Laser fluorescence on radio-active isotopes produced in very low yield |
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| Authors: | M P Dancy J Billowes I S Grant D E Evans J A R Griffith S A Wells D A Eastham J Groves J R H Smith D W L Tolfree P M Walker |
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| Institution: | (1) Physics Department, Manchester University, M13 9PL Manchester, UK;(2) Physics Department, Birmingham University, B15 2TT Birmingham, UK;(3) SERC Daresbury Laboratory, Daresbury, WA4 4AD Warrington, UK;(4) Physics Department, Surrey University, GU2 5XH Guildford, UK |
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| Abstract: | East particle-photon coincidence techniques, developed at Daresbury with strontium isotopes, allow ultrasensitive laser fluorescence
spectroscopy of beams of radio-active isotopes which can only be produced in very low yields. The technique has now been applied
to neutron-deficient barium isotopes down to120Ba. From measured hyperfine splittings and isotope shifts, nuclear moments and changes in mean square radii have been determined.
The work has revealed an abrupt increase in the mean square radius for121Ba large enough to disrupt the systematic staggering of nuclear size seen for the series. In a recent experiment an isomeric
state of127Ba with a half-life of about 2 seconds has been produced in a very low yield; nevertheless we have succeeded in obtaining
a fluorescence spectrum. |
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