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Approaching the N = 82 shell closure with mass measurements of Ag and Cd isotopes

Abstract : Mass measurements of neutron-rich Cd and Ag isotopes were performed with the Penning trap mass spectrometer ISOLTRAP. The masses of 112,114−124Ag and 114,120,122−124,126,128Cd, determined with relative uncertainties between 2 × 10−8 and 2 × 10−7, resulted in significant corrections and improvements of the mass surface. In particular, the mass of 124Ag was previously unknown. In addition, other masses that had to be inferred from Q values of nuclear decays and reactions have now been measured directly. The analysis includes various mass differences, namely the two-neutron separation energies, the applicability of the Garvey-Kelson relations, double differences of masses δVpn, which give empirical proton-neutron interaction strengths, as well as a comparison with recent microscopic calculations. The δVpn results reveal that for even-even nuclides around 132Sn the trends are similar to those in the 208Pb region.
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http://hal.in2p3.fr/in2p3-00476332
Contributor : Michel Lion <>
Submitted on : Monday, April 26, 2010 - 10:44:28 AM
Last modification on : Wednesday, September 16, 2020 - 4:17:40 PM

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M. Breitenfeldt, Ch. Borgmann, G. Audi, S. Baruah, D. Beck, et al.. Approaching the N = 82 shell closure with mass measurements of Ag and Cd isotopes. Physical Review C, American Physical Society, 2010, 81, pp.034313. ⟨10.1103/PhysRevC.81.034313⟩. ⟨in2p3-00476332⟩

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