1959EL41: ¹⁶N; measured T_1/2.

1962MA38: ¹⁶N; measured not abstracted; deduced nuclear properties.

1964BI02: ¹⁶N; measured not abstracted; deduced nuclear properties.

1965GR21: ¹⁶N; measured T_1/2.

1966SC05: ¹⁶N; measured T_1/2.

1969HA42: ¹⁶N; measured E_α, I_α; deduced I_β, log ft. ¹⁶O levels deduced α-width.

1970AL21: ¹⁶N; measured T_1/2.

1970JO25: ¹⁶N; measured β-delayed α-spectrum. ¹⁶O level deduced no parity-forbidden α-decay.

1974NE10: ¹⁶N; measured E_α, I_α, I_γ; deduced β-branching. ¹⁶O level deduced α-width, parity non-conserving α-decay.

1982GA05, 1982GAZO: ¹⁶N; measured E_β, E_γ, I_γ, β-decay rate; deduced pseudoscalar, axial vector coupling constant ratio, pion exchange current evidence.

1982GAZP: ¹⁶N(β^-); measured β decay rate, branching ratio; deduced induced pseudoscalar coupling constants, meson exchange currents.

1983GA18: ¹⁶N(β^-); measured E_γ, I_γ, E_β, I_β, β-decay rate vs t; deduced (gp/g(A)). ¹⁶N level deduced β-decay probability. ¹⁶O levels deduced I_β.

1983MI20: ¹⁶N(β^-); measured β-, γ-time spectra, relative γ yield; deduced β-decay rate Wβ, Wβ/Wμ, g(p)/g(A).

1984HA56: ¹⁶N(β^-); measured β-spectra. ¹⁶O level deduced branching ratio (λβ/λγ).

1985HA22: ¹⁶N(β^-); measured E_β, I_β, E_γ, I_γ; deduced g(p)/g(A), β-decay rate.

1985HE08: ¹⁶N(β^-); measured βγ-coin. ¹⁶N level deduced β-decay rate. ¹⁶O levels deduced β-decay branching ratio.

1986JI02: ¹⁶N(β^-); measured E_γ, I_γ; deduced response function.

1987OZZZ: ^16mN(β^-); measured T_1/2, γ(t).

1988CH30: ¹⁶N(β^-); measured β-spectrum.

1990FUZR: ¹⁶N(β^-); measured E_β, I_β, E_γ, I_β; deduced β/γ ratio for 0^- level decay in ¹⁶N.

1991TAZS: ¹⁶N(β^-), (α); measured E_β, I_β.

1992BUZY: ¹⁶N(β^-); measured β-delayed E_α, I_α, α¹²C-coin; deduced implications to astrophysically relevant ¹²C(α, γ) reaction.

1993BU03, 1993BU18, 1993BU21: ¹⁶N(β^-); measured β-delayed E_α, I_α, α(¹²C)-coin; deduced E1 part of ¹²C(α, γ) reaction, astrophysical S-factor.

1993ZH06: ¹⁶N(β^-); measured β-delayed E_α, I_α; deduced p-wave astrophysical S-factor for ¹²C(α, γ) reaction, astrophysical implications.

1993ZH13: ¹⁶N(β^-); measured β-delayed E_α, I_α, E_γ, I_γ; deduced ¹²C(α, γ) reaction, massive stars helium burning process implications. ¹⁶O level deduced β-decay branching ratio.

1994AZ03, 1995AZZY: ¹⁶N(β^-); measured β-delayed α-spectrum, (α)(¹²C)-coin; deduced R-matrix, K-matrix level parameters relevant to ¹²C(α, γ) reaction.

1994MIZU: ¹⁶N(β^-); measured E_β, γ(t). ¹⁶N deduced levels, E_β, β-ray branchings, T_1/2.

1995BA50: ¹⁶N(β^-); analyzed β-delayed α-decay data; deduced improved E1 α-capture σ for ¹²C.

1995FUZZ: ¹⁶N(β^-); measured E_β, I_β(t), γ time spectra, T_1/2, β decay rate of ¹⁶N(0^-) state. ¹⁶O levels deduced β-branching.

1995ITZY: ¹⁶N(β^-); measured decay products, E_γ, I_γ; deduced average T_1/2.

1996DR09: ¹⁶N(β^-); measured average T_1/2.

1997BE40: ¹⁶N(β^-); measured βγ-coin, T_1/2.

1997FR12: ¹⁶N(β^-); measured β-delayed α spectra.

1997HU16: ¹⁶N(β^-); measured E_γ, I_γ.

1998GA20: ¹⁶N(β^-); measured β-delayed α spectra. Comparison with previous data, calculations.

1999KIZV: ¹⁶N(β^-); measured I_β, I_γ; deduced β-decay branching ratio.

1999MIZX, 2000MIZR, 2001MA42, 2001MB06: ¹⁶N(β^-); measured β-NMR asymmetry; deduced μ, quadrupole moment.

2001BL01: ¹⁶N(β^-); measured E_β.

2002DR03: ¹⁶N(β^-); measured E_γ, I_γ.

2002MAZW: ¹⁶N(β^-); measured E_β, β-NMR and β-NQR spectra from oriented nuclei. ¹⁶N deduced μ, quadrupole moment.

2004TAZW, 2005TAZR: ¹⁶N(β^-); measured β-delayed E_α, (¹²C)α-coin.

