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Einsteinium Isotopes






Proton number: 99


Stable Isotopes

There is no Einsteinium Stable isotopes known

Natural Radioactive isotopes

There is no Einsteinium Natural Radioactive isotopes known

Artificial Radioactive isotopes


Einsteinium radioactive isotope number 1: 240Es
Neutrons: 141;
Jn: Unknown;
Decay: α ?
ε ?;
t1/2: 1s ;

Einsteinium radioactive isotope number 2: 241Es
Neutrons: 142;
Jn: Unknown;
Decay: ε
α;
t1/2: 8s ;

Einsteinium radioactive isotope number 3: 242Es
Neutrons: 143;
Jn: Unknown;
Decay: α > 0.00 %
ε > 0.00 %;
t1/2: 13.5s ;

Einsteinium radioactive isotope number 4: 243Es
Neutrons: 144;
Jn: Unknown;
Decay: ε ≤ 70.00 %
α ≥ 30.00 %;
t1/2: 21s ;

Einsteinium radioactive isotope number 5: 244Es
Neutrons: 145;
Jn: Unknown;
Decay: ε : 96.00 %
α : 4.00 %;
t1/2: 37s ;

Einsteinium radioactive isotope number 6: 245Es
Neutrons: 146;
Jn: 3/2-;
Decay: ε : 60.00 %
α : 40.00 %;
t1/2: 66s ;

Einsteinium radioactive isotope number 7: 246Es
Neutrons: 147;
Jn: Unknown;
Decay: ε : 90.10 %
α : 9.90 %
ε : 3.0E-3 %;
t1/2: 462s ≈ 7.70 m;

Einsteinium radioactive isotope number 8: 247Es
Neutrons: 148;
Jn: 7/2+;
Decay: ε ~ 93.00 %
α ~ 7.00 %;
t1/2: 273s ≈ 4.55 m;

Einsteinium radioactive isotope number 9: 247Es
Neutrons: 148;
Jn: Unknown;
Decay: α ;
t1/2: 54000000s ≈ 1.71 y;

Einsteinium radioactive isotope number 10: 248Es
Neutrons: 149;
Jn: 2-,0+;
Decay: ε : 99.70 %
α ~ 0.25 %;
t1/2: 1620s ≈ 27.00 m;

Einsteinium radioactive isotope number 11: 249Es
Neutrons: 150;
Jn: 7/2+;
Decay: ε : 99.43 %
α : 0.57 %;
t1/2: 6132s ≈ 1.70 h;

Einsteinium radioactive isotope number 12: 250Es
Neutrons: 151;
Jn: 6+;
Decay: ε > 97.00 %
α < 3.00 %;
t1/2: 30960s ≈ 8.60 h;

Einsteinium radioactive isotope number 13: 250Es
Neutrons: 151;
Jn: 1-;
Decay: ε ≤ 100.00 %;
t1/2: 7992s ≈ 2.22 h;

Einsteinium radioactive isotope number 14: 251Es
Neutrons: 152;
Jn: 3/2-;
Decay: ε : 99.50 %
α : 0.50 %;
t1/2: 118800s ≈ 33.00 h;

Einsteinium radioactive isotope number 15: 252Es
Neutrons: 153;
Jn: 5-;
Decay: α : 78.00 %
ε : 22.00 %;
t1/2: 40754880s ≈ 1.29 y;

Einsteinium radioactive isotope number 16: 253Es
Neutrons: 154;
Jn: 7/2+;
Decay: α : 100.00 %
SF : 8.7E-6 %;
t1/2: 1768608s ≈ 20.47 d;

Einsteinium radioactive isotope number 17: 254Es
Neutrons: 155;
Jn: 7+;
Decay: α ~ 100.00 %
β - : 1.7E-4 %
SF < 3.0E-6 %
ε;
t1/2: 23820480s ≈ 275.70 d;

Einsteinium radioactive isotope number 18: 254Es
Neutrons: 155;
Jn: 2+;
Decay: β - : 98.00 %
IT < 3.00 %
α : 0.32 %
ε : 0.08 %
SF < 0.05 %;
t1/2: 141480s ≈ 39.30 h;

Einsteinium radioactive isotope number 19: 255Es
Neutrons: 156;
Jn: 7/2+;
Decay: β - : 92.00 %
α : 8.00 %
SF : 4.1E-3 %;
t1/2: 3438720s ≈ 39.80 d;

Einsteinium radioactive isotope number 20: 256Es
Neutrons: 157;
Jn: 1+,0-;
Decay: β - : 100.00 %;
t1/2: 1524s ≈ 25.40 m;

Einsteinium radioactive isotope number 21: 256Es
Neutrons: 157;
Jn: 8+;
Decay: β - : 100.00 %;
t1/2: 27360s ≈ 7.60 h;

Einsteinium radioactive isotope number 22: 257Es
Neutrons: 158;
Jn: Unknown;
Decay: SF
β -;
t1/2: 665280s ≈ 7.70 d;

Einsteinium radioactive isotope number 23: 258Es
Neutrons: 159;
Jn: Unknown;
Decay: ε ?
α ?;
t1/2: 180s ≈ 3.00 m;
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