Mass database

Author: M. Kowalska et al. 
Title: Preparing a journey to the east of 208Pb with ISOLTRAP: Isobaric purification at A = 209 and new masses for 211-213Fr and 211Ra 
Year: 2009 
Link: http://dx.doi.org/10.1140/epja/i2009-10835-1

isotope frequency ratio ref. ion ME Isoltrap
(in keV)
ME AME 2003
(in keV)
comment
Ra-211 1.587603913(64) Cs-133  832.0(7.9) no value(no value)  
Fr-211 1.587563810(107) Cs-133  -4140.1(11.7) no value(no value)  
Fr-212 1.595092993(76) Cs-133  -3516.0(8.8) no value(no value)  
Fr-213 1.602616827(56) Cs-133  -3553.0(5.1) no value(no value)