$E0$ transition strength in stable Ni isotopes

L. J. Evitts; A. B. Garnsworthy; T. Kibedi; J. Smallcombe; M. W. Reed; A. E. Stuchbery; G. J. Lane; T. K. Eriksen; A. Akber; B. Alshahrani; M. de Vries; M. S. M. Gerathy; J. D. Holt; B. Q. Lee; B. P. McCormick; A. J. Mitchell; M. Moukaddam; S. Mukhopadhyay; N. Palalani; T. Palazzo; E. E. Peters; A. P. D. Ramirez; T. Tornyi; S. W. Yates

arXiv · 1912.02881

$E0$ transition strength in stable Ni isotopes

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Abstract

Excited states in $^{58,60,62}$Ni were populated via inelastic proton scattering at the Australian National University as well as via inelastic neutron scattering at the University of Kentucky Accelerator Laboratory. The Super-e electron spectrometer and the CAESAR Compton-suppressed HPGe array were used in complementary experiments to measure conversion coefficients and $\delta(E2/M1)$ mixing ratios, respectively, for a number of $2^+ \rightarrow 2^+$ transitions. The data obtained were combined with lifetimes and branching ratios to determine $E0$, $M1$, and $E2$ transition strengths between $2^+$ states. The $E0$ transition strengths between $0^+$ states were measured using internal conversion electron spectroscopy and compare well to previous results from internal pair formation spectroscopy. The $E0$ transition strengths between the lowest-lying $2^+$ states were found to be consistently large for the isotopes studied.

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L. J. Evitts, A. B. Garnsworthy, T. Kibedi, J. Smallcombe, M. W. Reed, A. E. Stuchbery, G. J. Lane, T. K. Eriksen, A. Akber, B. Alshahrani, M. de Vries, M. S. M. Gerathy, J. D. Holt, B. Q. Lee, B. P. McCormick, A. J. Mitchell, M. Moukaddam, S. Mukhopadhyay, N. Palalani, T. Palazzo, E. E. Peters, A. P. D. Ramirez, T. Tornyi, S. W. Yates. 2019-12-05. $E0$ transition strength in stable Ni isotopes. https://arxiv.org/abs/1912.02881

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