E2/M1 mixing ratios in transitions from the gamma vibrational bands to the ground state rotational bands of 102, 104, 106, 108Mo, 108, 110, 112Ru, and 112, 114, 116Pd

• Published in: The European physical journal. A, Hadrons and nuclei Vol. 54; no. 2; pp. 1 - 11
• Main Authors: Eldridge, J. M., Fenker, B., Hamilton, J. H., Goodin, C., Zachary, C. J., Wang, E., Ramayya, A. V., Daniel, A. V., Ter-Akopian, G. M., Oganessian, Yu. Ts, Luo, Y. X., Rasmussen, J. O., Zhu, S. J.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 2018; Springer Nature B.V
• Subjects: Correlation analysis; Deformation; Frontiers in Nuclear; Ground state; Hadrons; Heavy Ion and Strong Field Physics; Heavy Ions; Mixing ratio; Nuclear Fusion; Nuclear Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Regular Article - Experimental Physics; Rotational states
• ISSN: 1434-6001; 1434-601X
• DOI: 10.1140/epja/i2018-12426-5

. E 2/ M 1 mixing ratios have been measured for transitions from states in the γ vibrational bands ( I γ + ) to states in the ground state bands ( I + or [ I - 1 ] + ) of the neutron rich, even-even, deformed isotopes, 102, 104, 106, 108 Mo, 108, 110, 112 Ru, and 112, 114, 116 Pd, including from states as high as 9 γ + . These measurements were done using the GAMMASPHERE detector array, which, at the time of the experiment, had 101 working HPGe detectors, arranged at 64 different angles. A 62 μ Ci source of 252 Cf was placed inside GAMMASPHERE yielding 5 . 7 × 10 11 γ - γ - γ and higher coincidence events. The angular correlations between the transitions from the γ -bands to the ground bands, and the pure E 2 transitions within the ground band were then measured. These angular correlations yielded the mixing ratios, demonstrating that these transitions are pure or nearly pure E 2, in agreement with theory. In order to correct for possible attenuation due to the lifetime of the intermediate state in these correlations, the g -factors of the intermediate states needed to be known. Therefore, the g -factors of the 2 + states in the ground state band have been measured.