Formation of long-lived radionuclides in the deuteron irradiation of zirconium

Гончар, А. В.; Kondrat'ev, S. N.; Lobach, Yu. N.; Nevskii, S. V.; Sklyarenko, V. D.; Tokarevskii, V.V.

doi:10.1007/bf00750080

Cited by 2 publications

(1 citation statement)

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“…In fact even a small-sized cyclotron (E p ≤ 16 MeV) should lead to sufficient quantities of the radioisotope via the ( p, n)-reaction. A few studies have shown that the (d, 2n)-reaction requires a deuteron energy of about 16 MeV [5][6][7], the ( 3 He, 2n)-process a 3 Heenergy of ≥ 30 MeV and the (α, 3n)-reaction an α-particle energy of ≥ 45 MeV [8]. Furthermore, the systematics of ( 3 He, 2n)-and ( p, n)-reactions suggest that the production yield of 90 Nb should be higher in the latter process.…”

Section: Introductionmentioning

confidence: 99%

Cross section data for the production of the positron emitting niobium isotope ⁹⁰Nb via the ⁹⁰Zr(p, n)-reaction

Busse¹,

Rösch²,

Qaim³

2002

Radiochimica Acta

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The radioisotope 90 Nb decays with a positron branching of 53% and a relatively low β + -energy of E mean = 0.66 MeV and E max = 1.5 MeV. Its half-life of 14.6 h makes it especially promising for quantitative investigation of biological processes with slow distribution kinetics using positron emission tomography. To optimise its production, the excitation functions of 90 Zr( p, xn)-processes were studied over the proton energy range of 7.5 to 19 MeV via the stacked-foil technique using both nat Zr and 99.22% enriched 90 ZrO 2 as targets. Thick target yields of 90 Nb were calculated from the measured excitation functions and were verified experimentally. The optimum energy range for the production of 90 Nb via the 90 Zr( p, n)-process was found to be E p = 17 → 7 MeV, with a yield of 600 MBq 90 Nb/µA h. The yield and radionuclidic purity of 90 Nb over the energy range of E p = 17.6 → 8.1 MeV were determined experimentally using nat Zr. At 4 h after EOB the yield of 90 Nb was found to be 290 MBq/µA h and its radionuclidic purity ≥ 95%.

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Section: Introductionmentioning

confidence: 99%