2007FR11: ¹⁶N(β^-); measured delayed α spectrum

2007RE17: ¹⁶N(β^-); measured E_α, I_α, (particle)α-coin; deduced astrophysical S-factor.

2007TA34: ¹⁶N(β^-), (β^-α); measured E_α, I_α, ¹²Cα-coin. ¹²C(α, γ); deduced astrophysical S-factor.

2009BU12: ¹⁶N(β^-), (β^-α); analyzed β-delayed α-spectra from previous experiments at Yale, Triumf, Argonne, Seattle and Mainz using GEANT4 simulations and R-matrix analysis; deduced E1 fraction of the ground-statetransition in ¹²C(α, γ)¹⁶O reaction of astrophysical importance.

2010TA05: ¹⁶N(β^-α); measured E_α, I_α, α¹²C-coin, half-life.

2013UE01: ¹⁶N(β^-); measured E_γ, I_γ, E_β, I_β, E(n) by TOF, I(n), β-NMR, βγ-, βγγ-, βnγ-coin.

2015CHZZ: ¹⁶N(β^-α); measured T_1/2, branching ratios; deduced S_E1.

2015YAZV: ¹⁶N(β^-); measured β-delayed α-decay (via 9.585 MeV excited state in ¹⁶O) at CRIB; deduced order of magnitude for β-decay branching ratio.

2016RE01: ¹⁶N(β^-α); measured decay products, E_α, I_α, E_β, I_β; deduced βα branching ratio and its uncertainties, impact on S-factor. Comparison with available data.

2018KI12: ¹⁶N(β^-α); measured decay products, E_β, I_β, E_α, I_α, E_γ, I_γ; deduced he first accurate normalization of the β-delayed α spectrum of ¹⁶N and resolved a discrepancy between two previous high-precision measurements of the spectral shape, branching ratio, constrain on E1 capture σ.

2021AN03: ¹⁶N(β^-), (β^-α); analyzed available data; deduced fitting parameters, β delayed α emission from ¹⁶N as a function of the α energy.

Measured half-life for ¹⁶N(β^-)¹⁶O

Recommended value (August, 2015):	7.13 ± 0.02 sec
Summary Table of Uncertainty Analysis:	(PDF)
Measured values:	7.09 ± 0.08 sec	(1996DR09)
	7.10 ± 0.05 sec	(1996DR09)
	7.13 ± 0.03 sec	(1995ITZY)
	7.13 ± 0.04 sec	(1970AL21)
	7.10 ± 0.03 sec	(1966SC05)
	7.16 ± 0.04 sec	(1965GR21)
	7.14 ± 0.02 sec	(1964BI02)
	7.31 ± 0.04 sec	(1962MA38) (Excluded)
	7.352 ± 0.009 sec	(1959EL41) (Excluded)
	7.38 ± 0.05 sec	(1954MA1B) (Excluded)
	7.35 ± 0.05 sec	(1947BL1A) (Excluded)

Previous Measurements

 

Decay to 16O* (MeV)	Jπ	Branching Ratio (%)								log f0t						Eβ(max) (MeV)
		A	B	C	(1961KA06)	(1968WA18)	(1969HA42)	(1984WA07)	(1985HE08)	A	B	C	(1968WA18)	(1984WA07)	(1971TO08)	(1957MO1A)	(1958BR95)
0	0+	26 ± 2	24 ± 2	28				27.9 ± 0.5 a	28.1 ± 0.64 b	6.7	8.2 c	6.67 d	9.11 ± 0.04 c, e	9.069 ± 0.005 c	9.10 ± 0.04 c	10.33 ± 0.08	10.40 ± 0.05
6.05	0+	≤ 0.015				(1.2 ± 0.4) x 10-2				≥ 8.2			9.97 ± 0.15 c		9.96 ± 0.15 c	Eγ(16O* → 16O(0)) (keV)
6.13	3-	68 ± 2	55 ± 4	54				66.2 ± 0.6 f		4.5	4.5	4.6		4.48 ± 0.04	4.47 g	(1951MI1B)	6133 ± 11
																(1975SH18)	6129.170 ± 0.043
																(1982SH23)	6129.142 ± 0.032
																(1986KE15)	6129.119 ± 0.04
7.12	1-	4.9 ± 0.4	21 ± 4	18				4.8 ± 0.4		5.1	4.4	4.6		5.11 ± 0.04	5.09 g	(1951MI1B)	7100 ± 20
																(1976AL16)	7115.15 ± 0.14
8.87	2-	1.0 ± 0.2						1.06 ± 0.07 h		4.4				4.41 ± 0.03 h	4.37 g
9.59	1-				(1.20 ± 0.05) x 10-3									6.12 ± 0.05	6.21 g
9.84	2+						(6.5 ± 2.0) x 10-7							9.07 ± 0.13 c

A: (1956WI1A, 1958AL13, 1959AL06).

B: (1957MO1A).

C: (1958BR95)

a We adopt 28.0 ± 0.5, the average of (1984WA07, 1985HE08): see (1993TI07).

b "Best" value is (28.0 ± 0.4)%.

c log f1t value.

d log f1t = 8.0.

e E.K. Warburton, private communication to Fay Ajzenberg-Selovelog (1971AJ02).

f Recalculated so that the sum of the branches = 100%.

g B. Zimmerman, private communication to Fay Ajzenberg-Selovelog (1971AJ02).

h E.K. Warburton, private communication to Fay Ajzenberg-Selovelog (1986AJ04).

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A = 16 Beta-Decays Diagram

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Last modified: 23 June 2021