| Popis: |
Samarium oxide enriched in Sm/sup 144/ has been bombarded by 14-Mev neutrons to produce the isomeric state of Sm/sup 143/. The isomeric state was found to decay with a half-life of 65 plus or minus 3 sec by the emission of a 0.75 plus or minus 0.01-Mev gamma ray. Measured relative to a Cu/sup 63/ (n,2n)Cu cross section of 810 mb, a value of 1670 plus or minus 400 mb was found for the total (n,2n) cross section of Sm/sup 144/. The ratio of the cross section for production of the isomeric state to the total (n,2n) cross section was determined to be approximately 0.5. (auth) |
