Two new isotopes of einsteinium $sup 243$Es and $sup 244$Es
Journal Article
·
· Phys. Fenn., v. 8, no. 4, pp. 357-363
OSTI ID:4345328
Two isotopes of einsteinium, /sup 243/Es and /sup 244/Es, were studied by means of alpha -particle spectroscopy. The isotopes were produced by bombarding a /sup 233/U target with /sup 15/N ions accelerated by the Berkeley HILAC. The half-lives and the alpha -particle energies of the two nuclides were observed to be: /sup 243/Es 21 plus or minus 2 s, 7.89 plus or minus 0.02 MeV, /sup 244/Es 37 plus or minus 4 s, and 7.57 plus or minus 0.02 MeV. The mass assignments are based on excitation function measurements and in the case of /sup 244/Es on the genetic link to its EC daughter /sup 244/Cf. Estimates for the EC branching of /sup 243/Es and /sup 244/Es are given. (auth)
- Research Organization:
- Univ. of California, Berkeley
- NSA Number:
- NSA-29-025627
- OSTI ID:
- 4345328
- Journal Information:
- Phys. Fenn., v. 8, no. 4, pp. 357-363, Other Information: Orig. Receipt Date: 30-JUN-74; Bib. Info. Source: FINL (Finland (sent to DOE from))
- Country of Publication:
- Finland
- Language:
- English
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· Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.)
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OSTI ID:4345328