11C

β+-Decay Evaluated Data



Measurements
1940MO09, 1954WO23: 11C.
1941SM11: 11C; measured T1/2.
1941SO01: 11C; measured T1/2.
1944SI30: 11C; measured T1/2.
1951DI12: 11C; measured T1/2.
1953KU08: 11C; measured T1/2.
1955BA63: 11C; measured T1/2.
1957PR53: 11C; measured T1/2.
1957SC29, 1967CA09: 11C; measured K/β+.
1958AR15: 11C; measured T1/2.
1964KA31: 11C; measured not abstracted; deduced nuclear properties.
1965PA10: 11C; measured not abstracted; deduced nuclear properties.
1969AW02: 11C; measured T1/2.
1973HO43: 11C; measured T1/2.
1973SIYS: 11C; measured T1/2.
1975AZ01: 11C; measured T1/2.
1975BE28: 11C; measured T1/2, β-shape spectrum; deduced Eβ(max), ft, shape factors.
2000LE02: 11C(β+); measured T1/2.
2002WO02: 11C(β+), (EC); measured Eγ, Iγ, βγ-coin, T1/2; deduced source standardization.
2004NI04: 11C(β+), (EC); measured βγ-coin.
Measured half-life for 11C(β+)11B

Recommended value (March, 2018): 20.3401 ± 0.0070 min
Summary Table of Uncertainty Analysis: Table 11C preview (PDF) Graph of Life-Time: Graph 11C preview (PDF)
Measured values: 20.3378 ± 0.0043 min (2018VA04)
20.334 ± 0.024 min (2002WO02)
20.382 ± 0.020 min (1975AZ01)
20.32 ± 0.12 min (1975BE28)
19.8 ± 0.8 min (1973HO43)
20.0 ± 0.3 min (1973SIYS)
20.40 ± 0.04 min (1969AW02)
20.8 ± 0.4 min (1965PA10)
20.34 ± 0.04 min (1964KA31)
20.11 ± 0.13 min (1958AR15)
20.8 ± 0.2 min (1957PR53)
20.26 ± 0.1 min   (1955BA63)
20.74 ± 0.10 min (1953KU08)
20.0 ± 0.1 min (1951DI12)
20.0 ± 0.4 min (1944SI30)
20.50 ± 0.6 min   (1941SO01)
20.35 ± 0.08 min (1941SM11)
Other Reviews: 20.361 ± 0.023 min (DDEP)
20.360 ± 0.026 min (2008SE10)
20.3402 ± 0.0068 min (2018VA04)
20.360 ± 0.022 min (Our analysis in August, 2015)

Previous Measurements

 

Log ft Eβ+(max) (keV) K/β+ ratio (%)
(1954WO23) 3.62 b (1940MO09) 1030 ± 30 (1957SC29) 0.19 ± 0.03
(1968AJ02) 3.589 ± 0.001 (1954WO23) 968 ± 8 (1967CA09) 0.230+0.014-0.011
a 3.591 ± 0.002 (1967CA09) 958.2 ± 1.4    
(1975BE28) 3.593 ± 0.006 (1975AZ01)    960 ± 1 d    
(1975AZ01)    3.599 ± 0.002 c (1975BE28) 960.8 ± 2.6    
e  3.5921 ± 0.0019        
a) B. Zimmerman, private communication to Fay Ajzenberg-Selove, (1975AJ01).
b) Using T1/2 = 20.4 min.
c) Based on Eβ+(max) = 960 + 1 keV (from Qm).
d) From Qm.
e) Using T1/2 = 20.364 ± 0.014 min; see (2012KE01).

11Li(β-)11Be Evaluated Data

11Be(β-)11B Evaluated Data

A = 11 Beta-Decays Diagram

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Last modified: 21 May 2018