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Progress in the study of the gamma decay of the Giant Dipole Resonance in very hot rotating nuclei

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Title: Progress in the study of the gamma decay of the Giant Dipole Resonance in very hot rotating nuclei
Authors: Bracco, A.1, Camera, F.1
Source: Nuclear Physics A. May2007, Vol. 788 Issue 1-4, p205-214. 10p.
Subjects: Resonance, Nuclear physics, Spectrum analysis, Gamma rays
Abstract: The γ decay of the Giant Dipole Resonance in 132 Ce nuclei has been measured in the compound temperature range 2.5 - 4.1 MeV using a symmetric reaction 64 Ni (300, 400, 500 MeV) + 68 Zn and an asymmetric one 16 O (130, 250 MeV) + 116 Sn. Both cases produce 132Ce compound nuclei at the same excitation energy and angular momentum. Light charged particles and evaporation residues have been measured in coincidence with high energy γ-rays. The data show that pre-equilibrium emission is present only in the asymmetric reaction while only statistical emission from a fully equilibrated 132 Ce compound is present in the symmetric one. The measured Giant Dipole Resonance widths show an almost linear increase with the effective temperature. Such a measured trend is reproduced by the thermal fluctuation model which includes the lifetime of the compound nucleus. The comparison between the high energy γ-ray spectra in the symmetric and asymmetric reactions shows a dynamic dipole emission in the 16 O-induced reaction. The yield is consistent with what has been previously measured in the same mass and energy range. [Copyright &y& Elsevier]
Copyright of Nuclear Physics A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 25083836
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Progress in the study of the gamma decay of the Giant Dipole Resonance in very hot rotating nuclei
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  Data: <searchLink fieldCode="AR" term="%22Bracco%2C+A%2E%22">Bracco, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Camera%2C+F%2E%22">Camera, F.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Nuclear+Physics+A%22">Nuclear Physics A</searchLink>. May2007, Vol. 788 Issue 1-4, p205-214. 10p.
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  Label: Abstract
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  Data: The γ decay of the Giant Dipole Resonance in 132 Ce nuclei has been measured in the compound temperature range 2.5 - 4.1 MeV using a symmetric reaction 64 Ni (300, 400, 500 MeV) + 68 Zn and an asymmetric one 16 O (130, 250 MeV) + 116 Sn. Both cases produce 132Ce compound nuclei at the same excitation energy and angular momentum. Light charged particles and evaporation residues have been measured in coincidence with high energy γ-rays. The data show that pre-equilibrium emission is present only in the asymmetric reaction while only statistical emission from a fully equilibrated 132 Ce compound is present in the symmetric one. The measured Giant Dipole Resonance widths show an almost linear increase with the effective temperature. Such a measured trend is reproduced by the thermal fluctuation model which includes the lifetime of the compound nucleus. The comparison between the high energy γ-ray spectra in the symmetric and asymmetric reactions shows a dynamic dipole emission in the 16 O-induced reaction. The yield is consistent with what has been previously measured in the same mass and energy range. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nuclear Physics A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.nuclphysa.2007.01.083
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 205
    Subjects:
      – SubjectFull: Resonance
        Type: general
      – SubjectFull: Nuclear physics
        Type: general
      – SubjectFull: Spectrum analysis
        Type: general
      – SubjectFull: Gamma rays
        Type: general
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      – TitleFull: Progress in the study of the gamma decay of the Giant Dipole Resonance in very hot rotating nuclei
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            NameFull: Bracco, A.
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            NameFull: Camera, F.
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              Text: May2007
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              Y: 2007
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              Value: 788
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              Value: 1-4
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            – TitleFull: Nuclear Physics A
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