13B

β--Decay Evaluated Data

Measurements
1962MA19: 13B; deduced nuclear properties.
1968CH28: 13B; measured T1/2, delayed n(t); deduced log ft, delayed n/β-branching ratio.
1969JO21: 13B; measured βγ-coin, Eβ, β delayed n-delay; deduced log ft, β-branching. 13C deduced levels, J, π, neutron-emitting states.
1971WI07: 13B; measured T1/2; deduced ft ratios.
1974AL12: 13B; measured βn-coin; deduced log ft. 13C deduced level, J, π.
1988SA04: 13B; measured β-decay T1/2.
1994RE1R, 1991RE02: 13B(β-n); measured delayed n intensity, T1/2.
1997SO34: 13B(β-n); measured decay products, En, In; deduced neutron emission probabilities.
2002GEZT: 13B(β-); measured Eγ, T1/2.
2003FO11: 13B; analyzed β-delayed neutron decay data; deduced ground-state configuration features.
2004NA38: 13B(β-); measured Iβ(θ, H, t), β-NMR and β-NQR spectra from polarized source. 13B deduced quadrupole moment, μ.
2005GEZY: 13B(β-); measured T1/2.
2006GE21: 13B(β-); measured Eβ, Eγ, T1/2.
2010MA44: 13B(β-); measured Eβ, Iβ(θ) from aligned 13B; deduced alignment correlation coefficient, G-parity tensor coupling constant.
Measured half-life for 13B(β-)13C

Recommended value (July, 2015): 17.30 ± 0.17 ms
Summary Table of Uncertainty Analysis:     Table 13B preview (PDF)  
Measured values: 16.59 ± 0.02 ms (2006GE21) (Excluded)
≈ 17.36 ms (2002GEZT, 2005GEZY) (Excluded)
17.0 ± 0.4 ms (1997SO34) (Excluded: insufficient experimental details)
16.7 ± 0.6 ms (1994RE1R: see also 11 ± 9 ms in (1991RE02) and 16.7 ± 0.3 ms in the
unpublished private communications of (2008REZZ)/(1995REZZ).)
17.6 ± 1.2 ms (1988SA04)
17.33 ± 0.17 ms (1971WI07)
16 ± 1 ms (1968CH28) (Excluded)
17.39 ± 0.41 ms (1962MA19) [This value depends on T1/2(12B): T1/2(13B) ⁄ T1/2(12B) = 0.86 ± 0.02]
Other Reviews: 17.16 ± 0.18 ms (2015BI05)
Previous Measurements

 
Decay to 13C*
(MeV)		 Branching Ratio (%) log ft Transition to
13C* (MeV)		 Eγ a (keV) Iγ b
(1962MA19) (1969JO21) (1974AL12) (1962MA19) (1969JO21) c (1970ES03) (1974AL12) d
0 e  93 ± 1.5 92.1 ± 0.8     4.01 4.02 ± 0.02 4.01 ± 0.01 4.04 ± 0.01   4.034 ± 0.006      
3.09 ≤ 0.7     ≥ 5.7         ≥ 5.6      
3.68    7 ± 1.5 7.6 ± 0.8   4.53 4.47 ± 0.05 4.45 ± 0.04 4.45 ± 0.05   4.45 ± 0.05 3.09   595.013 ± 0.011 0.057 ± 0.007
0 3683.921 ± 0.023 7.6 ± 0.8
3.85 ≤ 0.7     ≥ 5.5         ≥ 5.5 3.68   169.300 ± 0.004 ≤ 0.009
3.09   764.316 ± 0.010 ≤ 0.3    
0 3853.170 ± 0.022 ≤ 0.5    
7.47 ≤ 1.5     ≥ 4.2                
   7.55 f      0.094 ± 0.020 g     5.37 ± 0.09 5.33 ± 0.08 5.33 ± 0.09   5.33 ± 0.10 0 7545 ± 3 0.094 ± 0.020
8.86      0.16 ± 0.03 g     4.63 ± 0.08 4.60 ± 0.08 4.59 ± 0.08   4.59 ± 0.09 0   8857 ± 20 0.16 ± 0.03
9.50     < 0.01         > 5.2        
9.90     0.022 ± 0.007         4.95 ± 0.12 4.95 ± 0.14 0 9893 ± 5 0.022 ± 0.007
a) From recoil-corrected E(level) differences.
b) Deduced from the β feedings and γ branching ratios given in (1991AJ01) (M.J. Martin).
c) Based on τ1/2 = 17.33 ± 0.17 msec.
d) M.J. Martin, private communication to Fay Ajzenberg-Selov (1991AJ01).
e) Eβ-(max) = 13.4 ± 0.2 MeV (1962MA19).
f) Ex = 7.577 ± 0.030 MeV (1974AL12).
g) See also (1962MA19, 1965PO03, 1968CH28).
13N(β+)13C Evaluated Data

13O(β+)13N Evaluated Data

A = 13 Beta-Decays Diagram

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Last modified: 29 June 2021