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Title: Measurements of multipolarities in 225Ra
Authors: Andersen, E., García Borge, María José, Burke, D. G., Gietz, H., Hill, P., Kaffrell, N., Kurcewicz, W., Løvhøiden, G., Mattsson, S., Naumann, R. A., Nybø, K., Nyman, G., Thorsteinsen, T. F.
Keywords: Radioactivity 225Fr (β-) [from Th, U (p, spallation)]
Measured Ee, I(ce), γγ-, eγ-coincidences
225Ra deduced levels, ICC, multipolarities, I(π)
UC2 and ThC2 targets
On-line mass separation
Ge, Si(Li) detectors
Mini-orange spectrometer
Issue Date: 9-Jan-1989
Publisher: Elsevier
Abstract: Multipolarities of 45 transitions in 225Ra have been established by investigating the radiations associated with the β− decay of 225Fr. The study includes β−, e− and γ-singles spectra, e−γ- and γγ-coincidence measurements. The conversion electrons were measured with a mini-orange electron spectrometer, and the γ-spectra with Ge detectors. The multipolarities obtained from the measured conversion coefficients support the assignments of spin-parity doublets thus giving evidence for a stable octupole deformation of this nucleus. The negative parity of the 394.2 keV level established in the present work indicates that this level is a candidate for the parity-doublet partner of the (5/2)+ state at 236.3 keV.
Description: 11 pages, 3 tables, 2 figures.
Publisher version (URL):
ISSN: 0375-9474
???metadata.dc.identifier.doi???: 10.1016/0375-9474(89)90704-5
Citation: Nuclear Physics A 491(2): 290-300 (1989)
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