HYPERFINE-STRUCTURE STUDIES OF Er$sup 169$ AND ISOTOPES OF REFRACTORY ELEMENTS (thesis)

Technical Report · Wed Jan 23 04:00:00 EST 1963

OSTI ID:4715577

Doyle, W M

The atomic-beam magnetic-resonance method was used to investigate the electronic and nuclear properties of Er/sup 169/ and to determine the spins of several refractory-group nuclides. The apparatus used in the erbium research was sufficiently accurate to allow measurement of the nuclear dipole moment directly through its interaction with the external magnetic field. Investigations carried out in the /sup 3/H/sub 6/ electronic ground state yielded the results A = 725.46(31) Mc, g/sub I/ = 5.55(27) x 10/sup -4/, and g/sub j/ = -1.16381(5), where A is the dipole interaction constant, g/sub I/ and g/sub j/ are the nuclear and electronic g factors, respectively, expressed in terms of the Bohr magneton, and the nuclear spin I = 1/2 had previously been determined. The value of the nuclear moment /sub I/ = +0.513(25) nm derived from g/sub I/ and corrected for diamagnetic shielding is consistent with the value inferred from the interaction constant if the ( 1/r/sup 3/) value of Lindgren is used and the possible effects of configuration mixing are neglected. Beams of refractory metals were produced by electron bombardment of narrow wire sources, and the spins of several nuclides were measured. These are listed along with the half lives and the electronic states in which resonances were observed. The experiments are discussed and the results interpreted in the light of current atomic and nuclear theory. 40 references. (auth)

• Research Organization: California. Univ., Berkeley. Lawrence Radiation Lab.
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-17-020997
• OSTI ID: 4715577
• Report Number(s): UCRL-10609
• Country of Publication: United States
• Language: English

Related Subjects

ATOMS
BEAMS
DETECTION
DIPOLES
ELECTRON BEAMS
ELECTRONS
ENERGY LEVELS
ERBIUM 169
GYROMAGNETIC RATIO
HALF-LIFE
HYDROGEN
HYPERFINE STRUCTURE
INTERACTIONS
ISOTOPES
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIC RESONANCE
MAGNETISM
MEASURED VALUES
METALS
NUCLEAR MODELS
NUCLEAR STRUCTURE
PHYSICS
RADIATION SOURCES
REFRACTORIES
RESONANCE
SPIN