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6Be (1959AJ76)
(Not illustrated)
Mass of 6Be: From the Q-value of the 6Li(p, n)6Be reaction (1957BO1F), and using the Wapstra masses (1955WA1A) for 6Li, 1H and n, the mass excess (M - A) of 6Be is 20.3 ± 0.2 MeV (see also (1955AJ61)).
| 1. (a) 3He(3He, 2p)4He | Qm = 12.858 | Eb = 10.4 |
| (b) 3He(3He, p)5Li | Qm = 11.062 |
The total cross section shows a monotonic increase for E(3He) = 100 to 800 keV. At E(3He) = 200 keV, it is at least 2.5 μb. Below E(3He) = 350 keV, the cross section fits the simple Gamow exponential form. At higher energies, partial waves of l ≥ 2 appear to be required (1954GO18). See also (1953AL1A).
| 2. (a) 3He(α, n)6Be | Qm = -9.2 |
| (b) 4He(3He, n)6Be | Qm = -9.2 |
Not observed.
| 3. 6Li(p, n)6Be | Qm = -5.2 |
At Ep = 9 MeV, a neutron group is observed with Q = -5.2 ± 0.2 MeV; the reported ground-state width is < 300 keV (1957BO1F).
| 4. 6Li(3He, t)6Be | Qm = -4.5 |
Not observed.