Mass database

Author: G. Bollen et al. 
Title: Mass determination of francium and radium isotopes by a penning trap mass spectrometer 
Year: 1992 
Link: http://dx.doi.org/10.1080/09500349214550261

isotope frequency ratio ref. ion ME Isoltrap
(in keV)
ME AME 2003
(in keV)
comment
Fr-209 1.572518113(268) Cs-133  -3817(34) -3769(15) ratio calculated from published values 
Fr-210 1.580045961(184) Cs-133  -3363(24) -3346(22) ratio calculated from published values 
Fr-211 1.587563559(187) Cs-133  -4177(24) -4158(21) ratio calculated from published values 
Fr-212 1.595092782(208) Cs-133  -3553(26) -3538(26) ratio calculated from published values 
Fr-221 1.662946237(255) Cs-133  13267(32) 13278(5) ratio calculated from published values 
Fr-222 1.670495103(190) Cs-133  16323(24) 16349(21) ratio calculated from published values 
Ra-226 1.700651007(198) Cs-133  23652(25) 23669.1(2.3) ratio calculated from published values 
Ra-230 1.730835613(259) Cs-133  34533(33) 34518(12) ratio calculated from published values