Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21993Np126   Neptunium
J(π)=
T1/2=5.00 µs
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 29.277
(0.196)		 28.880 -2.530
BE 1665.584 1665.981
BE/A 7.605 7.607
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= 0.000
β3= -0.013
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 - decay8983.32
β- - decay-7309.96
β+ - decay4968.42
e-capture5990.42
1p - decay76.03
2p - decay-2370.97
1n - decay-9541.30
2n - decay-17822.60
2β- - decay-16009.93
β-,n-15651.26
β-,2n-25922.56
β-,d-14815.66
β-,t-18419.76
β-,α1875.14
β-,n,α-6676.16
EC,p3303.52
EC,2p2480.84
EC,α15930.51
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
       
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.