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GENERAL: See also (80AJ01) and Table 11.3 [Table of Energy Levels] (in PDF or PS).

Model calculations:(RA81E, SE81C, MI83G, VA84).

Electromagnetic transitions:(MI80H).

Complex reactions involving ¹¹Be:(BO79GG, WI80N, EN83A, WI83H, GR84A, HI84).

Hypernuclei:(BU79L, IK82, KA82T, KO82N, FE83A, KO83O, MI83G).

Other topics:(SE81C, NG82).

Ground-state properties of ¹¹Be:(AV81B, NG82, AN83D).

1. 11Be(β-)11B

Qm = 11.508

The decay is complex: see reaction 28 in ¹¹B and Table 11.13 (in PDF or PS). The half-life is 13.81 ± 0.08 sec (AL70I). See also (80AJ01).

2. 9Be(t, p)11Be

Qm = -1.167

Proton groups have been observed to the states displayed in Table 11.3 (in PDF or PS). τ_m for the first excited state is 166 ± 15 fsec (MI83B), corresponding to a very large E1 transition strength of 0.36 ± 0.03 W.u.; E_γ = 320.04 ± 0.10 keV (see (MI83B)). The J^π of ¹¹Be*(0.32) is 1/2^-, as determined by a study of the yield of 320 keV γ-rays as a function of time in μ^- capture by ¹¹B. The strength of the E1 transition fixes J^π of ¹¹Be_g.s. to be 1/2⁺ or 3/2⁺, using the parity information obtained from the nature of the β^- decay of the ground state [see reaction 28 in ¹¹B]. ¹¹Be*(5.24, 6.71, 8.82) are strongly populated at E_t = 20 MeV indicating that these states have a large overlap with ⁹Be_g.s. + two neutrons. See (80AJ01) for references.

3. 10Be(n, γ)11Be

Qm = 0.503

See (75AJ02).

4. 10Be(d, p)11Be

Qm = -1.722

Angular distributions of the p₀ and p₁ groups have been measured at E_d = 6 MeV and 12 MeV: l_n = 0 [and therefore J^π = 1/2⁺ for ¹¹Be(0)] and 1, S = 0.73 ± 0.06 and 0.63 ± 0.15, respectively. At E_d = 25 MeV ¹¹Be*(0, 0.32, 1.78) are strongly populated: S = 0.77, 0.96 and 0.50, respectively, J^π = (5/2, 3/2)⁺ for ¹¹Be*(1.78) (l_n = 2)]. See (80AJ01) for references.

5. 11Li(β-)11Be †

Qm = 20.76

See ¹¹Li.

6. 12C(7Li, 8B)11Be

Qm = -28.189

At E(⁷Li) = 82 - 83 MeV groups corresponding to ¹¹Be*(0, 1.8, 3.4) are reported by (AL82H, AL83I).

7. 13C(6Li, 8B)11Be

Qm = -25.885

At E(⁶Li) = 80 MeV, ¹¹Be*(0.32) is strongly populated and the angular distribution to this state has been measured. ¹¹Be*(2.69, 4.0) are also observed: see (80AJ01).