1961HI01: ¹⁷N; measured not abstracted; deduced nuclear properties.

1964SI06: ¹⁷N; measured not abstracted; deduced nuclear properties.

1965DO13: ¹⁷N; measured T_1/2.

1971TO08: ¹⁷N; analayzed 1st-forbidden unique β-decay data; deduced f₁t, β-moments.

1972AL42: ¹⁷N; measured T_1/2.

1973DE32: ¹⁷N(β^-); deduced β-branching.

1973PO11: 17N; measured βγ-coin, nβ(t), E_β, E_γ. Deduced β-branching, log ft. ¹⁷O deduced levels.

1976AL02: ¹⁷N; measured E_γ, I_γ, γ(t), T_1/2, delayed neutrons log ft. ¹⁷O deduced levels.

1976FI03: ¹⁷N; measured T_1/2, delayed γ, delayed neutrons.

1976OH05: ¹⁷N; measured T_1/2, β-delayed neutrons. ¹⁷O deduced levels, Γ_n.

1984IN01: ¹⁷N(β^-n); measured T_1/2, β-delayed E_n, I_n. ¹⁷O deduced possible neutron emitting level.

1991RE02: ¹⁷N(β^-n); measured T_1/2, neutron emission probabilities.

1993BU21: ¹⁷N(β^-); measured β-delayed E_α, I_α; deduced ¹²C(α, γ) reaction p-wave capture amplitude.

1994DO08: ¹⁷N(β^-); measured β-delayed E_α, I_α, 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.

2002AS06: ¹⁷C; measured β-NMR spectra; deduced μ.

2003MI01: ¹⁷N(β^-n); measured β asymmetry, β-delayed neutron spectra from spin-polarized source.

2008RIZX: ¹⁷N(β^-); measured β-delayed neutron decay.

2009DE34: ¹⁷N; measured g factors using β-NMR technique on spin-polarized fragment beams; deduced magnetic moments.

2013UE01: ¹⁷N(β^-), (β^-n); measured E_γ, I_γ, E_β, I_β, E(n) by TOF, I(n), β-NMR, βγ-, βγγ-, βnγ-coin.

Measured half-life for ¹⁷N(β^-)¹⁷O

Recommended value (July, 2015):	4.173 ± 0.004 sec;	weighted average of (1976OH05, 1972AL42)
Summary Table of Uncertainty Analysis:	(PDF)
Measured values:	4.23 ± 0.49 sec	(1991RE02)
	4.4 ± 0.2 sec	(1984IN01)
	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).

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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: 30 June 2021