Hyperfine structure in the 4d states of Rb-like Sr

Abstract

Relativistic coupled-cluster calculations are presented for the low-lying states of the Rb-like ion 87Sr+, of interest as a possible frequency standard. The resulting constants for the magnetic hyperfine stucture were: A(5s) = -1000 MHz, A(5p1/2) = -177 MHz, A(5p3/2) = -35 MHz, A(4d3/2) = -47 MHz and A(4d5/2) = + 1 MHz. As a result of the abnormally small A factor for the 4d5/2 state, the electric and magnetic hyperfine structures are comparable for that state. Electronic factors for the electric hyperfine structure were evaluated for the states with j>1, giving B(5p3/2)/Q = 271 MHz b-1, B(4d3/2)/Q = 115 MHz b-1 and B(4d5/2)/Q = 160 MHz b-1. The calculated B/Q value for the 5p3/2 state was combined with experimental B factors for the isotope sequence 79-93Sr, giving revised values for the nuclear quadrupole moments.

Quadrupole moments and hyperfine constants of metastable states ofCa+,Sr+,Ba

“…A calculated Sternheimer antishielding correction [44] was applied. Some other recent determinations of Q for 87 Sr, based on the measured B factor of the 5p 2 P 3/2 state of 87 Sr + combined with ab initio calculations of the electric field gradient, are 0.327(24) b [45] and 0.323 (20) b [46]. The present Table IV, Step 11. b Relativistic many-body perturbation theory [46].…”

“…The present Table IV, Step 11. b Relativistic many-body perturbation theory [46]. c Relativistic coupled-cluster theory [45]. d Relativistic coupled-cluster theory [26].…”

Year-2008 nuclear quadrupole moments

“…The previous, atomic standard value for Qð 87 Sr) was 335(20) mb. New atomic values of 327(24) mb and 305(2)mb were obtained by Ma˚rtensson-Pendrill [61] and Sahoo [62], respectively. The systems were the 5p and 4d 2 D 5=2 states [63] of Sr þ , respectively.…”

Atomic properties calculated by relativistic coupled-cluster theory without truncation: Hyperfine constants ofMg+,Ca+Mani1, Angom2 2010Phys. Rev. A331471View full textAdd to dashboardCite

“…The DF values of 5p 2 P 1/2 from previous works are −122 [34] and −121.576 [32]. And values for 5p 2 P 3/2 are −21.4 [34] and −21.331 [32].…”