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The Measurement of Magnetic Moments of Excited States in Palladium, Tungsten, and Thulium Nuclei


Kaufmann, Elton Neil (1969) The Measurement of Magnetic Moments of Excited States in Palladium, Tungsten, and Thulium Nuclei. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/85AT-X002.


The perturbed gamma - gamma angular correlation technique has been used to measure the magnetic moments of several nuclear excited states. The magnetic moment of the second excited 2+ state in 106Pd has been measured to be μ = 0.74 ± 0.14 nm, in good agreement with the interpretation of that state as a two-phonon quadrupole vibration about spherical equilibrium. The magnetic moment of the two-quasiparticle 2- state at 1289 keV in 182W has been measured to be μ = 1.04 ± 0.24 nm) in poor agreement with the predictions of the "strong-coupling" approximation. The probable origin of the discrepancy is discussed. The following magnetic moments in odd-mass thulium nuclei have been measured: the 5/2+ level at 118.2 keV in 169Tm with μ 0.79 ± 0.08 nm; the 7/2+ level at 138.9 keV in 169Tm with μ = 1.33 ± 0.07 nm; the 5/2+ level at 116.7 keV in 171Tm with μ 0.81 ± 0.37 nm; and the 7/2+ level at 129.1 keV in 171Tm with μ = 1.44 ± 0.14 nm. In addition, the multipole mixing amplitude for the 109.8 keV transition in 169Tm has been measured to be δ(E2/M1) = -0.15 ± 0.02) and the crossover-to-cascade transition intensity ratios for the 5/2+(116.7 keV) and 7/2+(129.1 keV) states in 171Tm have been measured to be Iγ (5/2 → 1/2)/Iγ(5/2 → 3/2) = 0.115 ± 0.005 and Itot(7/2 → 3/2)/Itot(7/2 → 5/2) = 3.22 ± 0.58, respectively. The results of the measurement in the thulium nuclei have been us ed in conjunction with other data to determine the parameters in the rotational model description of the nuclei. The magnetic parameters are interpreted in terms of transverse and longitudinal spin polarization effects; where only qualitative agreement with theory is found. A correction to the rotational model predictions of electric quadrupole transition rates is also discussed.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Kankeleit, Egbert (advisor)
  • Boehm, Felix H. (co-advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:30 August 1968
Funding AgencyGrant Number
Atomic Energy CommissionUNSPECIFIED
Record Number:CaltechTHESIS:06082017-112608016
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10317
Deposited By: Benjamin Perez
Deposited On:23 Jun 2017 16:02
Last Modified:21 Dec 2019 04:24

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