title: Electric quadrupole moments of the D states of alkaline-earth-metal ions.
abstract: The electric quadrupole moment for the 4d(2)D(5/2) state of (88)Sr(+); one of the most important candidates for an optical clock, has been calculated using the relativistic coupled-cluster theory. This is the first application of this theory to determine atomic electric quadrupole moments. The result of the calculation is presented and the important many-body contributions are highlighted. The calculated electric quadrupole moment is (2.94 +/- 0.07)ea(2)(0), where a(o) is the Bohr radius and the electronic charge while the measured value is (2.6 +/- 0.3) ea(2)(0). This is so far the most accurate determination of the electric quadrupole moment for the above mentioned state. We have also calculated the electric quadrupole moments for the metastable 4d(2)D(3/2) state of 88(Sr(+) and for the 3d(2)D(3/2.5/2) and 5d(2)D(3/2.5/2) states of (43)Ca(+) and (138)Ba(+), respectively.
authors.affiliation: Non-Accelerator Particle Physics Group, Indian Institute of Astrophysics, Bangalore.
authors.forename: Chiranjib
authors.initials: C
authors.lastname: Sur
authors.forename: K V P
authors.initials: KV
authors.lastname: Latha
authors.forename: Bijaya K
authors.initials: BK
authors.lastname: Sahoo
authors.forename: Rajat K
authors.initials: RK
authors.lastname: Chaudhuri
authors.forename: B P
authors.initials: BP
authors.lastname: Das
authors.forename: D
authors.initials: D
authors.lastname: Mukherjee