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GENERAL: See 3 [Electromagnetic Transitions in A = 20] (in PDF or PS), 20.1 [General Table] (in PDF or PS) and 20.2 [Table of Energy Levels] (in PDF or PS) here.

1. 20O(β-)20F

Qm = 3.814

²⁰O decays with a half-life of 13.51 ± 0.05 s to the 1⁺ states ²⁰F*(1.06, 3.49) with branching ratios (99.973 ± 0.003) and (0.027 ± 0.003)%, log f₀t = 3.740 ± 0.006 and 3.65 ± 0.06, respectively (1987AL06). Upper limits for the branching to other states of ²⁰F are shown in Table II of (1987AL06). See also (1985BR29).

2. 18O(t, p)20O	Qm = 3.082
	Q0 = 3082.4 ± 1.3 keV (1985AN17). See also (1982AN12).

Observed proton groups are displayed in 20.2 (in PDF or PS) and 20.3 (in PDF or PS). ²⁰O*(4.07) decays to ²⁰O*(0, 1.67) with branchings of (26 ± 4) and (74 ± 4)%. The p-γ angular correlations lead to J = 2; the strength of the transition favors π = +, [δ(E2/M1) = -0.18 ± 0.08 for the 2⁺ → 2⁺ transition.] ²⁰O*(4.46) and ²⁰O*(5.39) decay primarily via ²⁰O*(1.67); the direct ground-state decay is < 4% for the first and < 7% for the second of these states. The angular correlations are essentially isotropic, favoring J^π = 0⁺. The transition ²⁰O*(5.39 → 4.07) is not observed: the upper limit is 8%. See also (1978AJ03, 1983AJ01). For a discussion of A = 20 isobaric states see (1982AN12, 1985AN17).

3. 18O(α, pp)20O

Qm = -16.732

See (1983AJ01).

4. 18O(18O, 16O)20O

Qm = -0.624

See (1983AJ01).