Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
20287Fr115   Francium
J(π)=(3+)
T1/2=300.00 ms
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 3.092
(0.051)		 3.220 -0.520
BE 1559.251 1559.123
BE/A 7.719 7.718
<R2ch>1/2 = 5.55 ± 0.0178 fm [3]
Charge-density Distribution [6]

β2= -0.217
β3= 0.000
β4= 0.006
β6= 0.001
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay7388.10
β- - decay-5999.11
β+ - decay8344.25
e-capture9366.25
1p - decay-124.52
2p - decay-2498.03
1n - decay-8581.01
2n - decay-19185.42
2β- - decay-17119.93
β-,n-16820.26
β-,2n-26002.56
β-,d-16178.49
β-,t-18619.10
β-,α1897.49
β-,n,α-8880.23
EC,p6592.32
EC,2p5468.28
EC,α16139.99
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 0+x keV
T1/2 = 290.00 ms
α
100%
α-energies
 
μ (nm) Q (b) E* (keV)
+3.90(5)0
+2.34(4)0+x
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.