17N

β--Decay Evaluated Data



Measurements
1961HI01: 17N; measured not abstracted; deduced nuclear properties.
1964SI06: 17N; measured not abstracted; deduced nuclear properties.
1965DO13: 17N; measured T1/2.
1971TO08: 17N; analayzed 1st-forbidden unique β-decay data; deduced f1t, β-moments.
1972AL42: 17N; measured T1/2.
1973DE32: 17N(β-); deduced β-branching.
1973PO11: 17N; measured βγ-coin, nβ(t), Eβ, Eγ. Deduced β-branching, log ft. 17O deduced levels.
1976AL02: 17N; measured Eγ, Iγ, γ(t), T1/2, delayed neutrons log ft. 17O deduced levels.
1976FI03: 17N; measured T1/2, delayed γ, delayed neutrons.
1976OH05: 17N; measured T1/2, β-delayed neutrons. 17O deduced levels, Γn.
1984IN01: 17N(β-n); measured T1/2, β-delayed En, In. 17O deduced possible neutron emitting level.
1991RE02: 17N(β-n); measured T1/2, neutron emission probabilities.
1993BU21: 17N(β-); measured β-delayed Eα, Iα; deduced 12C(α, γ) reaction p-wave capture amplitude.
1994DO08: 17N(β-); measured β-delayed Eα, Iα, α(13C)-coin; deduced log ft, total βα-branching ratio. 17O deduced levels contributing to α-decay.
1996UE02, 1996UEZZ: 17N(β-); measured NMR; deduced μ.
2000BU33: 17N(β-n); measured β-delayed neutron spectra.
2001GR06: 17N(β-n); measured β-delayed neutron spectra. 16N deduced level, J, π.
2003MI01: 17N(β-n); measured β asymmetry, β-delayed neutron spectra from spin-polarized source.
Measured half-life for 17N(β-)17O

Recommended value (July, 2015): 4.173 ± 0.004 sec; mean value of (1976OH05, 1972AL42)
Summary Table of Uncertainty Analysis:  Table 17N preview (PDF)  
Measured values: 4.23 ± 0.49 sec (1991RE02)
4.174 ± 0.004 sec (1976OH05)
4.15 ± 0.10 sec (1976FI03)
4.169 ± 0.008 sec (1972AL42)
4.17 ± 0.02 sec (1970ME31)
4.16 ± 0.01 sec (1965DO13)
4.20 ± 0.08 sec (1961HI01)
4.16 ± 0.15 sec (1956FA1C)
4.15 ± 0.10 sec (1951ST1E)
4.14 ± 0.04 sec (1948KN24)
Other Reviews: 4.171 ± 0.004 sec (2015BI05)

Previous Measurements

 

Decay to
17O* (MeV)
Jπ Branching Ratio (%) log ft
(1964SI06) a (1973DE32) (1973PO11) (1976AL02) b (1976OH05) (1964SI06) c (1976AL02) (1976OH05)
0 5/2+ 1.6 ± 0.5   1.7 ± 0.5     9.56 ± 0.13 d   7.29 ± 0.11 i  
  871 1/2+ 2.6 ± 0.5   2.9 ± 0.5 3.0 ± 0.5   6.8 ± 0.1     6.80 ± 0.07    
3055.2 ± 0.3 e    1/2- 0.46 ± 0.11   0.54 ± 0.08 0.34 ± 0.06   6.9 ± 0.1     7.08 ± 0.08    
3841 5/2- < 0.1     < 7 x 10-3   > 7.4   > 8.5  
4551.2 ± 1.3 f    3/2- ≈ 95 27 ± 3 37.9 ± 1.8   39.2 ± 2.0   38.0 ± 1.3 g   4.41 ± 0.02 4.40 ± 0.02    
5083 ± 21 f  3/2+       0.6 ± 0.4        5.9 ± 0.5
5389.0 ± 1.2 f, h 3/2- 57 ± 4 51.1 ± 1.5   48.0 ± 1.5   50.1 ± 1.3 g   3.86 ± 0.02 3.88 ± 0.02    
5738 (1/2+)       < 0.23       > 6.0
5868 3/2+       < 0.15       > 6.0
5951.8 ± 1.9 f, h 1/2- 11 ± 2 5.8 ± 0.6 7.9 ± 0.7   6.9 ± 0.5 g   4.35 ± 0.03 4.31 ± 0.04    
6356 1/2+       < 0.08       > 6.0
a) and J.C. Hopkins, private communication to Fay Ajzenberg-Selove (1971AJ02).
b) Adopted.
c) Calculated using the tables of (1971GO40)
d) log f1t: E.K. Warburton, private communication to Fay Ajzenberg-Selove (1971AJ02) and (1971TO08).
e) Direct ground-state decay < 1.5% (1976AL02).
f) From neutron groups. [The Ex were calculated on the basis of 4144.3 ± 0.8 keV for Eb for a neutron in 17O.] Γn for 17O*(4.55, 5.08, 5.38, 5.94) are, respectively, 54.8 ± 0.4, 113 ± 55, 63.2 ± 1.1 and 60.5 ± 3.2 keV. See also Table 17.17 in (1993TI07).
g) Calculated from the mean of the values from (1973PO11, 1976AL02, 1976OH05), renormalized here, together with the new branch to 17O*(5.08), to lead to a total neutron emission probability of 95 ± 1 % [100% less the branches to 17O*(0, 0.87, 3.06)].
h) See, however, Tables 17.10 and 17.17 in (1993TI07).
i) log f1t = 9.56 ± 0.13 (1971TO08).

17B(β-)17C Evaluated Data

17C(β-)17N Evaluated Data

17F(β+)17O Evaluated Data

17Ne(β+)17F Evaluated Data

A = 17 Beta-Decays Diagram

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Last modified: 21 May 2018