Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
255100Fm155   Fermium
J(π)=7/2+
T1/2=20.07 h
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 83.800963
(0.004806)		 83.410 -3.690
BE 1896.151 1896.542
BE/A 7.436 7.437
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= 0.252
β3= 0.000
β4= 0.002
β6= -0.033
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay7239.74
β- - decay-1043.34
β+ - decay-1311.66
e-capture-289.66
1p - decay-5480.19
2p - decay-10079.31
1n - decay-5174.69
2n - decay-11690.56
2β- - decay-3006.20
β-,n-7724.30
β-,2n-13516.60
β-,d-8683.62
β-,t-7966.37
β-,α6862.55
β-,n,α77.80
EC,p-4830.10
EC,2p-11706.07
EC,α6146.70
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
α-energies
γ-energies
σ (b)
Absorption 3386.00
Capture 26.00
Fission 3360.00
 		   
[1] National Nuclear Data Center, Evaluated Nuclear Structure Data File, https://www.nndc.bnl.gov/ensdf/.
[2] M. Wang, G. Audi, A.H. Wapstra, F.G. Kondev, M. MacCormick, X. Xu, and B. Pfeiffer, Chinese Physics C, 2012, vol. 36, pp. 1603-2014.
[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.
[4] P. Möller, A.J. Sierk, T. Ichikawa, H. Sagawa, Atomic Data and Nuclear Data Tables, 2016, vol. 109-110, pp. 1-204.
[5] N.J. Stone, https://www-nds.iaea.org/publications/indc/indc-nds-0658/; Atomic Data and Nuclear Data Tables, 2016, vol. 111-112, pp. 1–28.
[6] H. de Vries, C.W. de Jager, C. de Vries, Atomic Data and Nuclear Data Tables, 1987, vol. 36, pp. 495-536.
[7] B. Pritychenko, M. Birch, B. Singh, M. Horoi, Atomic Data and Nuclear Data Tables, 2016, vol. 107, pp. 1–139; 2017, vol. 114, pp. 371–374.
[8] T. Kibedi and R.H. Spear, Atomic Data and Nuclear Data Tables, 2002, vol. 80, pp. 35-82.