| İzotop | Kütlesi | Yarı ömrü | Bozunma Şekli | Dönüştüğü İzotop | Nükleer
Spin |
| 114Ba | 113,951 | 0,43 sn. | e- yakalama | 114Cs | 0+ |
| 110Xe | |||||
| 115Ba | 114,948 | 0,4 sn. | e- yakalama | 115Cs | |
| 116Ba | 115,942 | 0,3 sn. | e- yakalama | 116Cs | 0+ |
| 117Ba | 116,939 | 1,75 sn. | e-
ykl. + |
113I | 3/2 |
| e- ykl. + p+ | 116Xe | ||||
| e- yakalama | 117Cs | ||||
| 118Ba | 117,933 | 5,5 sn. | e- yakalama | 118Cs | 0+ |
| 119Ba | 118,93 | 5,4 sn. | e- ykl. + p+ | 118Xe | 5/2+ |
| e- yakalama | 119Cs | ||||
| 120Ba | 119,926 | 32 sn. | e- yakalama | 120Cs | 0+ |
| 121Ba | 120,924 | 29,7 sn. | e- ykl. + p+ | 120Xe | 5/2+ |
| e- yakalama | 121Cs | ||||
| 122Ba | 121,92 | 1,95 dk. | e- yakalama | 122Cs | 0+ |
| 123Ba | 122,919 | 2,7 dk. | e- yakalama | 123Cs | 5/2+ |
| 124Ba | 123,9151 | 11 dk. | e- yakalama | 124Cs | 0+ |
| 125Ba | 124,915 | 3,5 dk. | e- yakalama | 125Cs | 1/2+ |
| 126Ba | 125,9112 | 100 dk. | e- yakalama | 126Cs | 0+ |
| 127Ba | 126,911 | 12,7 dk. | e- yakalama | 127Cs | 1/2+ |
| 128Ba | 127,9083 | 2,43 gün | e- yakalama | 128Cs | 0+ |
| 129Ba | 128,9087 | 2,23 saat | e- yakalama | 129Cs | 1/2+ |
| 131Ba | 130,9069 | 11,50 gün | e- yakalama | 131Cs | 1/2+ |
| 133Ba | 132,906 | 11,51 yıl | e- yakalama | 133Cs | 1/2+ |
| 139Ba | 138,9088 | 83,06 dk. | 139La | 7/2- | |
| 140Ba | 139,9106 | 12,752 gün | 140La | 0+ | |
| 141Ba | 140,9144 | 18,27 dk. | 141La | 3/2- | |
| 142Ba | 141,9165 | 10,6 dk. | 142La | 0+ | |
| 143Ba | 142,9206 | 14,33 sn. | 143La | 5/2- | |
| 144Ba | 143,9229 | 11,5 sn. | 143La | 0+ | |
| 144La | |||||
| 145Ba | 144,9269 | 4,31 sn. | 145La | 5/2- | |
| 146Ba | 145,9301 | 2,22 sn. | 146La | 0+ | |
| 147Ba | 146,934 | 0,893 sn. | 146La | 3/2- | |
| 147La | |||||
| 148Ba | 147,938 | 0,607 sn. | 147La | 0+ | |
| 148La | |||||
| 149Ba | 148,942 | 0,344 sn. | 148La | ||
| 149La | |||||
| 150Ba | 149,946 | 0,3 sn. | 150La | 0+ |