Mass database

Author: F. Herfurth et al. 
Title: Recent high-precision mass measurements with the Penning trap spectrometer ISOLTRAP 
Year: 2005 
Link: http://dx.doi.org/10.1140/epjad/i2005-06-031-3

isotope frequency ratio ref. ion ME Isoltrap
(in keV)
ME AME 2003
(in keV)
comment
Ra-229 1.72329523(20) Cs-133  32542(24) 32563(19)  
Ra-230 1.73083533(16) Cs-133  34513(19) 34518(12)  
Fr-230 1.73087561(24) Cs-133  39500(29) 39600#(450#)  
Ra-231 1.73838950(16) Cs-133  38226(19) 38400#(300#)  
Ra-232 1.74593203(10) Cs-133  40498(12) 40650#(280#)