MEASUREMENT OF THE CHARGE MOMENTS OF THE EVEN-EVEN GADOLINIUM NUCLEI BY MUONIC ATOMS
Abstract
Muonic x-ray measurements on the even-A gadolinium isotopes ('154,156,158, and 160)Gd have been made. The data have been analysed in a nearly model-independent manner to extract electric monopole and quadrupole moments for the low-lying states. The equivalent nuclear charge radii (Barrett radii) have been determined for the ground states with uncertainties of about 1 mfm. Extracted isotope shifts (DELTA) have been found to agree with electronic K(,(alpha)) x-ray measurements, but not with optical measurements. Normalized optical isotope shifts do agree. The isomer shifts of the 2(,g)('+) states were measured directly from the muonic K x-rays. For ('158)Gd, disagreement with previous muonic x-ray measurements was found. Generalized quadrupole moments of the charge distribution as measured by muonic atoms have been determined and equivalent quadrupole radii for transitional quadrupole charge distributions of the 2(,g)('+) states have been determined in conjunction with recent Coulomb excitation data. Pairing-Plus-Quadrupole (PPQ) Model calculations agree with extracted quadrupole moments using equal static and transitional quadrupole charge radii.
Degree
Ph.D.
Subject Area
Nuclear physics
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