Beta-Detected NQR in Zero Field with a Low Energy Beam of \nuc{8}{Li}$^+$

Z. Salman; R. F. Kiefl; K. H. Chow; W. A. MacFarlane; D. J. Arseneau; S. Daviel; C. D. P. Levy; Y. Maeno; R. Poutissou

doi:10.1016/j.physb.2005.11.168

paper

Beta-Detected NQR in Zero Field with a Low Energy Beam of \nuc{8}{Li} $^{+}$

arXiv:cond-mat/0511356 · doi:10.1016/j.physb.2005.11.168

Abstract

Beta-detected nuclear quadrupole resonances (\bnqr) at zero field are observed using a beam of low energy highly polarized radioactive \nuc{8}{Li} $^{+}$ . The resonances were detected in SrTiO $_{3}$ , Al $_{2}$ O $_{3}$ and Sr $_{2}$ RuO $_{4}$ single crystals by monitoring the beta-decay anisotropy as a function of a small audio frequency magnetic field. The resonances show clearly that \nuc{8}{Li} occupies one site with non-cubic symmetry in SrTiO $_{3}, tw o in A l$ _2 $O$ _3 $an d t h r ees i t es in S r$ _2 $R u O$ _4 $. T h er eso nan ce am pl i t u d e an d w i d t ha r es u r p r i s in g l y l a r g eco m p a r e d t o t h e v a l u ese x p ec t e df r o m t r an s i t i o n s b e tw ee n t h e$ |\pm 2> \leftrightarrow |\pm 1> $s p in s t a t es, in d i c a t in g a s i g ni f i c an t mi x in g b e tw ee n t h e$ |\pm m>$ quadrupolar split levels.

accepted for publication in Physica B

Beta-Detected NQR in Zero Field with a Low Energy Beam of \nuc{8}{Li}+

Abstract

Beta-Detected NQR in Zero Field with a Low Energy Beam of \nuc{8}{Li} $^{+}$