Rapid increase in prescission GDR {gamma}-ray emission with energy

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A rapid increase in the emission of prescission giant dipole resonance (GDR) {gamma}-rays with bombarding energy is observed in excited Th and Cf nuclei formed in the reactions {sup 16}O+{sup 20B}Pb and {sup 32}S+{sup nat}W,{sup 208}Pb. This increase begins around E{sub exc} = 40 MeV for the {sup 16}O+{sup 208}Pb reaction and E{sub exc} = 70 MeV for the {sup 32}S-induced reactions. The excess {gamma}-ray yield above these thresholds cannot be described within the standard statistical model. Statistical model calculations which include a temperature dependent nuclear dissipation are able to reproduce simultaneously the observed GDR {gamma}-ray spectra and recently measured ... continued below

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6 p.

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Hofman, D.J.; Back, B.B. & Paul, P. December 31, 1995.

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  • Hofman, D.J.
  • Back, B.B. Argonne National Lab., IL (United States)
  • Paul, P. State Univ. of New York, Stony Brook, NY (United States). Dept. of Physics

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Description

A rapid increase in the emission of prescission giant dipole resonance (GDR) {gamma}-rays with bombarding energy is observed in excited Th and Cf nuclei formed in the reactions {sup 16}O+{sup 20B}Pb and {sup 32}S+{sup nat}W,{sup 208}Pb. This increase begins around E{sub exc} = 40 MeV for the {sup 16}O+{sup 208}Pb reaction and E{sub exc} = 70 MeV for the {sup 32}S-induced reactions. The excess {gamma}-ray yield above these thresholds cannot be described within the standard statistical model. Statistical model calculations which include a temperature dependent nuclear dissipation are able to reproduce simultaneously the observed GDR {gamma}-ray spectra and recently measured evaporation residue across sections.

Physical Description

6 p.

Notes

INIS; OSTI as DE96004821

Source

  • Groningen nuclear physics conference on giant resonances, Groningen (Netherlands), 28 Jun - 1 Jul 1995

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  • Other: DE96004821
  • Report No.: ANL/PHY/CP--87651
  • Report No.: CONF-9506131--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 192520
  • Archival Resource Key: ark:/67531/metadc673055

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • June 27, 2016, 3 p.m.

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Hofman, D.J.; Back, B.B. & Paul, P. Rapid increase in prescission GDR {gamma}-ray emission with energy, article, December 31, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc673055/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.