Excitation Functions of $U^{235}$ and $U^{238}$ Bombarded with Helium and Deuterium Ions

Cross sections were determined for the reactions

U^{238} ({He}^{4}, n) {Pu}^{241}

[including

U^{238} ({He}^{4}, p) {Np}^{241} - β^{-} \to {Pu}^{241}

U^{238} ({He}^{4}, 2 n) {Pu}^{240}

U^{238} ({He}^{4}, 3 n) {Pu}^{239}

U^{238} ({He}^{4}, 4 n) {Pu}^{238}

U^{238}

(

{He}^{4}

, fission),

U^{235} ({He}^{4}, n) {Pu}^{238}

, and

U^{235} ({He}^{4}, 3 n) {Pu}^{236}

induced by helium ions of energies from 18.0 to 43.0 Mev. The yields of

{Pu}^{239}

{Pu}^{240}

, and

{Pu}^{241}

were determined by a mass spectrometric technique. Cross sections were measured for the reactions

U^{238} (d, p) U^{239}

U^{238} (d, 2 n) {Np}^{238}

U^{238} (d, 4 n) {Np}^{236} (22 hr)

U^{238} (d, t; d, p 2 n) U^{237}

U^{235} (d, n)

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Excitation Functions ofU235andU238Bombarded with Helium and Deuterium Ions