J.J. Wynne, J.A. Armstrong, et al.
Physical Review Letters
Absorption measurements of the 7s13p-7s52p 1P10 Rydberg series in Ra I are presented. A value of the first ionisation limit (42573.36+or-0.02 cm-1) is derived. From these measurements and from a systematic trend in Ca I, Sr I and Ba I a multichannel quantum defect theory (MODT) analysis is used to predict the location of the 7s9p-7s12p and 6d7p 1P10 states.
J.J. Wynne, J.A. Armstrong, et al.
Physical Review Letters
J.A. Armstrong, Archibald W. Smith
Physical Review
Archibald W. Smith, J.A. Armstrong
Physical Review Letters
A.W. Smith, J.A. Armstrong
Physics Letters