Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 15-JAN-2016 

 Full ENSDF file | Adopted Levels (PDF version) 

S(n)= 23530 keV CAS(p)= -430 keV SYQ(α)= -8010 keV SY
Reference: 2012WA38,1997MO25

  A  9Be(31Ar,30Ar) 

General Comments:

30Ar identified as an unbound nucleus by 2015Mu13 in one-neutron knockout reaction.

Theoretical nuclear structure calculations: 2014Le03, 2005Pa26, 2004Ge02

Theory about 2p decay mode: 2004Pf02, 2003Gr04, 2003Gr24

Q-value: S(n) from theory (1997Mo25), S(p) and Q(α) from 2012Wa38. Estimated uncertainties (2012Wa38): 640 for S(p) and 780 for Q(α)

Q-value: S(2n)=42000 (theory,1997Mo25). S(2p)=-2250 +150-100 (2015Mu13). Other S(2p)=-2840 530 (2012Wa38)

XREFJπ(level) T1/2(level)
  0A 0+ < 10 ps
% 2p = 100
  0.7E3A (2+) % p = 100

Jπ(level): From analogy with mirror states in 30Mg

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Additional Level Data and Comments:

  00+ < 10 ps
% 2p = 100
From analysis of proton distribution spectrum from 2p decays of 30Ar, 2015Mu13 conclude that the process is a combination of the two decay processes: "true " or simultaneous 2p emission, and sequential 1p emissions.
  0.7E3(2+) % p = 100
This state decays by two branches of sequential 1p emissions via the lowest states in 29Cl, finally to the ground state and first excited 2+ state in 28S (2015Mu13).

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