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Collectivity evolution in the neutron-rich Pd isotopes towards the N=82 shell closure

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arxiv 1306.4439 v1 pith:PF2ZZHV2 submitted 2013-06-19 nucl-ex

Collectivity evolution in the neutron-rich Pd isotopes towards the N=82 shell closure

H. Wang , N. Aoi , S. Takeuchi , M. Matsushita , P. Doornenbal , T. Motobayashi , D. Steppenbeck , K. Yoneda
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H. Baba L. Caceres Zs. Dombradi K. Kobayashi Y. Kondo J. Lee K. Li H. Liu R. Minakata D. Nishimura H. Otsu S. Sakaguchi H. Sakurai H. Scheit D. Sohler Y. Sun Z. Tian R. Tanaka Y. Togano Zs. Vajta Z. Yang T. Yamamoto Y. Ye R. Yokoyama
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The neutron-rich, even-even 122,124,126Pd isotopes has been studied via in-beam gamma-ray spectroscopy at the RIKEN Radioactive Isotope Beam Factory. Excited states at 499(9), 590(11), and 686(17) keV were found in the three isotopes, which we assign to the respective 2+ -> 0+ decays. In addition, a candidate for the 4+ state at 1164(20) keV was observed in 122Pd. The resulting Ex(2+) systematics are essentially similar to those of the Xe (Z=54) isotopic chain and theoretical prediction by IBM-2, suggesting no serious shell quenching in the Pd isotopes in the vicinity of N=82.

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