Isotope shifts of 6s5d3D-6s6p1P1 transitions in neutral barium

Dammalapati, U.; De, Sun; Jungmann, K.; Willmann, Lorenz

doi:10.1140/epjd/e2009-00076-x

Cited by 21 publications

(20 citation statements)

References 27 publications

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“…It first agpears that the electronic F factor is much smaller and the A Kms parameter larger than for the three transitions considered above (see Table IV [19], combining our theoretical F factor with the 8{r1 2) and nuclear masses from the literature: A KM S = (($vIS -FS(r2))/({/M -1/M').…”

Section: The Issues Of the Lp? -}Dl 2 Transitionsmentioning

confidence: 73%

“…IScxp F S(r2) ( [19]. In order to do so, we trusted the values of our F factors and adopted the most reliable 8(r2) and the nuclear masses from the literature.…”

Section: Discussionmentioning

confidence: 99%

“…However, the transi tions 6s5d 3£>i -6s6p ]P" and 6s5d 3D 2-6s6/? ]P° are far less studied and the first measurements of their IS were performed by Dammalapati et al [19]. The latter are listed in Table VIII using l38Ba as the pivot.…”

Section: The Issues Of the Lp? -}Dl 2 Transitionsmentioning

confidence: 99%

“…King and Wilson [ 15] used a modified version of the latter program that includes the mass velocity and Darwin terms in order to calculate electron ' [18] calculated the FS and MS of Ba I and Ba ll using second-order manybody perturbation theory to take core-valence and valence correlations into account. Our interest was stimulated by the paper of Dammalapati et al [19], who reported the first laser spectroscopy mea surements of the 6s5d 'D\ 2~6s6p lP° transitions for several isotopes. Observing that the resulting ISs strongly deviate from their expected behavior for odd isotopes in an analysis based on King plots, the authors pointed out that there were no theoretical calculations available for comparison.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical isotope shifts in neutral barium

Nazé

Godefroid

2015

Phys. Rev. A

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The present work deals with a set of problems in isotope shifts of neutral barium spectral lines. Some well known transitions ($6s^2~^1S_0-6s6p~^{1,3}P^o_1$ and $6s^2~^1S_0-6p^2~^3P_0$) are first investigated. Values of the changes in the nuclear mean-square charge radius are deduced from the available experimental isotope shifts using our ab initio electronic factors. The three sets $\{ \delta\langle r^2\rangle^{A,A'}\} $ obtained from these lines are consistent with each other. The combination of the available nuclear mean-square radii with our electronic factors for the $6s5d~^3D_{1,2} -6s6p~^{1}P^o_1$ transitions produces isotope shift values in conflict with the laser spectroscopy measurements of Dammalapati et al. (Eur. Phys. J. D 53, 1 (2009))

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Section: The Issues Of the Lp? -}Dl 2 Transitionsmentioning

confidence: 73%

“…IScxp F S(r2) ( [19]. In order to do so, we trusted the values of our F factors and adopted the most reliable 8(r2) and the nuclear masses from the literature.…”

Section: Discussionmentioning

confidence: 99%

Section: The Issues Of the Lp? -}Dl 2 Transitionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical isotope shifts in neutral barium

Nazé

Godefroid

2015

Phys. Rev. A

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“…A strategy for efficient laser cooling and trapping has been developed with the chemical homologue barium (Ba). Exploiting the strong 6s 2 1 S 0 -6s6p 1 P 1 transition [16,17] resulted in an efficiency of ∼1% for slowing and capturing Ba from an atomic beam, whereas capture efficiencies of below 10 −6 were reported for Ra when using the weak intercombination transition 7s…”

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confidence: 99%

Absolute frequency measurement of the7s2 1S0–7s

et al. 2014

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Transition frequencies were determined for transitions in Ra in an atomic beam and for reference lines in Te2 molecules in a vapor cell. The absolute frequencies were calibrated against a GPS stabilized Rb-clock by means of an optical frequency comb. The 7s 2 1 S0(F = 1/2)-7s7p 1 P1(F = 3/2) transition in 225 Ra was determined to be 621 042 124(2) MHz. The measurements provide input for designing efficient and robust laser cooling of Ra atoms in preparation of a search for a permanent electric dipole moment in Ra isotopes. PACS numbers: 31.30.jp, 11.30.Er, 42.62.Fi, Radium (Ra) is the heaviest alkaline earth metal and it offers unique possibilities for measuring parity and time reversal symmetry violation. The particular atomic and nuclear [1][2][3][4][5][6][7][8] structure in Ra isotopes cause the largest enhancement for permanent electric dipole moments (EDMs) [9] in any atom. This arises from the close proximity of the 7s7p 3 P 1 and 7s6d3 D 2 states [1]. The exploitation of the enhancement from this 5 cm −1 separation requires precise knowledge of Ra atomic properties such as the absolute frequencies of transitions that are relevant for laser cooling and state manipulation (see Fig. 1). Many isotopes of Ra are available from radioactive sources such as 229 Th [10-13], or at online isotope production facilities such as ISOLDE, CERN, Switzerland [14,15].A sensitive search for EDMs requires efficient collection of the atoms in an optical trap because of the low abundance of Ra isotopes. A strategy for efficient laser cooling and trapping has been developed with the chemical homologue barium (Ba). Exploiting the strong 6s 2 1 S 0 -6s6p 1 P 1 transition [16,17] resulted in an efficiency of ∼1% for slowing and capturing Ba from an atomic beam, whereas capture efficiencies of below 10 −6 were reported for Ra when using the weak intercombination transition 7sThe optical spectrum of Ra was first studied by Rasmussen [18]. This identified Ra as an alkaline earth metal. Hyperfine splittings and isotope shifts were determined for the 7s 2 1 S 0 -7s7p 1,3 P 1 transitions by collinear laser spectroscopy [14,15] with intense Ra ion beams at ISOLDE, lifetimes of low lying states were determined in ANL, USA [9,19]; no absolute frequencies are quoted.Here we report on a laser spectroscopy measurement of the frequency of the strong 7s 2 1 S 0 -7s7p

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Symmetries and fundamental interactions—selected topics

Jungmann

2014

Hyperfine Interact

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Isotope shifts of 6s5d3D-6s6p1P1 transitions in neutral barium

Cited by 21 publications

References 27 publications

Theoretical isotope shifts in neutral barium

Theoretical isotope shifts in neutral barium

Absolute frequency measurement of the7s2 1S0–7s

Symmetries and fundamental interactions—selected topics

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