g-boson panacea for magnetic properties of the nuclear groundstate band?

B. R. Barrett, E. D. Davis, A. F. Diallo

Research output: Contribution to journalArticlepeer-review


The magnetic moments of excited members of the groundstate band of even-even medium-mass nuclei are considered within the framework of the sdg-version of IBM-2. A novel asymptotic realisation of the variation-after-(angular-momentum)-projection Hartree-Bose approximation is employed. The introduction of an explicit g-boson degree of freedom is found not to resolve the discrepancy between the values of the d-boson g-factors required phenomenologically and those expected microscopically. Further study of the microscopic underpinning of the g-boson and improved experimental data are required to clarify matters: a promising testing ground would appear to be the Hf-Pt nuclei. Neither the present asymptotic realisation nor its predecessor (the "1/N-scheme") are appropriate when strong variations of magnetic moments within a groundstate band are encountered.

Original languageEnglish (US)
Pages (from-to)5-10
Number of pages6
JournalPhysics Letters B
Issue number1-2
StatePublished - Nov 26 1992

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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