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Shape coexistence in the neutron-deficient lead region: A systematic study of lifetimes in the even-even <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Hg</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>188</mml:mn><mml:mo>โ</mml:mo><mml:mn>200</mml:mn></mml:mrow></mml:mmultiscripts></mml:math> with the GRIFFIN spectrometer at TRIUMF
Lifetimes of $2^+_1$ and $4^+_1$ states, as well as some negative-parity and non-yrast states, in $^{188-200}$Hg were measured using $\gamma-\gamma$ electronic fast timing techniques with the LaBr$_3$(Ce) detector array of the GRIFFIN spectrometer. The excited states were populated in the $\epsilon/\beta^+$-decay of $J^\pi =7^+/2^-$ $^{188-200}$Tl produced at the TRIUMF-ISAC facility. โฆ