15B

β--Decay Evaluated Data



Measurements
1984DU15: 15B(β-n); measured T1/2, zero-, two-neutron emission probability limits.
1986CU01, 1986HAYX, 1987MIZU: 15B(β-); measured β-decay T1/2.
1988MU08: 15B(β-n); measured T1/2, neutron emission probabilities.
1988SA04: 15B; measured β-decay T1/2.
1989BA38: 15B(β-n); measured βn-coin.
1989LE16: 15B(β-n); measured T1/2, delayed n emission probabilities.
1989MUZU: 15B(β-n); measured T1/2, β-delayed neutron emission probabilities.
1991HA25: 15B(β-n); measured β-decay curve, delayed-neutron spectra, Iβ; deduced log ft. 15C deduced levels, β-decay branching ratios.
1991RE02: 15B(β-n); measured T1/2, neutron emission probabilities.
1992AS01, 1992OKZT, 1992OKZV: 15B(β-); measured g-factor.
1993ASZZ, 1994ASZZ, 1994UE04: 15B(β-); measured β NMR, polarized sources; deduced μ.
1994RE1R: 15B(β-n); measured delayed n intensity, T1/2.
1995OK04, 1996IZ01, 1996IZ02, 1996IZZY, 1996OKZZ: 15B(β-); measured β NMR; deduced μ.
1996MIZS: 15B(β-); measured β-ray asymmetry, βn-coin, E(n). 15C deduced levels, J, π, log ft. β-NMR method, tof.
2000BU33, 2001GR06: 15B(β-n); measured β-delayed neutron spectra.
2001MIZW, 2003MI01: 15B(β-n); measured β asymmetry Iβ(θ), β-delayed neutron spectra from spin-polarized source. 15C levels deduced J, π. β-NMR technique.
2003ASZZ: 15B(β-); measured β-NMR spectra; deduced quadrupole moments.
2003YO02: 15B(β-), (β-n); measured β-decay T1/2, β-delayed neutron multiplicities.

Measured half-life for 15B(β-)15C

Recommended value (September, 2015): 10.00 ± 0.11 ms (Limitation of Statistical Weights)
Summary Table of Uncertainty Analysis:        Table 15B preview (PDF)  
Measured values:     9.86+0.15-0.19 ms (2003YO02)
  9.83 ± 0.08 ms (1994RE1R: see also 10.1 ± 0.2 ms in (1991RE02) and 9.87 ± 0.07 ms in the
unpublished private communications of (2008REZZ)/(1995REZZ).)
10.4 ± 0.2 ms (1991HA25)
10.5 ± 0.4 ms (1991HA25)
10.3 ± 0.4 ms (1989BA38)
10.3+0.6-0.5 ms (1989LE16)
10.4 ± 0.3 ms (1988MU08)
10.8 ± 0.5 ms (1988SA04)
  8.8 ± 0.6 ms (1986CU01)
11 ± 1 ms (1984DU15)
Other Reviews: 10.18 ± 0.35 ms (2015BI05)

Previous Measurements

 

Branching Ratio (%)
Reference P0n P1n P2n Decay to 15C*(MeV)
0, 0.74 3.10 4.22 4.66 5.83 6.42 A
(1984DU15) < 5   < 1.5            
(1991HA25)   99.68+0.08-1.58 < 1.5 0.32 ± 0.08 62.9 ± 2.4 7.9 ± 1.6 22.9 ± 1.2 4.1 ± 0.9 1.9 ± 0.5
log ft   4.34 ± 0.02 5.09 ± 0.09   4.57 ± 0.02 5.13 ± 0.10 5.39 ± 0.13
(2003YO02)   99.68              
A) In (1991HA25), the value En = 4820 ± 60 keV was measured and the group was assigned to either Ex = 6358 or Ex = 6417 keV. In (2003MI01), the En = 4861 ± 8 keV was measured which corresponds to Ex = 6426 ± 8 keV.

15C(β-)15N Evaluated Data

15O(β+)15N Evaluated Data

A = 15 Beta-Decays Diagram

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Last modified: 21 May 2018