Precision mass measurements beyond ^{132}Sn: Anomalous behaviour of odd-even staggering of binding energies
Hakala, J., Dobaczewski, J., Gorelov, D., Eronen, T., Jokinen, A., Kankainen, A., Kolhinen, V., Kortelainen, M., Moore, I., Penttilä, H., Rinta-Antila, S., Rissanen, J., Saastamoinen, A., Sonnenschein, V., & Äystö, J. (2012). Precision mass measurements beyond ^{132}Sn: Anomalous behaviour of odd-even staggering of binding energies. Physical Review Letters, 109(3), 032501. https://doi.org/10.1103/PhysRevLett.109.032501
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Physical Review LettersDate
2012Copyright
© 2012 American Physical Society. Published in this repository with the kind permission of the publisher.
Atomic masses of the neutron-rich isotopes 121–128Cd, 129;131In, 130–135Sn, 131–136Sb, and 132–140Te have
been measured with high precision (10 ppb) using the Penning-trap mass spectrometer JYFLTRAP.
Among these, the masses of four r-process nuclei 135Sn, 136Sb, and 139;140Te were measured for the first
time. An empirical neutron pairing gap expressed as the odd-even staggering of isotopic masses shows a
strong quenching across N ¼ 82 for Sn, with a Z dependence that is unexplainable by the current
theoretical models.
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