17B

β--Decay Evaluated Data



Measurements
1987DUZU, 1988DU09, 1988DUZT, 1989MUZU: 17B(β-n); measured β-delayed neutron spectra; deduced T1/2, multi-neutron branching ratios.
1987MIZU, 1988SA04: 17B; measured β-decay T1/2.
1989LE16: 17B; measured T1/2, delayed n emission probabilities.
1991RE02: 17B; measured T1/2, neutron emission probability, upper limits. Tof isochronous spectrometer, ion-neutron delayed coincidence.
1994RE1R: 17B(β-n); measured delayed n intensity, T1/2.
1995UEZZ, 1996UE02, 1996UEZZ: 17B(β-); measured NMR; deduced μ.
1996RA02: 17B(β-); measured β--delayed En, Eγ, Eβ, nγ-, nβ-coin, T1/2; deduced log ft. 17C deduced levels, J, π.
1997YAZX: 17B(β-), (n); measured β-ray asymmetry, En, Eγ, nβ-, nγ-coin; deduced Iβ, log ft, B(GT). 17C deduced levels, J, π.
2002OG02: 17B(β-); measured β-NMR spectra from polarized nuclei. 17B deduced quadrupole moment. 17C deduced g-factor, ground-state J, π.
2003ASZZ, 2003OG03: 17B(β-); measured β-NMR spectra from polarized source. 17B deduced quadrupole moment.
2013UE01: 17B(β-), (β-n), (β-2n); measured Eγ, Iγ, Eβ, Iβ, β-NMR, βγ-, βγγ-, βnγ-coin; deduced P(0n), P(1n), P(2n), B(GT).

Measured half-life for 17B(β-)17C

Recommended value (August, 2015): 5.07 ± 0.05 ms
Summary Table of Uncertainty Analysis:     Table 17B preview (PDF)  
Measured values: 4.93 ± 0.19 ms (1996RA02)
5.20 ± 0.45 ms (1994RE1R: see also 5.9 ± 3.0 ms in (1991RE02) and 5.2 ± 0.4 ms in
the unpublished private communications of (2008REZZ)/(1995REZZ).)
6 ± 2 ms (1989LE16)
5.08 ± 0.05 ms (1988DU09)
5.3 ± 0.6 ms (1988SA04)
Other Reviews: 5.08 ± 0.05 ms (2015BI05)

Previous Measurements

 

Atomic Mass Excess (MeV) Eβ-(max) (MeV) Branching Ratio (%)
Reference Pn P0n P1n P2n P3n P4n
(1985WA02)    44.01 ± 0.70 a (1977AJ02) 23.1 (1988DU09) 85 ± 15 21 ± 2 63 ± 1 11 ± 7 3.5 ± 0.7 0.4 ± 0.3
(1987GI05) 42.82 ± 0.80 (1982AJ01) 23.3 (1989LE16) 70 ± 30  
(1988WO09) 43.62 ± 0.17 (1986AJ04)   22.98 (1991RE02) 65 ± 35  
(1991OR01) 43.90 ± 0.23   (1996RA02) En (MeV) Ei (17C) → Ef (16C) Branching (%) b log ft  
  2.91 ± 0.05    3.82 ± 0.05 → 0    17.8 ± 1.4 4.91 ± 0.15
1.80 ± 0.02    2.64 ± 0.02 → 0    29.6 ± 2.5 4.82 ± 0.14
[1.43 ± 0.02] c [2.25 ± 0.02] → [0]   [4.7 ± 1.5] [5.66 ± 0.19]
[0.42 ± 0.01] d [1.18 ± 0.01] → [0] [10.8 ± 3.0] [5.41 ± 0.18]
  (2013UE02) En (MeV) Ei (17C) → Ef (16C) Branching (%) log ft  
En = 5.04 ± 0.02 6.08 ± 0.03 → 0 4 ± 1 5.31 ± 0.11
En = 3.81 ± 0.01 4.78 ± 0.02 → 0 0.9 ± 0.1 6.12 ± 0.06
En = 1.46 ± 0.01      4.05 ± 0.02 → 1.77 1.5 ± 0.2 5.98 ± 0.07
En = 3.01 ± 0.01 3.93 ± 0.02 → 0 20 ± 3   4.87 ± 0.07
En = 1.86 ± 0.01 2.71 ± 0.02 → 0 33 ± 4   4.78 ± 0.06
Eγ (MeV) Ei (17C) → Ef (17C) Branching (%) log ft
Eγ = 0.331 ± 0.002 0.331 ± 0.002 → 0 2.1 ± 0.2 6.22 ± 0.05
Eγ = 0.217 ± 0.002 0.217 ± 0.002 → 0 2.8 ± 1.1 6.1 ± 0.2
0 → 0 17 ± 4   5.34 ± 0.11
a) Estimated value.
b) Normalized to 63 ± 1 % (1988DU09).
c) Peak is under broad shoulder, assignment suggested by peak fitting.
d) Suggested by energy spectrum.

17C(β-)17N Evaluated Data

17N(β-)17O Evaluated Data

17F(β+)17O Evaluated Data

17Ne(β+)17F Evaluated Data

A = 17 Beta-Decays Diagram

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Last modified: 21 May 2018