Phys.Rev. C40, 2390 (1989)

T.P.Gorringe, S.Ahmad, D.S.Armstrong, R.A.Burnham, M.D.Hasinoff, A.J.Larabee, C.E.Waltham, G.Azuelos, J.A.Macdonald, J.-M.Poutissou, M.Blecher, D.H.Wright, P.Depommier, R.Poutissou, E.T.H.Clifford

Search for the Tetraneutron using the Reaction ⁴He(π^-, π⁺)⁴n

NUCLEAR REACTIONS ⁴He(π^-, π⁺), E=80 MeV; measured pion momentum spectra; deduced tetraneutron production σ upper limit.

doi: 10.1103/PhysRevC.40.2390