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USNDP

18N (1978AJ03)


(See the Isobar Diagram for 18N)

GENERAL: See also (1972AJ02) and Table 18.1 [Table of Energy Levels] (in PDF or PS).

See (1972GA1F, 1973TO16, 1973WI15, 1974TH01, 1975BE31, 1977AR06).
1. 18N(β-)18O Qm = 14.06

The half-life of 18N is 0.63 ± 0.03 sec (1964CH19): Eβ(max) = 9.4 ± 0.4 MeV. The decay is to 18O*(4.46), which subsequently decays via 18O*(3.63, 1.98) [see reaction 21 in 18O]. The allowed nature [log ft = 4.88] of the decay to the 1- state at 4.46 MeV leads to Jπ = 0-, 1- or 2- for the 18N ground state (1964CH19).

2. 18O(π-, γ)18N Qm = 125.51

Preliminary results show the excitation of the 18N ground state and of another group with Ex ≈ 7.5 MeV (1976TR1A).

3. 18O(n, p)18N Qm = -13.27

See (1964CH19).

4. 18O(t, 3He)18N Qm = -14.04
Q0 = -14.038 ± 0.030 MeV (1969ST07).