Three-Quasiparticle Intruder State in Te¹²⁵ and the Magnetic Moment of Sb¹²⁵

Author Info

N. J. Stone, University of California - Berkeley
Richard B. Frankel, University of California - BerkeleyFollow
D. A. Shirley, University of California - Berkeley

Recommended Citation

Published in Physical Review, Volume 172, Issue 4, August 20, 1968, pages 1243-1252.

NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.

The definitive version is available at https://doi.org/10.1103/PhysRev.172.1243.

Abstract

The levels of Te¹²⁵ have been studied using Sb¹²⁵ nuclei, polarized at T=0.014°K in an iron lattice, and Ge(Li) detectors. The magnetic moment of Sb¹²⁵ was determined as (2.59±0.03) μ_N. Levels (spins) were assigned at 35.9(3/2+), 145.4(11/2-), 322.2(9/2-), 443.7(probably 3/2+), 462.5(5/2+), 525.4(probably 9/2-), 636.1(7/2+), 642.3(7/2+), 671.6(5/2+) (energies in keV). The even-parity levels could be identified with levels calculated by Kisslinger and Sorensen. Using their wave functions, we calculated E2/M1 mixing ratios and branching ratios, finding quite good agreement. The odd-parity states are of special interest. The 11/2-145.4-keV state and 9/2-525.4-keV state are assigned as h_11/2 quasiparticle and h_11/2 quasiparticle plus phonon. The 9/2- state at 322.2 keV is not predictable on a single-quasiparticle-plus-phonon theory, and is assigned as a three-quasiparticle ( h_11/2)³ intruder state, bearing out Kisslinger's prediction that (j³)_j-1 intruder states should be found in low-lying spectra for high j. Evidence for other intruder states in Rh¹⁰⁰, Ag¹⁰⁹, and Ag¹¹⁰ is given.

Disciplines

Physics

Copyright

1968 American Physical Society.

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This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society. The following article appeared in Physical Review.