‘‘Atomic’’ determination of the ${}^{23}{Na}$ , ${}^{25}{Mg}$ , and ${}^{27}{Al}$ nuclear quadrupole moments: How accurate are the ‘‘muonic’’ values?

The quadrupole moments of

{}^{23}{Na}

and

{}^{27}{Al}

are determined by combining the calculated electric-field gradients of Na(3p

;^{2}

P°) and Al(3p

;^{2}

P°) with experimental quadrupole coupling constants. Q

(^{25}

Mg) was determined previously using the same method [Nucl. Phys. A534, 360 (1991)]. Contrary to Q

(^{25}

Mg) the ‘‘atomic’’ values for Q

(^{23}

Na) and Q

(^{27}

Al) lie outside the error limits of the ‘‘muonic’’ values. The obtained values for Q

(^{23}

Na), Q

(^{25}

Mg), and Q

(^{27}

Al) are 0.1089(32), 0.1994(20), and 0.1402(10) b, respectively, as compared to the muonic values of 0.1006(20), 0.201(3), and 0.150(6) b.

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‘‘Atomic’’ determination of theNa23,Mg25, andAl27nuclear quadrupole moments: How accurate are the ‘‘muonic’’ values?