Abstract
Recently the first-excited state in 135Sb has been observed at the excitation energy of only 282 keV and, due to its properties, interpreted as representing mainly a configuration of a d 5/2 proton coupled to the 134Sn core. It was suggested that its low-excitation is due to a relative shift of the proton d 5/2 and g 7/2 orbits due to the neutron excess. With the aim to provide more spectroscopic information on this anomalously low-lying 5/2+ state, we have measured its lifetime by the Advanced Time-Delayed βγγ(t) method at the OSIRIS fission product mass separator at Studsvik. The preliminarily measured half-life, T 1/2 = 6.0(7) ns, yields an exceptionally low B(M1; 5/2 +1 → 7/2 +1 ) value of ≤ 2.9 × 10−4 μ 2N . The result is discussed in the framework of shell model calculations.
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References
K. Amos et al., Phys. Rev. C 70, 024607 (2004).
A. Korgul et al., Phys. Rev. C 64, 021302(R) (2001).
J. Shergur et al., Phys. Rev. C 65, 034313 (2002).
H. Mach et al., Nucl. Phys. A 523, 197 (1991) and references therein.
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© 2005 Società Italiana di Fisica / Springer-Verlag
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Korgul, A. et al. (2005). On the structure of the anomalously low-lying 5/2+ state of 135Sb. In: Gross, C.J., Nazarewicz, W., Rykaczewski, K.P. (eds) The 4th International Conference on Exotic Nuclei and Atomic Masses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-37642-9_37
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DOI: https://doi.org/10.1007/3-540-37642-9_37
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