Radiative Lifetimes of Eu i , ii , and iii and Transition Probabilities of Eu i

Abstract

Radiative lifetimes of 12 odd-parity and 73 even-parity levels of Eu i, 26 even-parity levels of Eu ii, and three even-parity levels of Eu iii have been measured with time-resolved laser-induced fluorescence. These lifetimes are accurate to AE5%. In addition, Eu i branching fractions have been measured with Fourier-transform spectrometry. These are combined with the radiative lifetimes to yield absolute transition probabilities for 140 transitions of Eu i. Subject headings: atomic data-atomic processes-methods: laboratory On-line material: machine-readable table 1. INTRODUCTION