Learn more about these data

Close

Isotopes with half life more than 3 minutes are listed Fr, more than 10 minutes for all other cases.

Learn more about these data

Close

N.J. Stone, Table of recommended nuclear magnetic dipole moments: Part I, long-lived states, INDC(NDS)-079 Available online

Learn more about these data

Close

Juris Meija et al., Isotopic compositions of the elements 2013 (IUPAC Technical Report), Pure Appl. Chem. 88, 293 (2016), DOI

Learn more about these data

Close

I. Angeli, K.P. Marinova,Table of experimental nuclear ground state charge radii: An update, Atomic Data and Nuclear Data Tables 99, 69 (2013), DOI, Weblink

Learn more about these data

Close

N.J. Stone, Table of nuclear electric quadrupole moments, At. Data Nucl. Data Tables 111-112, 1 (2016), DOI

Learn more about these data

Close

Click on a button to see data

Isotope info

Half-life info

Natural abundance (%) info
Nuclear spin

Rms radii (fm) info

Magnetic moment (μN) info Quadrupole moment (b) info
127Ba 127 Ba 12.7 minutes 1/2 4.8204(51) 4.8204 0.0051 0.0834(10) 0.0834 0.001 1.78(14) 1.78 0.14
129Ba 129 Ba 2.23 hours 1/2 4.8248(49) 4.8248 0.0049 -0.398(16) -0.398 0.016 1.75(14) 1.75 0.14
130Ba 130 Ba Stable 0.11 0 4.8283(47) 4.8283 0.0047
131Ba 131 Ba 11.5 days 1/2 4.8276(48) 4.8276 0.0048 0.7083(2) 0.7083 0.0002
132Ba 132 Ba Stable 0.10 0 4.8303(47) 4.8303 0.0047
133Ba 133 Ba 10.55 years 1/2 4.8286(47) 4.8286 0.0047 0.7719(2) 0.7719 0.0002
134Ba 134 Ba Stable 2.42 0 4.8322(47) 4.8322 0.0047
135Ba 135 Ba Stable 6.59 3/2 4.8294(47) 4.8294 0.0047 0.8381(2) 0.8381 0.0002 0.160(3) 0.16 0.003
136Ba 136 Ba Stable 7.85 0 4.8334(46) 4.8334 0.0046
137Ba 137 Ba Stable 11.23 3/2 4.8314(47) 4.8314 0.0047 0.9375(2) 0.9375 0.0002 0.245(4) 0.245 0.004
138Ba 138 Ba Stable 71.70 0 4.8378(46) 4.8378 0.0046
139Ba 139 Ba 83.1 minutes 7/2 4.8513(49) 4.8513 0.0049 -0.973(5) -0.973 0.005 -0.573(13) -0.573 0.013
141Ba 141 Ba 18.3 minutes 3/2 4.8807(69) 4.8807 0.0069 -0.337(5) 0.337 0.005 0.454(10) 0.454 0.01
Isotope State    Theory    Experiment
137Ba+ 6s1/2 4018.87083385(18) E63
7s1/2 1211.73 E62
8s/12 542.5 E62
6p1/2 733.98 E62 743.7(3) E64
7p1/2 267 E62
8p1/2 129.35 E62
6p3/2 121.35 E62 127.2(2) E64
7p3/2 44.87 E62
8p3/2 21.91 E62
5d3/2 191.53 E62 189.7296(7) E65
6d3/2 38.39 E62
7d3/2 16.83 E62
5d5/2 -9.99 E62 -12.028(11) E65
6d5/2 6.9 E62
7d5/2 3.91 E62
135Ba+
6s1/2 3591.67011745(29) E110
6p1/2 664.6(3) E64
6p3/2 113.0(1) E64
5d3/2 169.5892(9) E65
5d5/2 -10.735(2) E65
State Property Theory Experiment
5d3/2 Lifetime 81.5(14) s
5d5/2 Lifetime 30.33(47) s 30.14(40) s
5d3/2 Quadrupole moment 2.256(11) a.u.
5d5/2 Quadrupole moment 3.319(15) a.u.
   Initial
 
   Final
 
   Transition
 
   Wavelength (nm) Matrix element    Units
 
Transition rate (s -1 ) Branching ratio
5d3/2 6s1/2 E2 2051.77 12.63(11) a.u. 0.01228(20) 1
5d5/2 6s1/2 E2 1762.17 15.80(12) a.u. 0.02742(43) 0.8318
5d5/2 5d3/2 M1 12485 1.549 μB 0.005545 0.1682