Collinear laser spectroscopy of neutron-rich cerium isotopes

doi:10.1088/0954-3899/29/11/003

Collinear laser spectroscopy of neutron-rich cerium isotopes near the N = 88 shape transition

B Cheal et al 2003 J. Phys. G: Nucl. Part. Phys. 29 2479-2484 doi: 10.1088/0954-3899/29/11/003

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B Cheal¹, M Avgoulea², J Billowes², P Campbell², K T Flanagan², D H Forest¹, M D Gardner¹, J Huikari³, B A Marsh², A Nieminen³, H L Thayer¹, G Tungate¹ and J Äystö³
¹ School of Physics and Astronomy, The University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
² Schuster Laboratory, The University of Manchester, Manchester M13 9PL, UK
³ Department of Physics, University of Jyväskylä, PB 35 (YFL) FIN-40351 Jyväskylä, Finland
E-mail: bc@np.ph.bham.ac.uk

Abstract. Laser spectroscopy has been used to measure the isotope shifts of ¹⁴⁶Ce and ¹⁴⁸Ce relative to ¹⁴⁴Ce, Z = 58. The new data, in combination with existing optical data on the stable isotopes and radioactive ¹⁴⁴Ce isotope, permits a study of charge radii variations for the even-N Ce nuclei from N = 78 to N = 90. This range covers both the N = 82 shell closure and the N = 88 shape transition region. A marked increase in deformation occurs at N = 88 for elements with Z ≥ 60 but not for those with Z ≤ 56. The new data for Ce (Z = 58) show an intermediate behaviour, resulting in a smooth increase in deformation with Z in the N = 88, 90 region.

Print publication: Issue 11 (November 2003)
Received 15 July 2003
Published 6 October 2003

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Collinear laser spectroscopy of neutron-rich cerium isotopes near the N = 88 shape transition

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