| Recommended value (July, 2015): | 0.619 ± 0.002 sec | (2005LI60) |
| Summary Table of Uncertainty Analysis: |  (PDF) |
|
| Measured values: | 0.620 ± 0.008 sec | (2007BU01) |
| 0.625 ± 0.030 sec | (2007LO05) | |
| 0.635 ± 0.040 sec | (2007LO05) | |
| 0.609 ± 0.060 sec | (2007LO05) | |
| 0.619 ± 0.002 sec | (2005LI60) | |
| 0.63 ± 0.02 sec | (1994SC01) | |
| 0.658 ± 0.044 sec | (1994RE1R: see also 790 ± 210 ms in (1991RE02) and 660 ± 35 ms in the | |
| unpublished private communications of (2008REZZ)/(1995REZZ).) (Excluded) | ||
| 0.624 ± 0.012 sec | (1982OL01) | |
| 0.63 ± 0.03 sec | (1964CH19) | |
| Other Reviews: | 0.619 ± 0.002 sec | (2015BI05) |
| Decay to 18O* (keV) |
Decay mode |
Jπ | Branching Ratio (%) a | log ft | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| (1982OL01) | (1989ZH04) | (1994SC01) | (2005LI60) | (1982OL01) | (1989ZH04) | (1994SC01) | (2005LI60) | |||
| 1982.05 ± 0.09 b | γ | 2+ | 3.9 ± 1.5 | 6.75 ± 0.30 | ||||||
| 3554.13 ± 0.80 | γ | 4+ | < 0.6 | > 7.27 | ||||||
| 3633.70 ± 0.11 | γ | 0+ | < 0.35 | > 7.50 | ||||||
| 3920.42 ± 0.14 | γ | 2+ | < 0.43 | > 7.35 | ||||||
| 4455.52 ± 0.10 | γ | 1- | 54.6 ± 1.1 | 5.146 ± 0.054 | ||||||
| 5097.60 ± 0.60 | γ | 3- | < 0.43 | > 7.09 | ||||||
| 5530.17 ± 0.32 | γ | 2- | 3.1 ± 0.4 | 6.15 ± 0.07 | ||||||
| 6198.22 ± 0.40 | γ | 1- | 1.4 ± 0.2 | 6.33 ± 0.08 | ||||||
| 6349.76 ± 1.0 | γ | (2-) | 2.2 ± 0.3 | 6.09 ± 0.08 | ||||||
| 6880.45 ± 0.27 | γ | 0- c | 14.8 ± 0.8 | 5.118 ± 0.070 | ||||||
| 7620 | α | 1- | 6.8 ± 0.5 | 5.21 d | ||||||
| 7771.07 ± 0.50 | γ | 2- c | 5.0 ± 0.5 | 5.32 ± 0.09 | ||||||
| 8040 | α | 1- | 1.8 ± 0.2 | 5.65 d | ||||||
| 8660 ± 20 | n | (0 - 2)- | 5.04 ± 1.12 | 4.87 ± 0.10 | ||||||
| 8890 ± 40 | n | (0 - 2)- | 0.28 ± 0.06 | 6.08 ± 0.09 | ||||||
| 9000 e | α | (1-) | ≥ 3.6 ± 0.2 | d | ||||||
| (9090 ± 30) f | n | (0 - 2)- | 0.16 ± 0.03 | 0.11 ± 0.03 | 6.27 ± 0.09 | 6.41 ± 0.12 | ||||
| 9270 ± 20 f | n | (0 - 2)- | 0.39 ± 0.09 | 0.18 ± 0.03 | 5.81 ± 0.12 | 6.11 ± 0.07 | ||||
| 9470 ± 20 f | n | (0 - 2)- | 0.47 ± 0.09 | 0.24 ± 0.04 | 5.64 ± 0.09 | 5.90 ± 0.07 | ||||
| 9690 ± 20 f | n | (0 - 2)- | 0.14 ± 0.03 | 0.05 ± 0.02 | 6.07 ± 0.10 | 6.51 ± 0.17 | ||||
| 9910 ± 20 f | n | (0 - 2)- | 0.17 ± 0.03 | 0.18 ± 0.02 | 5.88 ± 0.08 | 5.86 ± 0.05 | ||||
| 10240 ± 30 f | n | (0 - 2)- | 0.16 ± 0.03 | 0.11 ± 0.03 | 5.75 ± 0.09 | 5.96 ± 0.12 | ||||
| 10650 ± 30 f | n | (0 - 2)- | 0.43 ± 0.09 | 0.43 ± 0.06 | 5.08 ± 0.10 | 5.12 ± 0.06 | ||||
| 10990 ± 30 f | n | (0 - 2)- | 0.13 ± 0.03 | 0.13 ± 0.02 | 5.39 ± 0.10 | 5.54 ± 0.07 | ||||
| 11490 ± 30 f | n | (0 - 2)- | 0.19 ± 0.04 | 0.23 ± 0.03 | 4.85 ± 0.10 | 4.91 ± 0.06 | ||||
| 12050 ± 50 h | n | (1)- | 0.05 ± 0.03 | 5.24 ± 0.03 | ||||||
| Total BR for the β-delay neutron decay listed | 2.2 ± 0.4 g | 7.03 ± 1.46 | ||||||||
| a) 12.2 ± 0.6 % of the β-decay branching ratio has been measured to feed α-emitting states (1989ZH04). 14.3 ± 2.0 % has been measured to feed n-decaying states (1991RE02). The branching ratio of γ-decaying states (1982OL01) have been renormalized to take these values into account. See reaction 22 of 18O in (1995TI07). Branchings in this table do not add up to 100% since n-decaying levels below 9.00 MeV were not measured by (1994SC01) and there is a missing 12.1% branching to n-decaying levels not listed. |
| b) Eγ = 1981.933 ± 0.09 keV is adopted by (1982OL01). |
| c) See (1982OL01). |
| d) log ft = 5.17 ± 0.04, 5.61 ± 0.05, and ≤ 5.0 for 18O*(7620, 8040, 9000), respectively: see (1995TI07). |
| e) Found as a broad bump at 3 MeV in β-delayed alpha spectrum. Could be several unresolved 1- states or a new broad 1- state in 18O (1989ZH04). |
| f) Ex(18O) = (9070 ± 20, 9280 ± 30, 9470 ± 30, 9610 ± 30, 9890 ± 30, 10140 ± 40, 10630 ± 40, 10900 ± 40, and 11450 ± 50), respectively (2005LI60). |
| g) The common errors of the total efficiency (10%) and the uncertainty of the shape of the background (15%) have been added after the summing (1994SC01). |
| h) From (2007LO05). |
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Last modified: 30 June 2021