Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21587Fr128   Francium
J(π)=9/2-
T1/2=86.00 ns
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 0.31842
(0.007082)		 0.340 -5.230
BE 1666.951 1666.929
BE/A 7.753 7.753
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= 0.000
β3= 0.000
β4= 0.000
β6= 0.000
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay9540.35
β- - decay-2215.60
β+ - decay464.58
e-capture1486.58
1p - decay-2651.20
2p - decay-7680.42
1n - decay-6794.68
2n - decay-12271.50
2β- - decay-5712.48
β-,n-7845.74
β-,2n-16182.08
β-,d-9264.56
β-,t-11115.56
β-,α6648.56
β-,n,α-573.21
EC,p-3591.22
EC,2p-7606.54
EC,α10325.61
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 835.43 keV
T1/2 = -1
α
4.3%
E = 1121.51 keV
T1/2 = -1
α
0.9%
E = 1149.04 keV
T1/2 = -1
α
0.9%
E = 1440.02 keV
T1/2 = 4.00 ns
α
4.7%
E = 1573.1 keV
T1/2 = 3.50 ns
α
4.1%
α-energies
 
μ (nm) Q (b) E* (keV)
g=0.33(10)1500+/-75
7(3)2016
8(2)2251
9.2(2)3068
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.