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Mass Measurements of Exotic Nuclei around N=Z=40 with CSS2

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Abstract

Mass measurements of the N=Z nuclei 80Zr, 76Sr, 68Se were performed for the first time and a new measurement was obtained for 80Y, using the second cyclotron CSS2 of GANIL as a high-resolution spectrometer. Ions around N=Z were produced by fusion-evaporation in the inverse 58Ni (4.32MeVA) + 24Mg and 12C reactions. New masses were measured by a time-of-flight method, with a precision of 2⋅10−6, by using well-known masses as references. Study of the double binding energy difference δV np is then performed leading to a strong N=Z Wigner effect around N=Z=40. Knowledge of new masses in this region also plays a crucial role in the modelling of the astrophysical rp process.

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Lalleman, A.S., Auger, G., Mittig, W. et al. Mass Measurements of Exotic Nuclei around N=Z=40 with CSS2. Hyperfine Interactions 132, 313–320 (2001). https://doi.org/10.1023/A:1011928521373

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  • DOI: https://doi.org/10.1023/A:1011928521373

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