Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
23091Pa139   Protactinium
J(π)=2-
T1/2=17.40 d
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 32.174778
(0.003262)		 32.660 -0.730
BE 1753.035 1752.550
BE/A 7.622 7.620
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= 0.185
β3= 0.000
β4= 0.126
β6= 0.024
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay5439.39
β- - decay559.82
β+ - decay288.50
e-capture1310.50
1p - decay-4701.00
2p - decay-11299.61
1n - decay-5794.90
2n - decay-12892.27
2β- - decay-3061.64
β-,n-7107.39
β-,2n-13190.14
β-,d-9885.33
β-,t-9607.00
β-,α6552.56
β-,n,α-631.94
EC,p-5812.47
EC,2p-11345.45
EC,α6080.27
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 17763 keV
T1/2 = 0.210 MeV
p
56%
α-energies
β- endpoint energies
γ-energies
σ (b)
Fission 1500.00
 
μ (nm) Q (b) E* (keV)
2.0(2)0
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.