Experimental evidence for nuclear excitation by electron transition in $sup 189$Os
Nuclear excitation by electron transition (NEET) was investigated by electron bombardment of /sup 189/Os. According to theory, if the 70.882-keV electron transition occurs (fllling a hole in the K orbit), the nuclear state at 69.59 keV may be excited; this state then decays to the 5.7-h isomeric state. The decay curve of radioactivity produced showed the above half-life. Expressions for the relative cross section and the cross section of isomer production were obtained and compared with experimental results. It was concluded that the NEET phenomenon was confirmed in /sup 189/Os because the /sup 189m/Os activity was found by electron bombardment, the contribution of Coulomb excitation is negligible theoretically, and the relative excitation function is explained by the theory. The NEET cross section is of the order of mb in /sup 189/Os. (3 figures) (RWR)
- Research Organization:
- Osaka Univ., Toyonaka, Japan
- NSA Number:
- NSA-29-030814
- OSTI ID:
- 4308701
- Journal Information:
- Progr. Theor. Phys. (Kyoto), v. 50, no. 5, pp. 1771-1773, Other Information: Orig. Receipt Date: 30-JUN-74; Bib. Info. Source: JA (JA)
- Country of Publication:
- Japan
- Language:
- English
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Nuclear excitation by electronic transition (NEET) in {sup 189}Os.