17Ne

β+-Decay Evaluated Data

Measurements
1966HA22: 17Ne; deduced log ft.
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.
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

Adopted value:  109.2 ± 0.6 ms; the weighted mean of (1971HA05 and 1988BO39)
Measured values: 109.3 ± 0.6 ms (1988BO39)
109.0 ± 1.0 ms (1971HA05)
115 ± 5 ms (HA69N)
105 ± 5 ms (1967ES02)
107 ± 5 ms (1967FI10)
102 ± 7 ms (1964MC16)
Previous Measurements

 
Decay to
17F* (MeV)		 Jπ Branching Ratio (%) log ft Decay
branches e		 Branching Ratio (%)
(1967ES02) a (HA69N) a (1971HA05) (1988BO39) (HA69N) b (1971HA05) c (1988BO39) d (HA69N) (1971HA05)
0 5/2+ 0.2 f     0.5 ± 0.2 g 0.55 ± 0.17 h 7.3 f 6.95 ± 0.13 9.56 1u +0.16-0.12i      
  0.495 1/2+ 0.6 f     1.1 ± 0.5 g 0.61 ± 0.10 h 6.8 f 6.55 ± 0.21 6.80 +0.08-0.06i      
3.10 1/2- < 1.0       0.49 0.48 ± 0.07 0.10+0.03-0.01 6.50 ± 0.07 6.44 ± 0.06 7.12 +0.05-0.11 p0 100 100
  4.32 j     2.0 ± 0.5                  
4.65 3/2- 19.2 ± 1.0 16.5     16.2 ± 0.7   16.54 ± 0.14     4.59 ± 0.02 4.59 ± 0.02 4.57 ± 0.05 p0 100 100
5.49 3/2- 56.2 ± 1.8 54.9     54.0 ± 0.7   59.16 ± 0.4       3.86 ± 0.01 3.86 ± 0.01 3.810 ± 0.015 p0 100 100
6.04 1/2- 12.4 ± 0.7 10.8     10.6 ± 0.2   7.8 ± 0.2   4.44 ± 0.02 4.42 ± 0.01 4.545 ± 0.018 p0 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+   0.4 ± 0.7                  
7.03 5/2- ≤ 0.5                        
7.36 → 7.48   ≤ 0.7                        
7.75 (1/2+)   0.18 0.18 ± 0.05   5.70 ± 0.20 5.67 ± 0.12   p0   > 95
p1 < 5  
8.01     4.5 ± 0.4                  
8.08 3/2- 6.9   6.83 ± 0.11 7.3 ± 0.9 4.00 ± 0.01 3.96 ± 0.01 3.93 ± 0.06 p0   99.5
p1 0.49 ± 0.02
α0  
8.2   3/2-       2.08 ± 0.08 k 1.7 ± 0.3     4.51 ± 0.09 p0    
8.38   5/2(-)   0.8 ± 0.1                  
8.43 1/2- 6.6   6.51 ± 0.26 4.0 ± 0.9 3.85 ± 0.03 3.85 ± 0.02 4.05 ± 0.10 p0   94.3
p1 5.7 ± 0.5
p3  
α0  
  8.825 (1/2, 3/2)-   1.9   1.90 ± 0.06   4.20 ± 0.03 4.23 ± 0.02   p0   92.4
p1 7.6 ± 1.1
9.4 l         0.6 ± 0.2     4.43+0.19-0.13 p0, p1/p2, α0    
10.0 l           0.7 ± 0.3     4.06+0.26-0.16 p0, p4, α0    
10.66 l         0.007 ± 0.004     5.7+0.4-0.2 p0, α0    
10.9     1/2-       0.016 ± 0.006     5.14+0.22-0.17 p0, α0    
11.193 1/2-   0.04 ± 0.01 0.61 0.71+0.10-0.05 0.64 ± 0.14 3.35 ± 0.10 3.29+0.04-0.07 3.31 ± 0.11 p0 12 ± 4 10 ± 2
              p1 26 ± 8 22 ± 2
p2    
p3   28 ± 13 24 ± 6
p4   34 ± 14 44 ± 4
α0    
α1    
12.23             0.001 ± 0.0006     4.98+0.41-0.23 p0, α0    
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, 6.05, 6.13, 6.92, 7.16) are indicated by p0, p1, p2, p3, p4, respectively. Alpha decay to 13N*(0.0, 2.36) are indicated by α0, α1 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.
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: 08 July 2009