17Ne

β+-Decay Evaluated Data



Measurements
1964MC16: 17Ne; measured not abstracted; deduced nuclear properties.
1966HA22: 17Ne; deduced log ft.
1967ES02: 17Ne; measured not abstracted; deduced nuclear properties.
1967FI10: 17Ne.
1971ESZR, 1971HA05: 17Ne; measured β-delayed proton spectra, Eγ, Iγ, T1/2, pγ-coin; deduced log ft. 17F deduced levels, antianalog state, isospin mixing.
1988BO39: 17Ne(β+p), (β+α); measured T1/2, β-delayed E(p), E(α), I(p), I(α), β(particle)-coin. 17Ne deduced particle branching ratio, β strength function.
1989RE02: 17Ne(β+p); measured β-delayed proton spectra.
1993BO36: 17Ne(β+); measured βγ-coin; deduced asymmetry.
1993RIZY: 17Ne(β+); measured βγ-coin. 17F level deduced branching ratio.
1994JO04: 17Ne(β+); compiled, reviewed β-decay data.
1996OZZZ: 17Ne(β+); measured Eβ, Eγ; deduced β-ray branching ratios. 17F deduced level.
1997KI19: 17Ne(β+p); measured β-delayed proton spectra, pγ-coin. 16O levels deduced β-delayed proton branching ratios. Implications for 12C(α, γ) reaction.
1997OZZZ, 1998OZ01: 17Ne(β+); measured Eγ, Iγ; deduced β-branching ratio to 17F first excited state, log ft, asymmetry relative to mirror nucleus 17N.
1998CH05: 17Ne(β+); measured β-delayed pα(12C)-coin. 17F deduced IAS p, α branching ratios. Implications for stellar helium burning discussed.
2002CH61: 17Ne(β+p), (β+α); measured Ep, Eα, pα(12C)-coin following decay of intermediate IAS state; deduced branching ratios. 17F deduced branching ratios for particle decay from IAS.
2002MO19: 17Ne(β+p), (β+α); measured Ep, Eα, pγ-coin, angular correlations; deduced log ft, Gamow-Teller strength. 17F deduced levels, J, π, particle decay branching ratios.
2004BA12: 17Ne(β+), (EC); measured β-NMR spectra. 17Ne deduced ground-state μ.
Measured half-life for 17Ne(β+)17F

Recommended value (July, 2015): 109.2 ± 0.6 ms (Weighted Average of 1971HA05 and 1988BO39)
Summary Table of Uncertainty Analysis:       Table 17Ne preview (PDF)  
Measured values: 109.3 ± 0.6 ms (1988BO39)
109.0 ± 1.0 ms (1971HA05)
115 ± 5 ms (1969HA2B)
105 ± 5 ms (1967ES02)
107 ± 5 ms (1967FI10)
102 ± 7 ms (1964MC16)

Previous Measurements

 

