Excitation functions of proton induced nuclear reactions on natural tellurium and enriched 123Te: Production of 123I via the 123Te(p, n)123I-process at a low-energy cyclotron

✍ Scribed by B. Scholten; S.M. Qaim; G. Stöcklin

• Publisher: Elsevier Science
• Year: 1989
• Weight: 595 KB
• Volume: 40
• Category: Article
• ISSN: 0883-2889
• DOI: 10.1016/0883-2889(89)90187-1

✦ Synopsis

Excitation functions were measured by the stacked-foil technique for (p, xn) reactions up to EP = 20 MeV on natural tellurium and enriched '23Te. Thick target vields were calculated for the formation of '*'I, "'I, iz41, '261, "'1 and "'1 from natural tellurium, andYZ21-and iz31 from enriched iz3Te. The optimum energy range for the production of '23I via the lz3Te( p, n)lZ31 reaction is fP = 14.5 + 11 .O MeV, and the theoretical thick target yield 4mCi/pAh.

The levels of the three major impurities '241, 12'1 and "q are directly dependent on the '24Te, '26Te and ""Te contents, respectively, in enriched lz3Te. The levels of impurities determined experimentally under high-current production conditions agree with those calculated from the cross section data. A comparison of the three direct methods of '231-production, viz. '?e(p, 2n)1231, lz3Te(p, n)12 'I and '22Te(d, n)12'I, under optimum conditions for each reaction, is given. The yield and impurity-level data suggest that the '23Te(p, n)iZ31 reaction has a great potential for production in a low-energy cyclotron, if highly enriched "'Te (> 91%) is used.