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HK: Fachverband Physik der Hadronen und Kerne

HK 42: Struktur und Dynamik von Kernen VII

HK 42.2: Vortrag

Donnerstag, 18. März 2010, 14:15–14:30, HG II

Structure of Ba with N ∼90 and Ra with N∼132 from high precision mass measurements of ^136−146Xe and ^223−229Rn — •R. Burcu Cakirli¹ and Rick Casten² — ¹Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany — ²Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8120, USA

Recent ^136−146Xe and ^223−229Rn atomic mass results from the double Penning trap mass spectrometer ISOLTRAP at ISOLDE-CERN will be presented [1-2]. These new results include the first measurements on ^144−146Xe and ^223−229Rn (including the first identification of ²²⁹Rn). Proton-neutron interaction strengths, δV_pn, extracted from these new atomic mass results, double differences of binding energies, will be shown for both the N∼90 and N∼132 regions, in particular for Ba and Ra. Structural effects will be discussed considering the δV_pn results. A unique pattern was identified in both regions. In addition, microscopic density functional theory predictions for δV_pn will be compared with the experimental results.

[REREFENCES]:

[1] D. Neidherr et al., Phys. Rev. Lett., 102, 112501 (2009).

[2] D. Neidherr, R.B. Cakirli et al., Phys. Rev. C 80, 044323 (2009).