| İzotop | Kütlesi | Yarı ömrü | Bozunma Şekli | Dönüştüğü İzotop | Nükleer
Spin |
| 71Kr | 70,951 | 0,064 sn. | e- ykl. + p+ | 70Se | |
| e- yakalama | 71Br | ||||
| 72Kr | 71,942 | 17,2 sn. | e- yakalama | 72Br | 0+ |
| 73Kr | 72,939 | 27 sn. | e- ykl. + p+ | 72Se | 5/2- |
| e- yakalama | 73Br | ||||
| 74Kr | 73,9333 | 11,5 dk. | e- yakalama | 74Br | 0+ |
| 75Kr | 74,931 | 4,3 dk. | e- yakalama | 75Br |
5/2+ |
| 76Kr | 75,9259 | 14,8 saat | e- yakalama | 76Br | 0+ |
| 77Kr | 76,9247 | 74,4 dk. | e- yakalama | 77Br |
5/2+ |
| 79Kr | 78,9201 | 35,04 saat | e- yakalama | 79Br | 1/2- |
| 81Kr | 80,9166 | 229.000 yıl | e- yakalama | 81Br | 7/2+ |
| 85Kr | 84,9125 | 10.756 yıl | 85Rb | 9/2+ | |
| 87Kr | 86,9134 | 76,3 dk. | 87Rb | 5/2+ | |
| 88Kr | 87,9144 | 2,84 saat | 88Rb | 0+ | |
| 89Kr | 88,9176 | 3,15 dk. | 89Rb | 2+, 5/2+ | |
| 90Kr | 89,9195 | 32,32 sn. | 90Rb | 0+ | |
| 91Kr | 90,9234 | 8,57 sn. | 91Rb | 5/2+ | |
| 92Kr | 91,9262 | 1,840 sn. | 91Rb | 0+ | |
| 92Rb | |||||
| 93Kr | 92,931 | 1,286 sn. | 92Rb | 1/2+ | |
| 93Rb | |||||
| 94Kr | 93,934 | 0,2 sn. | 93Rb | 0+ | |
| 94Rb | |||||
| 95Kr | 94,94 | 0,78 sn. | 95Rb | 1/2 | |
| 97Kr | 96,949 | >150 nanosn. | 97Rb | 3/2+ |