An i13/2intruder band in139Gd
- 1 August 1990
- journal article
- Published by IOP Publishing in Journal of Physics G: Nuclear and Particle Physics
- Vol. 16 (8) , 1233-1240
- https://doi.org/10.1088/0954-3899/16/8/019
Abstract
A rotational band of eleven gamma -rays has been observed in 139Gd showing an enhanced moment of inertia indicative of a band of higher quadrupole deformation than the low-lying states. This band is believed to be built on a single nu i13/2 intruder orbital, and extends the systematics of such bands, recently observed in several samarium nuclei (Z=62), to gadolinium (Z=64). An attempt is made to deduce the spins for levels within this band by fitting the extracted moment of inertia with a power expansion in terms of the rotational frequency. This method is also used to deduce the spins for other bands of enhanced deformation in this mass region; the method is shown to reproduce the known spins for the nu i13/2 intruder bands in the 135,137Sm isotopes.Keywords
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