Laser Spectroscopy of Transuranium Elements

The present paper aims to discuss the prospects for nuclear structure investigation of the transuranium elements by laser spectroscopy. The authors lay stress on two peculiarities of the nuclear structure in this region: The deformed shell closure at neutron number N = 152 and the appearance of superdeformed isomeric states. A laser spectroscopic experimental method is proposed to study these features.     

Hyperfine magnetic anomaly in isotopic pairs <Superscript>151, 152</Superscript>Eu and <Superscript>152, 153</Superscript>Eu

High-resolution laser spectroscopy measurements of optical hyperfine splitting on the ^{151, 152, 153}Eu isotopes were performed on the atomic transition 4f ⁷6s ^{2 8} S _7/2 → 4f ⁷6s6p ⁶ P _5/2 at λ ≈ 564.58 nm. Values of the nuclear magnetic dipole and electric quadrupole moments are obtained from the measured hyperfine splitting and the magnetic hyperfine anomalies in the isotope pairs ^{151, 152}Eu and ^{152, 153}Eu are deduced. The absolute values of the hyperfine anomaly in both cases are unusually large: 5 (1)%. The possible sources causing these anomalies are discussed.     

A semiclassical density functional evaluation of the smoothly varying part of the Hartree–Fock binding energy in atoms

A semiclassical density functional approach is used to evaluate the smooth part of the variation of the Hartree–Fock (HF ) binding energy in atoms, from helium through xenon. The energy density functional is chosen with an improved form for the kinetic energy functional (KEF ). The variation of the HF binding energy is split into smooth and oscillating (shell-structure) parts, in accordance with Strutinskyøs self-consistent averaging procedure, which is equivalent to a semiclassical ?-expansion of the KEF . This enables a well-grounded evaluation of the oscillating part of the HF binding energy, which displays a quasi-periodic behavior expressing clearly the shell structure of atoms. © 1994 John Wiley & Sons, Inc.