1949HU19: ¹⁰Be.

1951LI26: ¹⁰Be.

1972EM01: ¹⁰Be; measured T_1/2.

1972MC26: ¹⁰Be; measured T_1/2.

1972YI01: ¹⁰Be; measured T_1/2.

1993MI26: ¹⁰Be(β^-); analyzed ¹⁰Be isotope ratio data; deduced T_1/2.

2007GR05: ¹⁰Be(β^-); measured E_β; deduced shape-factor functions, cutoff energy yields, maximum-point energies.

2010CH18: ¹⁰Be(β^-); measured electron spectrum; deduced ¹⁰Be activity, T_1/2.

2010KO19: ¹⁰Be(β^-); measured electron spectrum; deduced ¹⁰Be activity, T_1/2.

Measured half-life for ¹⁰Be(β^-)¹⁰B

Recommended value (September, 2019):	(1.385 ± 0.016) × 106 y	See notes.
Summary Table of Uncertainty Analysis:	(PDF)	Graph of Life-Time: (PDF)
Measured values:	(1.386 ± 0.016) × 106 y	(2010CH18)
	(1.388 ± 0.018) × 106 y	(2010KO19)
	(1.36 ± 0.07) × 106 y	(2007NI16): Characterization of the ICN sediment 10Be/9Be composition. Reanalysis of the (1993MI26) ICN sediment and determination of the lifetime.
	(1.53 ± 5%) × 106 y	(1993MI26): Analysis of NIST-4325: Excluded due to potential systematic error in characterizing the 10Be content (see notes).
	(1.48 ± 5%) × 106 y	(1993MI26): Analysis of ICN sediment: Excluded due to potential systematic error in characterizing the 10Be content (see notes).
	(1.34 ± 0.07) × 106 y	(1986HOZB)
	(1.51 ± 0.06) × 106 y	(1987HO27): Excluded because systematic errors surround the characterization of the ORNL-A and ORNL-Master 10Be solutions (see notes). See also (1988FAZX), Ins. Phys. Conf. Ser. No 94, section 11, 1988, 379.
	(1.48 ± 0.15) × 106 y	(1975MA54): Discussion in (1987HO27)
	(1.6 ± 0.2) × 106 y	(1972EM01): Update of (1947HU03) using more up-to-date cross section data. Excluded since sizeable systematic uncertainties are open.
	(1.7 ± 0.4) × 106 y	(1972MC26): Correction to (1972MC26) by converting from mean lifetime to half-life. Excluded since sizeable systematic uncertainties are open.
	(1.5 ± 0.3) × 106 y	(1972YI01)
	(2.5 ± 0.5) × 106 y	(1947MC01): Superseded with (ln 2) correction factor in (1972MC26).
	(2.9 ± 0.5) × 106 y	(1947HU03): Superseded with updated cross section data in (1972EM01). See also (1949HU19).
Other Reviews:	(1.387 ± 0.012) × 106 y	Average result obtained in (2010CH18 and 2010KO19). Used in most applied 10Be decay dating communities and AMS calibration applications.
	(1.51 ± 0.06) × 106 y	(Our analysis in August, 2015)

Previous Measurements

 

Log ft		Eβ(max) (keV)
(1951FE1A)	13.65	(1949HU19)	570 ± 10
a	13.42	(1951LI26)	556 ± 3
b	13.397 ± 0.017	c	560 ± 10
d	13.396 ± 0.012

a) B. Zimmerman and G. Fox, private communication to Fay Ajzenberg-Selov (1974AJ01).

b) M.J. Martin, private communication to Fay Ajzenberg-Selov (1988AJ01).

c) See (1947MC01).

d) See (2004TI06).

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A = 10 Beta-Decays Diagram

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Last modified: 28 June 2021