>
    <creator>
      <creatorName>et al.</creatorName>
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  <titles>
    <title>β-Decay Half-Lives of 110 Neutron-Rich Nuclei across the N = 82 Shell Gap: Implications for the Mechanism and Universality of the Astrophysical r Process</title>
  </titles>
  <publisher>INFN Open Access Repository</publisher>
  <publicationYear>2015</publicationYear>
  <subjects>
    <subject>AAM</subject>
    <subject>20152019VQR</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2015-05-11</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="Text">Preprint</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://www.openaccessrepository.it/record/75850</alternateIdentifier>
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    <relatedIdentifier relatedIdentifierType="DOI" relationType="Compiles">10.1103/PhysRevLett.114.192501</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.15161/oar.it/75849</relatedIdentifier>
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    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
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  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;The β-decay half-lives of 110 neutron-rich isotopes of the elements from 37 Rb to ₅₀Sn were measured at the Radioactive Isotope Beam Factory. The 40 new half-lives follow robust systematics and highlight the persistence of shell effects. The new data have direct implications for r-process calculations and reinforce the notion that the second (A≈130) and the rare-earth-element (A≈160) abundance peaks may result from the freeze-out of an (n,γ)⇄(γ,n) equilibrium. In such an equilibrium, the new half-lives are important factors determining the abundance of rare-earth elements, and allow for a more reliable discussion of the r process universality. It is anticipated that universality may not extend to the elements Sn, Sb, I, and Cs, making the detection of these elements in metal-poor stars of the utmost importance to determine the exact conditions of individual r-process events.&lt;/p&gt;</description>
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