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#)