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Physical Sciences

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A search for the gamma decay of the Giant Dipole Resonance built on superdeformed nuclear configurations was made. The superdeformed states of the Eu-143 nucleus were populated using the reaction Pd-110(Cl-37, 4n)Eu-143 at a beam energy of 165 MeV. High energy gamma-rays were detected in 8 large BaF2 scintillators in coincidence with discrete transitions measured with part of the NORDBALL array (17 HPGe detectors and a 2 pi multiplicity filter). Spectra of high-energy gamma-rays gated by low-energy transitions from states fed by the superdeformed bands show an excess yield in the 7-10 MeV region with respect to those gated by transitions from states not populated by the superdeformed bands. Because the dipole oscillation along the superdeformed axis of the nucleus is expected to have a frequency corresponding to approximate to 8 MeV (low energy component of the GDR strength function), the present result gives the first experimental indication of gamma-ray emission of the GDR built on a superdeformed states.

Publication Title

Acta Physica Polonica B


Jagiellonian University Press

Grant or Award Name

Italian Istituto Nazionale di Fisica Nucleare; Polish State Committee for Scientific Research (KBN Grant No. 2 P03B 137 09); Danish Natural Science Research Council

Additional Information

G. (Giorgio) Turri was not affiliated with Embry-Riddle Aeronautical University at the time this paper was published.

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Freely available on an Open Access basis and under the conditions of Creative Commons License CC-BY 4.0.

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Nuclear Commons