Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21487Fr127   Francium
J(π)=(1-)
T1/2=5.00 ms
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -0.958197
(0.008647)		 -0.950 -6.170
BE 1660.156 1660.148
BE/A 7.758 7.758
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= -0.010
β3= 0.000
β4= 0.012
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 - decay8588.56
β- - decay-1051.06
β+ - decay2339.15
e-capture3361.15
1p - decay-2549.31
2p - decay-6908.41
1n - decay-5476.82
2n - decay-13585.01
2β- - decay-7402.66
β-,n-9387.40
β-,2n-16902.09
β-,d-10578.08
β-,t-11768.14
β-,α6221.47
β-,n,α-2525.54
EC,p-1668.07
EC,2p-5167.19
EC,α12569.56
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 122 keV
T1/2 = 3.35 ms
α
100%
α-energies
 
μ (nm) Q (b) E* (keV)
2.2(5)6477+D’
0.8(2)640
+5.62(7)K,d640
+8.5(4)K,d1663or1734
+19.7(8)K,d4318+D
+22(3)6477+D'
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.