Authors: J.E. Purcell, C.G. Sheu |  Citation: ENSDF |  Cutoff date: 13-Aug-2018 

 Full ENSDF file | Adopted Levels (PDF version) 

S(p)= -100 keV 30
Reference: 2017WA10

  A  9Be(9C,8C)  B  12C(α,8He)
  C  14N(3He,9Li) 

General Comments:

The atomic mass excess of 8C is given as 35064 keV 18 in (2017Wa10). Using this mass excess value, the binding energy of 8C is 24.812 MeV 18. In some of the theoretical articles referenced below, this is the quantity that is calculated. Sometimes the binding energy is given relative to the 4He+4p threshold which is 3.483 MeV 18. 8C is unstable with respect to single proton decay, Q=98 keV, 2 proton decay, Q=2111 keV, 3 proton decay, Q=1517 keV and 4 proton decay, Q=3483 keV. Results reported in (2010Ch42) indicate that 8C decays by emitting two pairs of protons-8C|)6Be+2p|)(4He+2p)+2p. Also see (2011ChZW). For theoretical studies that include 8C see (1974Ir04, 1987Bl18, 1987Sa15, 1988Co15, 1996Gr21, 1996Su24, 1997Ba54, 1997Po12, 1998Wi10, 1999Ha61, 2000Wi09, 2001Co21, 2002Ba90, 2003Ba99, 2006Sa29, 2006Wi07, 2007Ma79, 2009Ba41, 2011ChZW, 2012My02, 2012My04, 2014Eb02, 2014Mi17, 2014My03). IMME studies including α=8 are reported in (1974Ro17, 1976Tr01, 1984An18, 1998Br09, 2011Ch53, 2013La29). Calculations of the 8C rms radii are reported in (2017Ka45).

XREFJπ(level) T1/2(level)
  0ABC 0+ 130 keV 50 
% 2p = 100

T1/2(level): LABEL=Γ

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Additional Level Data and Comments:


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