Decay to
17F* (MeV)
Jπ m Branching Ratio (%) log ft Decay
branches e
Branching Ratio (%)
(2002MO19) n (1967ES02) a (1969HA2B) a (1971HA05) (1988BO39) (2002MO19) p (1969HA2B) b (1971HA05) c (1988BO39) d (2002MO19) n (1969HA2B) (1971HA05)
0 5/2+ < 0.55 0.2 f     0.5 ± 0.2 g 0.55 ± 0.17 h > 6.9 7.3 f 6.95 ± 0.13 9.56 1u +0.16-0.12i        
0.495 1/2+ 1.59 ± 0.17 0.6 f     1.1 ± 0.5 g 0.61 ± 0.10 h 6.39 ± 0.05 6.8 f 6.55 ± 0.21 6.80 +0.08-0.06i        
3.104 1/2- 0.154 ± 0.014 < 1.0       0.49 0.48 ± 0.07 0.10+0.03-0.01 6.94 ± 0.04 6.50 ± 0.07 6.44 ± 0.06 7.12 +0.05-0.11 p0 0.154 ± 0.017 100 100
4.32 j       2.0 ± 0.5                      
4.640 3/2- 14.1 ± 0.8   19.2 ± 1.0 16.5     16.2 ± 0.7   16.54 ± 0.14     4.645 ± 0.025 4.59 ± 0.02 4.59 ± 0.02 4.57 ± 0.05 p0 14.1 ± 1.2   100 100
5.488 3/2- 49.3 ± 2.7   56.2 ± 1.8 54.9     54.0 ± 0.7   59.16 ± 0.4       3.895 ± 0.024 3.86 ± 0.01 3.86 ± 0.01 3.810 ± 0.015 p0 49.4 ± 4.3   100 100
6.037 1/2- 7.47 ± 0.41 12.4 ± 0.7 10.8     10.6 ± 0.2   7.8 ± 0.2   4.569 ± 0.024 4.44 ± 0.02 4.42 ± 0.01 4.545 ± 0.018 p0 7.48 ± 0.65 100 100
6.43 j       0.9 ± 0.3 0.36 0.35 ± 0.10     5.82 ± 0.10 5.80 ± 0.13   p0   100 100
6.70   5/2+ o     0.4 ± 0.7                      
7.03   5/2- o   ≤ 0.5                            
7.36-7.48: 4 levels     ≤ 0.7                            
7.75   (1/2+) o     0.18 0.18 ± 0.05     5.70 ± 0.20 5.67 ± 0.12   p0     > 95
p1 < 5  
8.01         4.5 ± 0.4                      
8.075 3/2- 7.44 ± 0.41 6.9   6.83 ± 0.11 7.3 ± 0.9 3.924 ± 0.024 4.00 ± 0.01 3.96 ± 0.01 3.93 ± 0.06 p0 4.79 ± 0.42   99.5
p1 0.451 ± 0.041 0.49 ± 0.02
α0 2.09 ± 0.18  
              p2 0.0804 ± 0.0091    
p3 < 0.058
p4 < 0.0491
8.200 3/2- 4.17 ± 0.20       2.08 ± 0.08 k 1.7 ± 0.3 4.129 ± 0.021     4.51 ± 0.09 p0 0.194 ± 0.018    
              p1 < 1.64 × 10-6    
p2 0.48 ± 0.12
p3 1.78 ± 0.18
p4 1.51 ± 0.13
α0 0.215 ± 0.022
8.38   5/2(-) o     0.8 ± 0.1                      
8.436 1/2- 5.54 ± 0.16 6.6   6.51 ± 0.26 4.0 ± 0.9 3.914 ± 0.013 3.85 ± 0.03 3.85 ± 0.02 4.05 ± 0.10 p0 0.619 ± 0.055   94.3
p1 1.48 ± 0.13 5.7 ± 0.5
p3 2.38 ± 0.18  
α0 0.092 ± 0.009  
              p2 0.348 ± 0.028    
p4 0.631 ± 0.050
8.825 3/2- 4.82 ± 0.15   1.9   1.90 ± 0.06   3.815 ± 0.014 4.20 ± 0.03 4.23 ± 0.02   p0 0.400 ± 0.036   92.4
p1 1.70 ± 0.15 7.6 ± 1.1
              p2 0.080 ± 0.012    
p3 1.22 ± 0.10
p4 1.25 ± 0.10
α0 0.178 ± 0.017
  9.450 l 1/2-         0.6 ± 0.2       4.43+0.19-0.13 p0, p1/p2, α0      
1.89 ± 0.05         3.938 ± 0.012       p0 0.0215 ± 0.0026    
p1 0.457 ± 0.040
p2 0.145 ± 0.014
p3 0.901 ± 0.071
p4 0.308 ± 0.028
α0 0.0570 ± 0.0058
10.030 l 3/2- 0.64 ± 0.03       0.7 ± 0.3 4.106 ± 0.21     4.06+0.26-0.16 p0 0.0211 ± 0.0026    
