First On-Line Laser Spectroscopy of Radioisotopes of a Refractory Element

J. M. G. Levins; D. M. Benton; J. Billowes; P. Campbell; T. G. Cooper; P. Dendooven; D. E. Evans; D. H. Forest; I. S. Grant; J. A. R. Griffith; J. Huikari; A. Jokinen; K. Peräjärvi; G. Tungate; G. Yeandle; J. Äystö

doi:10.1103/PhysRevLett.82.2476

First On-Line Laser Spectroscopy of Radioisotopes of a Refractory Element

J. M. G. Levins, D. M. Benton, J. Billowes, P. Campbell, T. G. Cooper, P. Dendooven, D. E. Evans, D. H. Forest, I. S. Grant, J. A. R. Griffith, J. Huikari, A. Jokinen, K. Peräjärvi, G. Tungate, G. Yeandle, and J. Äystö

Phys. Rev. Lett. 82, 2476 – Published 22 March 1999

Abstract

The first fully on-line isotope shift measurement of a radioactive refractory element is reported. Collinear laser-induced fluorescence measurements were made on the radioactive isotopes $^{170, 172, 173, 174} Hf$ produced with a flux of $2 - 3 \times 10^{3}$ ions per second from an ion-guide fed isotope separator. The method may be applied to all elements and isomers with lifetimes as short as 1 ms. The systematics of the new charge radii measurements are well reproduced by theory, with the maximum deformation in the chain occurring significantly below the midshell.

Received 9 October 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.2476

Authors & Affiliations

J. M. G. Levins¹, D. M. Benton², J. Billowes¹, P. Campbell¹, T. G. Cooper¹, P. Dendooven³, D. E. Evans², D. H. Forest², I. S. Grant¹, J. A. R. Griffith², J. Huikari³, A. Jokinen³, K. Peräjärvi³, G. Tungate², G. Yeandle¹, and J. Äystö³

¹Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
²School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
³Department of Physics, Accelerator Laboratory, University of Jyväskylä, PL 35, Jyväskylä SF-40351, Finland