YIELDS OF POLONIUM AND BISMUTH NUCLIDES FROM Bi$sup 209$ AND RECOIL STUDIES OF Bi$sup 209$(p,p2n)Bi$sup 207$ REACTION AT 450 Mev
The radioactivity of Bi/sup 207/ produced in the 450-Mev proton bombardment of Bi/sup 209/ was measured. The yield ratios 07/ were determined to be 0.77 plus or minus 0.16, 0.83 plus or minus 0.19, and 0.224 plus or minus 0.013, respectively. These ratios, and Po/Bi ratios for other isobaric pairs of nuclides, are lower than values given by the Metropolis Monte Carlo intranuclear cascade calculations. Examination of available data on absolute yields of Po and Bi nuclides shows that there is an underestimation of Bi/sup 209/(p,pxn) yields in the calculation, a larger discrepancy occurring at Bi/sup 207/ than for lighter Bi nuclides (larger x values). New Monte Carlo calculations by Bertini, using a step function for the nuclear density, give slightly better agreement with experimental values if a greater radial extension is used. Recoil properties of Bi/sup 207/ from 450-Mev proton bombardment of Bi/sup 209/ were measured and compared with results derived from the Metropolis calculations. Over-all agreement is satisfactory, but the transverse momentum component seems overestimated by the calculations, a result found earlier in work with light Bi nuclides. 32 references. (auth)
- Research Organization:
- Ford Motor Co., Dearborn, Mich.; Chicago. Univ. Enrico Fermi Inst. for Nuclear Studies
- NSA Number:
- NSA-17-034885
- OSTI ID:
- 4663793
- Report Number(s):
- TID-19176
- Country of Publication:
- United States
- Language:
- English
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