Quadruple moment of the i<sub>13/2</sub> intruder band in <sup>139</sup>Gd
E S Paul; S A Forbes; D B Fossan; J Gizons; J R Hughes; S M Mullins; M S Metcalfe; P J Nolan; R J Poynter; P H Regan; G Smith; R Wadsworth; E S Paul; Oliver Lodge Lab., Liverpool Univ., UK; S A Forbes; Oliver Lodge Lab., Liverpool Univ., UK; D B Fossan; Oliver Lodge Lab., Liverpool Univ., UK; J Gizons; Oliver Lodge Lab., Liverpool Univ., UK; J R Hughes; Oliver Lodge Lab., Liverpool Univ., UK; S M Mullins; Oliver Lodge Lab., Liverpool Univ., UK; M S Metcalfe; Oliver Lodge Lab., Liverpool Univ., UK; P J Nolan; Oliver Lodge Lab., Liverpool Univ., UK; R J Poynter; Oliver Lodge Lab., Liverpool Univ., UK; P H Regan; Oliver Lodge Lab., Liverpool Univ., UK; G Smith; Oliver Lodge Lab., Liverpool Univ., UK; R Wadsworth; Oliver Lodge Lab., Liverpool Univ., UK
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1992-01-01
Аннотация:
The Doppler shift attenuation method has been used to extract the mean quadruple moment of the nu i<sub>13/2</sub> intruder band in <sup>139</sup>Gd. From a centroid-shift analysis of the data, and using Braune stopping powers, a value for the intrinsic nuclear quadrupole moment of Q<sub>0</sub> approximately=7.0 eb is suggested, corresponding to a deformation beta <sub>2</sub> approximately=0.35. Because of appreciable side-feeding into the band at each level, a lineshape analysis of the data has also been attempted, in which the time structure of the side-feeding has been allowed to vary. This analysis indicates that the side-feeding is significantly slower than the in-band cascade.
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