Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21387Fr126   Francium
J(π)=9/2-
T1/2=34.82 s
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -3.55268
(0.005096)		 -3.650 -7.120
BE 1654.679 1654.777
BE/A 7.768 7.769
<R2ch>1/2 = 5.5986 ± 0.0176 fm [3]
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 - decay6904.78
β- - decay-3910.58
β+ - decay1123.17
e-capture2145.17
1p - decay-2182.44
2p - decay-6483.85
1n - decay-8108.20
2n - decay-15555.46
2β- - decay-9708.87
β-,n-11425.27
β-,2n-20527.27
β-,d-12548.53
β-,t-15169.94
β-,α2951.28
β-,n,α-4393.62
EC,p-2213.93
EC,2p-5698.59
EC,α10387.96
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
α-energies
 
μ (nm) Q (b) E* (keV)
(-)2.2(5)8095
[-0.70(7)]2538
-0.14(2)0
+4.02(8)0
7.5(14)1411
9.4(2)1590
9.32(3)1590
+15.30(7)2538
15.23(14)2538
15.22(3)2538
23.2(7)4993
22.3(6)4993
+22.6(2)8095
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.