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Spallation yields of xenon from irradiation of Cs, Ce, Nd, Dy, and a rare Earth mixture with 730-Mev protons

1970; American Geophysical Union; Volume: 75; Issue: 22 Linguagem: Inglês

10.1029/ja075i022p04205

2156-2202

C. M. Hohenberg, M. W. Rowe,

Radiation Therapy and Dosimetry

We have made a mass spectrometric determination of the stable xenon isotopes that result from spallation of cesium, cerium, neodynium, dysprosium, and a mixture of rare earth elements by bombardment by 730-Mev protons. The results obtained suggest that the report that Angra dos Reis fission xenon differs from that in Pasamonte may not be valid, but rather that unusual spallation xenon yields are expected in Angra dos Reis, which complicates estimation of the fission xenon spectrum. Spallation correlation plots should be used with caution because a principal change in the spallation yield with varying targets occurs at Xe130, the isotope commonly used for normalization in such correlation plots. Other isotopes commonly considered remain about the same.