p4 < 0.0129
α0 0.0499 ± 0.0049
              p1 0.446 ± 0.039    
p2 0.0167 ± 0.0052
p3 0.109 ± 0.013
p5 < 0.0018
10.660 l (1/2, 3/2)- 0.81 ± 0.06       0.007 ± 0.004 3.62 ± 0.04     5.7+0.4-0.2 p0 0.0021 ± 0.0009    
α0 0.00066 ± 0.00058
              p1 0.775 ± 0.073    
p2 < 0.0066
p3 < 0.0076
p4 < 0.0056
p5 < 0.02
p6 0.033 ± 0.029
10.910   1/2- 0.785 ± 0.046       0.016 ± 0.006 3.45 ± 0.03     5.14+0.22-0.17 p0 0.0140 ± 0.0024    
α0 0.0115 ± 0.0016
              p1 0.593 ± 0.054    
p2 < 0.0346
p3 0.057 ± 0.009
p4 0.112 ± 0.011
p5 < 0.0002
p6 < 1.38 × 10-6
11.193   1/2- 0.765 ± 0.030     0.04 ± 0.01 r 0.61 0.71+0.10-0.05   0.64 ± 0.14 q 3.249 ± 0.018 3.35 ± 0.10 3.29+0.04-0.07   3.31 ± 0.11 q p0 0.0626 ± 0.0057 12 ± 4 10 ± 2
p1 0.0446 ± 0.0044 26 ± 8 not observed
p2 0.244 ± 0.019 not observed 22 ± 2
p3 0.0043 ± 0.0015   28 ± 13 24 ± 6
p4 0.182 ± 0.012   34 ± 14 44 ± 4
          α0 0.0024 ± 0.0007    
α1 0.0682 ± 0.0069
    p5 0.120 ± 0.022
p6 0.0144 ± 0.0041
α2 0.0016 ± 0.0009
α3 0.0016 ± 0.0009
12.250   3/2- ≥ 0.0021         0.001 ± 0.0006 ≤ 4.7     4.98+0.41-0.23 p0 0.0021 ± 0.0008    
a) See also (1964MC16, 1965HA20, 1965MA16).
b) Based on T1/2 = 109 ± 3 ms.
c) Calculated by using an atomic mass excess of 16.517 ± 0.026 MeV and T1/2 = 109.0 ± 1.0 ms. See Table 17.3 in (1977AJ02) for corrected ft values.
d) We are grateful to Dr. M. Martin for providing these log ft values calculated for the branchings measured in (1988BO39).
e) Proton decay to states 16O*(0.0, 6.049, 6.130, 6.917, 7.117, 8.872, 9.585) are indicated by p0, p1, p2, p3, p4, p5, p6, respectively. Alpha decay to 13N*(0.0, 2.365, 3.502, 3.547) are indicated by α0, α1, α2, α3, respectively.
f) From mirror log ft values (1967ES02).
g) Based on the mirror 17N decay.
h) Based on assumption that log ft values are the same as for the 17N mirror decays.
i) From 17N β- decay.
j) Proposed on the basis of the work of (1967ES02).
k) Obtained by (1988BO39) from addition of several of the peaks in (1971HA05).
l) New levels observed by (1988BO39) with measured energies, Ex = 9.450 ± 0.050, 10.030 ± 0.060, 10.660 ± 0.020 MeV and widths Γ =200 ± 40, 170 ± 40, 90 ± 60 keV, respectively.
m) From (2002MO19) except where noted.
n) Absolute branching ratio deduced from (2002MO19) with %βp=95.4 46 and %βα=2.77 19.
o) From Adopted Levels of 17F in ENSDF database.
p) Deduced values using NNDC LOGFT tool.
q) Decay to p3 not observed.
r) Decay to p2 not observed.

17B(β-)17C Evaluated Data

17C(β-)17N Evaluated Data

17N(β-)17O Evaluated Data

17F(β+)17O Evaluated Data

A = 17 Beta-Decays Diagram

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Last modified: 17 October 2018