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Direct mass measurements of $^{68}$Se and $^{80}$Y

Abstract : The masses of neutron-deficient nuclides near the N=Z line with A=64-80 have been determined using a direct time-of-flight technique which employed a cyclotron as a high-resolution spectrometer. The measured atomic masses for $^{68}$Se and $^{80}$Y were 67.9421(3) u and 79.9344(2) u, respectively. The new values agree with the 2003 Atomic Mass Evaluation. The result for $^{68}$Se confirms that this nucleus is a waiting point of the rp-process, and that for $^{80}$Y resolves the conflict between earlier measurements. Using the present results and the 2003 Atomic Mass Evaluation compilation, the empirical interaction between the last proton and the last neutron in N=Z nuclei has been revisited and extended.
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Submitted on : Tuesday, July 22, 2008 - 9:07:40 AM
Last modification on : Monday, November 16, 2020 - 12:54:04 PM



M.B. Gómez-Hornillos, M. Chartier, W. Mittig, A. Lépine-Szily, L. Caballero, et al.. Direct mass measurements of $^{68}$Se and $^{80}$Y. Physical Review C, American Physical Society, 2008, 78, pp.014311. ⟨10.1103/PhysRevC.78.014311⟩. ⟨in2p3-00303355⟩



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