1986CU01, 1986HAYX, 1987MIZU: ¹⁴Be(β^-); measured β-decay T_1/2.

1987DUZU: ¹⁴Be; measured β-delayed neutron multiplicities.

1988DU09: ¹⁴Be(β^-n); measured β-delayed neutron spectra; deduced T_1/2, multi-neutron branching ratios.

1988DUZT: ¹⁴Be(β^-n); measured β-delayed xn emission, associated multiplicity, x = 0-4, T_1/2 for ¹⁴Be.

1994KIZY, 1995AOZZ, 1995BE25, 1996AOZX: ¹⁴Be(β^-); measured β-delayed neutron spectra, βn-coin, E_γ, I_γ; deduced log ft, branching ratios. ¹⁴B deduced β-decay T_1/2, possible level.

1994RE1R, 1991RE02: ¹⁴Be(β^-n); measured T_1/2, neutron emission probabilities.

1997AO01: ¹⁴Be(β^-); measured βnγ-coin; deduced log ft. ¹¹Be, ¹⁴B deduced levels, Gamow-Teller branchings.

1997AO04: ¹⁴Be(β^-); measured beta-delayed neutron-, γ-spectra, γγγ-coin; deduced log ft, halo neutron related features. ¹⁴B deduced levels. Tof.

1997BE66: ¹⁴Be(β^-); measured β-delayed neutron spectra, β(neutron)-coin, T_1/2. ¹⁴B deduced level, possible J, π.

1998KOZP: ¹⁴Be(β^-n); measured decay products, E_β, I_β, E_n, I_n; deduced T_1/2, neutron emission probability.

1999BE53: ¹⁴Be(β^-); measured β-delayed neutrons, βn and nn time correlations. ¹⁴Be deduced neutron emission probabilities, branching ratios.

2002AO03: ¹⁴Be(β^-), (β^-n); measured E_β, β-delayed E_n, E_γ, nγ-coin, T_1/2; deduced branching ratios, log ft. ¹⁴B deduced level J, π, width.

2002BE53: ¹⁴Be(β^-); measured β-delayed neutrons, charged particles; deduced decay branching ratios.

2002JE11: ¹⁴Be(β^-); measured β-delayed charged particle spectra, branching ratios, β-delayed neutron spectra.

2002JE14: ¹⁴Be(β^-); measured β-delayed triton and α spectra; deduced branching ratios, Gamow-Teller strength distribution.

2003FO11: ¹⁴Be; analyzed β-delayed neutron decay data; deduced ground-state configuration features.

Measured half-life for ¹⁴Be(β^-)¹⁴B

Recommended value (August, 2015):	4.65 ± 0.20 ms	(Weighted Average with uncertainty doubled)
Summary Table of Uncertainty Analysis:	(PDF)
Measured values:	4.84 ± 0.10 ms	(2002AO03)
	4.29 ± 0.18 ms	(1997BE66)
	4.8 ± 0.2 ms	(1994RE1R: see also (1991RE02) and 4.78 ± 0.19 ms in the unpublished
		private communications of (2008REZZ)/(1995REZZ).)
	4.0 ± 1.2 ms	(from β-n coincidence data); 4.8 ± 0.2 ± 0.4 ms (from β-decay curve) (1995BE25)
	4.35 ± 0.17 ms	(1988DU09)
	4.2 ± 0.7 ms	(1986CU01)
Other Reviews:	4.53 ± 0.27 ms	(2015BI05)

Previous Measurements

 

Branching Ratio (%)							log ft
Reference	P0n	P1n	P2n	Decay to 14B*(MeV)
				0, 0.74	(1.28)	(1.28), 1.38, 1.86, 2.08, 2.97, (4.31)
(1988DU09)	14 ± 3	81 ± 4	5 ± 2
(1999BE53)	< 4	> 96	< 1.6 a	< 4		≈ 100
(2002AO03)	< 0.6	94 ± 5	6 ± 5	< 0.6	91 ± 9		3.68 ± 0.05

a) P2n + P3n.

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¹⁴C(β^-)¹⁴N Evaluated Data

¹⁴O(β⁺)¹⁴N Evaluated Data

A = 14 Beta-Decays Diagram

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Last modified: 28 June 2021