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7He (1984AJ01)

(See the Isobar Diagram for 7He)

GENERAL: See also (1979AJ01) and Table 7.1 [Table of Energy Levels] (in PDF or PS).

Reactions involving pions: (1978FU09, 1979BA1M, 1979PE1C).

Hypernuclei: (1978DA1A, 1978SO1A, 1979BU1C, 1981WA1J, 1982KO11).

Other topics: (1979BE1H, 1981AV02, 1982AW02, 1982NG01).

1. 7Li(π-, γ)7He Qm = 128.36

See (1979AJ01).

2. 7Li(n, p)7He Qm = -10.42

At En = 14.8 MeV a proton group is reported corresponding to 7Heg.s.: Γ < 0.2 MeV: see (1979AJ01). See also (1981BR1K).

3. 7Li(t, 3He)7He Qm = -11.18

The 3He particles to the ground state of 7He have been observed at Et = 22 MeV. The width of the ground state is 160 ± 30 keV; for a radius of 2.2 fm and ln = 1, this width is 0.22 of the Wigner limit. The angular distribution is peaked in the forward direction. No other states of 7He were observed for Ex < 2.4 MeV: see (1979AJ01).
4. 9Be(6Li, 8B)7He Qm = -23.60

At E6Li) = 80.0 and 93.3 MeV the ground state of 7He is strongly populated, indicating negative parity, as expected. There is no indication of relatively sharp states of 7He with Ex ≤ 10 MeV (1977WE03).