1970AL21: ¹¹Be; measured T_1/2.

1971AL07: ¹¹Be; measured T_1/2, E_γ, I_γ, delayed α-spectra, αγ-coin; deduced log ft. ¹¹B deduced levels, γ-branching.

1971ALZT: ¹¹Be; measured E_γ, I_γ, E_α, I_α; deduced log ft. ¹¹B deduced levels, J, π.

1980DEZF: ¹¹Li; measured E_β, I_β, β-delayed (particle)(particle)-coin. ¹¹Be deduced new decay modes. ¹¹Be levels deduced β-branching.

1981AL03: ¹¹Be; measured β-delayed E_α, β-delayed E(⁷Li), αγ-, ⁷Liγ-coin; deduced log ft, β-branching. ¹¹B level deduced α-branching.

1982MI08: ¹¹Be; measured E_γ, I_γ, γγ-coin; deduced log ft. ¹¹B levels deduced β-, γ-branching, B(λ).

1982WA18: ¹¹Be(β^-); measured βγ-coin, Doppler shift; deduced βν-asymmetry, meson exchange effects.

Measured half-life for ¹¹Be(β^-)¹¹B

Adoptedded value:	13.81 ± 0.08 s	(1970AL21)
Measured values:	13.6 ± 0.6 s	(1971AL07)
	13.81 ± 0.08 s	(1970AL21)
	13.57 ± 0.15 s	(1958AL96, 1959WI39)
	14.1 ± 0.3 s	(1958NU40)

Previous Measurements

 

Decay to 11B* (keV)	Jπ	Branching Ratio (%)		log ft		Transition to 11B* (MeV)	Eγ (keV)		Iγ (%)
0	3/2-	A	54.7 ± 2.0	A	6.830 ± 0.016
		B	57 ± 3	B	6.81 ± 0.02
		C		C
2124.693 ± 0.027	1/2-	A	31.4 ± 1.8	A	6.648 ± 0.025	0	A	2124.473 ± 0.027	A	100
		B	29 ± 3	B	6.68 ± 0.04		B	2124.8 ± 0.7	B	33 ± 3
		C		C			C		C
4444.89 ± 0.50	5/2-	A	0.054 ± 0.004	A	10.93 ± 0.03	0	A	4443.90 ± 0.50	A	100
		B	< 0.06	B	> 10.9		B		B
		C		C			C		C
5020.31 ± 0.30	3/2-	A	0.282 ± 0.020	A	7.934 ± 0.031	0	A	5018.98 ± 0.40	A	85.6 ± 0.6
		B	0.28 ± 0.11	B	7.94 ± 0.14		B	5019.3 ± 1.7	B	0.47 ± 0.09
		C		C			C		C
						2.12	A	2895.30 ± 0.40	A	14.4 ± 0.6
		B		B			B	2893.1 ± 0.8	B	0.093 ± 0.028
		C		C			C		C
6742.7 ± 1.8	7/2-	B	<0.08
6791.80 ± 0.30	1/2+	A	6.47 ± 0.45	A	5.938 ± 0.030	0	A	6789.81 ± 0.50	A	67.5 ± 1.1
		B	6.8 ± 0.8	B	5.91 ± 0.05		B	6790.5 ± 1.8	B	4.51 ± 0.69
		C		C			C		C
						2.12	A	4665.90 ± 0.40	A	28.5 ± 1.1
		B		B			B	4666.3 ± 1.8	B	2.00 ± 0.28
		C		C			C		C
						5.02	A	1771.31 ± 0.30	A	4.0 ± 0.3
		B		B			B	1772.2 ± 0.7	B	0.28 ± 0.06
		C		C			C		C
7285.51 ± 0.43	5/2+	A	< 0.03	A	> 8.04	0	A	7282.92	A	87.0 ± 2.0
		B	< 0.16
		C		C			C		C
7977.84 ± 0.42	3/2+	A	4.00 ± 0.30	A	5.576 ± 0.033	0	A	7974.73	A	46.2 ± 1.1
		B	3.9 ± 0.5	B	5.58 ± 0.05		B	7974.7 ± 1.9	B	1.74 ± 0.30
		C		C			C		C
						2.12	A	5851.47 ± 0.42	A	53.2 ± 1.2
		B		B			B	5851.8 ± 1.8	B	2.13 ± 0.34
		C		C			C		C
						7.29	A	692.31 ± 0.10	A	0.85 ± 0.04
		B		B			B		B
		C		C			C		C
8559	≤ 5/2-	B	< 0.06	B	> 7.0
8920	5/2-	B	< 0.02	B	> 8.5
9876	3/2+	A	3.1 ± 0.4	A	4.04 ± 0.08
		B	3.0 ± 0.7	B	4.03 ± 0.15

A: (1958AL96, 1959WI39).

B: (1971AL07).

C: (1982MI08).

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¹¹C(β⁺)¹¹B Evaluated Data

A = 11 Beta-Decays Diagram

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Last modified: 21 May 2008