EFFECT OF PARAMAGNETISM ON DIRECTIONAL CORRELATION (MEASUREMENT OF MAGNETIC NUCLEAR MOMENTS OF Dy$sup 160$ AND Er$sup 166$)

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Helvetica Physica Acta (Switzerland)

OSTI ID:4074597

Kundig, W

Angular correlation investigations were undertaken in order to elucidate the influence of extranuclear fields. It is shown that for the gamma - gamma cascades of Dy/sup 1//sup 6//sup 0/ and Er/sup 1//sup 6//sup 6/, most of the observed attenuation effects can be explained by magnetic interaction of the electron shell with the magnetic dipole moment of the nucleus. A method for determining nuclear moments in paramagnetic materials is described. Experimental results indicate that the magnetic field H/sub 0/ which influences the nuclear spin precession is the external field H/sub e//sub x//sub t/. modified by a paramagnetic correction factor: H/sub 0/ = H/sub e//sub x//sub t/. (1 + C'/(T - THETA )). The g-factors of the first rotational state of two even-even nuclei were measured; for Dy/sup 1//sup 6//sup 0/, /sub g//sub N/ = 0.46 + 0.05 and for Er/sup 1//sup 6//sup 6/, /sub g/ /sub N/ = 0.36 plus or minus 0.06. The gamma - gamma angular correlation behavior on reversal of the magnetization of ferromagnetic Tb was investigated. Thence the mean life of the first vibrational state of its decay product, Dy/sup 160/ was determined as Tau/sub N/ = (1.1 plus or minus 0.4) x 10/sup -12/ sec. (auth)

• Research Organization: ETH, Zurich
• NSA Number: NSA-15-021548
• OSTI ID: 4074597
• Journal Information: Helvetica Physica Acta (Switzerland), Journal Name: Helvetica Physica Acta (Switzerland) Vol. Vol: 34; ISSN HPACA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

ABSORPTION
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
DECAY
DYSPROSIUM 160
ELECTRONS
ENERGY LEVELS
ERBIUM 166
EVEN EVEN NUCLEI
FERROMAGNETIC MATERIALS
GAMMA RADIATION
GYROMAGNETIC RATIO
HALF-LIFE
INTERACTIONS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETISM
MEASURED VALUES
NUCLEI
ORBITS
PARAMAGNETISM
PHYSICS
ROTATION
SPIN
TERBIUM
VIBRATIONS