19O

β--Decay Evaluated Data

Measurements
1947BL33: 19O.
1954JO21: 19O.
1959AL06: 19O.
1959JO26: 19O.
1962MA38: 19O; measured not abstracted; deduced nuclear properties.
1965BO42: 19O; measured T1/2.
1966OL01: 19O; measured not abstracted; deduced nuclear properties.
1967YU01: 19O; measured T1/2.
1970AL21: 19O; measured T1/2.
1970CO22: 19O; measured βγ-coin; deduced log ft, β-branching, Iβ.
1971TO08: 19O; analayzed 1st-forbidden unique β-decay data; deduced f1t, β-moments.
1978PE14: 19O; measured βγ(θ); deduced allowed β-decay matrix element. 19F level deduced isospin mixing.
1980ALZR: 19O(β-); measured T1/2, Eβ, Iβ, Eγ, Iγ, βγ-coin.
1982OL02: 19O; measured Eγ, Iγ; deduced log ft. 19F levels deduced Iβ, γ-branching.
1986AL11: 19O(β-); measured T1/2.
1995ITZY: 19O(β-); measured decay products, Eγ, Iγ; deduced T1/2.
1996MAZU, 1999MI16: 19O(β-); measured β-NMR spectra. 19O deduced μ, Q.
1999SA75: 19O(β-); measured β-NQR spectrum in TiO2, MgF2. 19O deduced quadrupole moments.
2001ZH43: 19O(β-); measured Eγ, Iγ(θ, H, t). 19F deduced quadrupole moment.
2002ZH23: 19O(β-); measured Eγ, Iγ, γγ-coin from aligned nuclei implanted in Cd. 19F deduced quadrupole moment.
2003SA04: 19O(β-); measured Eγ, Iγ(θ, H, t), γγ-coin. 19F transitions deduced angular correlation coefficients for different implantation media.
2012UJ01, 2013UJ01: 19O(β-); measured decay products; deduced T1/2, branching ratios and uncertainties, lack of electron screening effects.
Measured half-life for 19O(β-)19F

Recommended value (August, 2015): 26.470 ± 0.018 sec
Summary Table of Uncertainty Analysis: Table 19O preview (PDF)  
Measured values: 26.476 ± 0.009 sec (2013UJ01)
26.464 ± 0.009 sec (1995ITZY)
27.03 ± 0.07 sec (1986AL11)
27.1 ± 0.1 sec (1970AL21)
26.76 ± 0.08 sec (1967YU01)
27.2 ± 0.3 sec (1965BO42)
29.12 ± 0.26 sec (1962MA38)
Previous Measurements

 
Decay to 19F* a
(keV)		 Jπ Branching Ratio b
(%)		 log ft References Eγ (keV) c → Ef (keV) Iγ c
0 1/2+ ≤ 4        ≥ 6.5 (1959AL06, 1959JO26)      
  110 1/2- 0.048+0.012-0.033 10.16+0.51-0.10 d (1970CO22)       109.894 ± 0.005 e → 0     2.54 ± 0.10
0.055+0.013-0.038 8.34+0.30-0.10 (1982OL02)
197.143 ± 0.004 5/2+ 41.5+2-5   5.42+0.06-0.03 f (1959AL06)       197.142 ± 0.004 g → 0     95.9 ± 2.1  
45.4 ± 1.5   5.384 ± 0.014 (1982OL02)
30 ± 10 5.55 h (1947BL33, 1954JO21)
1346 5/2-   ≥ 7.1 (1959JO26) 1149 → 197 0.0005 i
0.017 ± 0.002 8.25 ± 0.05 (1982OL02) 1236 → 110 0.017 ± 0.002
1459 3/2-   ≥ 6.7 (1959JO26)      
< 0.010 > 8.4 (1982OL02)
1554.038 ± 0.009 j 3/2+ 58.5 ± 2        4.59 ± 0.03 f (1959AL06) 1356.843 ± 0.008 → 197 50.4 ± 1.1  
54.4 ± 1.2   4.625 ± 0.010 (1982OL02) 1444.085 ± 0.010 → 110 2.64 ± 0.06
70 4.33 h (1947BL33, 1954JO21) 1533.970 ± 0.008 → 0     1.39 ± 0.03
2779.849 ± 0.034   9/2+ ≤ 0.15   > 7.4 (1959AL06, 1966OL01) 2582.517 ± 0.033 → 197 (1.89 ± 0.05) × 10-2
< 0.002 > 8.2 (1982OL02)
3908.17 ± 0.20   3/2+ 0.0081 ± 0.0005 6.133 ± 0.027 2353.98 ± 0.26   → 1554 (1.81 ± 0.23) × 10-3
3710.64 ± 0.20 → 197 (1.10 ± 0.15) × 10-3
3797.87 ± 0.20 → 110 (1.33 ± 0.14) × 10-3
3907.74 ± 0.20 → 0     (3.84 ± 0.17) × 10-3
3999 7/2- < 0.001 > 6.9      
4033 9/2- < 0.001 > 6.8      
4377.700 ± 0.042   7/2+   0.16 ± 0.012 3.60 f (1966OL01) 1597.780 ± 0.025   → 2780 (1.92 ± 0.05) × 10-2
0.0984 ± 0.0030 3.859 ± 0.017 (1982OL02) 4180.063 ± 0.041 → 197 (7.92 ± 0.17) × 10-2
4550 5/2+ < 0.001 > 5.1      
a) Ex shown with uncertainties were determined by (1982OL02).
b) β-branches and log ft's from (1982OL02) are calculated assuming 0% for the 19O(β-)19F ground-state transition.
c) (1982OL02). γ-ray intensities are per 100 parent decays assuming 0% β-branch to the ground state.
d) log f1t. See also (1971TO08).
e) Eγ = 111.5 ± 1.5 keV (1954JO21), 112 ± 2 keV (1959JO26).
f) Based on Qm and T1/2 = 26.91 ± 0.08 sec: see 19O, reaction 1 in (1972AJ02) (B.A. Zimmerman, private communication to Fay Ajzenberg-Selove).
g) Eγ = 199.6 ± 1.5 keV (1954JO21).
h) From (1951FE1A).
i) Calculated assuming previously measured branching ratios.
j) Ex = 1553.9 ± 1.3 keV (1966AL12).
19B(β-)19C Evaluated Data

19C(β-)19N Evaluated Data

19N(β-)19O Evaluated Data

19Ne(β+)19F Evaluated Data

A = 19 Beta-Decays Diagram

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Last modified: 30 June 2021