An experimental study of the nuclear fusion reaction in the charge-asymmetrical dμ 3 He complex (dμ 3 He → α (3.5 MeV) + p (14.64 MeV)) is presented. The 14.64 MeV protons were detected by three pairs of Si(dE − E) telescopes placed around the cryogenic target filled with D2 + 3 He gas at 34 K. The 6.85 keV γ rays emitted during the de-excitation of the dμ 3 He complex were detected by a germanium detector. The measurements were performed at two D2 + 3 He target densities, ϕ = 0.0585 and ϕ = 0.168 (relative to liquid hydrogen density) with an atomic concentration of 3 He c3 He = 0.0496. The values of the effective rate of nuclear fusion in dμ 3 He were obtained for the first time: λf = (4.5 +2.6 −2.0 ) × 10 5 s −1 (ϕ = 0.0585); λf = (6.9 +3.6 −3.0 ) × 10 5 s −1 (ϕ = 0.168). The J = 0 nuclear fusion rate in dμ 3 He was derived: λ J =0 f = (9.7 +5.7 −2.6 ) × 10 5 s −1 (ϕ = 0.0585); λ J =0 f = (12.4 +6.5 −5.4 ) × 10 5 s −1 (ϕ = 0.168).
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