Nuclear Wallet Card - Z( 99)


   Isotope[1]              delta      T1/2 or
  Z   El   A    Jpi[2]     (MeV)[3]   Abundance[4]   Decay Mode[5]
 === === ====   =======   =========  =============  =====================
  99 Es  242               64.9s        ~ 7 s       EC ,EF
         243               64.9s        21 s 2      EC <= 70%,A >= 30%
         244               66.0s        37 s 4      EC 96%,A 4%
         245    (3/2-)     66.4s       1.1 m 1      EC 60%,A 40%
         246   (4-,6+)     68.0s       7.7 m 5      EC 90.1%,A 9.9%
         247    (7/2+)     68.60s     4.55 m 26     EC ~ 93%,A ~ 7%
         248   (2-,0+)     70.29        27 m 4      EC > 99%,A ~ 0.25%
         249    7/2(+)     71.17s     102.2 m 6     EC 99.43%,A 0.57%
         250     (6+)      73.27s      8.6 h 1      EC > 97%,A < 3%
         250M    1(-)      73.27s      2.22 h 5     EC >= 99%,A <= 1%
         251    (3/2-)    74.504        33 h 1      EC 99.51%,A 0.49%
         252     (5-)      77.29      471.7 d 19    A 76%,EC 24%,B- ~ 0.01%
         253     7/2+     79.008      20.47 d 3     A,SF 8.7E-6%
         254     (7+)     81.988      275.7 d 5     A,EC <1.0E-4%
                                                    SF <3.0E-6%
         254M     2+      82.066       39.3 h 2     B- 98%,IT < 3%
                                                    A 0.33%
         255    (7/2+)     84.08      39.8 d 12     B- 92%,A 8%,SF 4.1E-3%
         256     (1+)      87.15s     25.4 m 24     B-
         256M    (8+)      87.15s      ~ 7.6 h      B-
         257               89.4s        2 s ?       SF ?%
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