Isotopes of Nobelium (Z=102)

Click on an isotope to get more information about its decay
Isotope Half-life Spin Parity Decay Mode(s) or Abundance
249No
250No 0.25 ms0+ %SF=100, %A ~ 0.05 sys
251No 0.8 s %A ~ 100, %EC ~ 1 sys%SF < 8
252No 2.30 s 0+ %A=73.1 19, %SF=26.9 19
253No 1.7 m (9/2-) %A ~ 80, %EC ~ 20 sys
254No 55 s 0+ %A=90 4, %EC=10 4, %SF=0.17 5
254m1No 0.28 s %IT>80
255No 3.1 m(1/2+) %A=61.4 25, %EC=38.6 25
256No 2.91 s 0+ %A=99.5 1, %SF=0.53 +8-4
257No 25 s(7/2+) %A ~ 100
258No 1.2 ms 0+ %SF=100, %A ~ 1E-3 sys
259No 58 m (9/2+) %A=75 4, %EC=25 4, %SF<10
260No 106 ms 0+ %SF=100
261No
262No 5 ms 0+ %SF=?
Isotope Explorer Nuclear Structure and Decay Data
8th Edition of the Table of Isotopes
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