Absolute Activation Cross Sections for Reactions of Bismuth, Copper, Titanium, and Aluminum with 14.8-Mev Neutrons

Absolute neutron activation cross sections at 14.8 Mev have been measured for bismuth, copper, titanium, and aluminum based on comparison with the

{Cu}^{63} (n, 2 n) {Cu}^{62}

reaction (556 millibarns) which served as a standard for monitoring the flux. The reactions studied, measured half-lives, and cross sections are:

{Bi}^{209} (n, α) {Tl}^{206}

, 4.29±0.05 min, 1.1±0.3 mb;

{Bi}^{209} (n, p) {Pb}^{209}

, 3.31±0.03 hours, 0.83±0.40 mb;

{Bi}^{209} (n, γ) {Bi}^{210}

, ≤1.7 mb;

{Cu}^{65} (n, 2 n) {Cu}^{64}

, 12.85±0.05 hours, 954±130 mb;

{Cu}^{65} (n, p) {Ni}^{65}

, 2.56±0.20 hours, 27±11 mb;

{Ti}^{50} (n, p) {Sc}^{50}

, 1.8±0.2 min, 27±6 mb;

{Ti}^{50} (n, p) {Sc}^{50}

, 22±3 min, 48±15 mb;

{Ti}^{50} (n, γ) {Ti}^{51}

, ≤9 mb;

{Ti}^{49} (n, p) {Sc}^{49}

, 58±2 min, 29±5 mb;

{Ti}^{48} (n, p) {Sc}^{48}

, 44.0±0.9 hours, 58±8 mb;

{Ti}^{47} (n, p) {Sc}^{47}

, 3.45±0.06 days, 230±40 mb;

{Ti}^{46} (n, 2 n) {Ti}^{45}

, 3.06±0.08 hours, 50.4±8.0 mb;

{Ti}^{46} (n, p) {Sc}^{46}

, 85±2 days, ∼520 mb;

{Al}^{27} (n, α) {Na}^{24}

, 15.00±0.06 hours, 114±7 mb;

{Al}^{27} (n, p)

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