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The High Energy Photons From Very Symmetric Reactions: The Giant Dipole Resonance In179Au Nucleus

 

作者: F. Camera,   A. Bracco,   F. Della Vedova,   S. Leoni,   B. Million,   S. Mantovani,   M. Pignanelli,   O. Wieland,   V. Nanal,   M. P. Carpenter,   D. Hoffman,   B. B. Back,   A. M. Heinz,   R. V. F. Janssens,   D. Jenkins,   T. L. Khoo,   F. G. Kondev,   T. Lauritsen,   C. J. Lister,   B. Mcclintock,   S. Mitsuoka,   E. F. Moore,   D. Seweryniak,   R. Siemssen,   R. J. Van Swol,   M. Thoennessen,   K. Eisenman,   P. Heckman,   J. Seitz,   R. Varner,   M. Halbert,   I. Dioszegi,   A. Lopez‐Martens,  

 

期刊: AIP Conference Proceedings  （AIP Available online 1903）
卷期: Volume 656, issue 1  

页码: 121-128

 

ISSN:0094-243X

 

年代: 1903

 

DOI:10.1063/1.1556632

 

出版商: AIP

 

数据来源: AIP

 

摘要:

High‐energy &ggr; rays emitted in the symmetric reaction90Zr +89Y have been measured at the Argonne National Laboratory using the LEPPEX array coupled to the Fragment Mass Analyzer (FMA). The high‐energy &ggr;‐ray spectra emitted by the giant dipole resonance built on excited states and associated with the evaporation of 0, 1 and 2 nucleons have been measured. The statistical model analysis indicates that the radiative‐fusion process, namely the 0 particle emission channel, can be well described as a compound nucleus decay channel. In addition, the analysis of the high‐energy &ggr;‐ray spectra associated with the different evaporation channels provides the first evidence that shell effects still play a role in determining the nuclear shapes of179Au in the temperature interval 0.5–1 MeV. © 2003 American Institute of Physics

 

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