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Article
Title	Collinear Resonance Ionization Spectroscopy of Neutron-Deficient Francium Isotopes
Author(s)	Flanagan, K T (Manchester U.) ; Franchoo, S (Orsay, IPN) ; Ruiz, R F Garcia (Leuven U.) ; Budincevic, I (Leuven U.) ; Procter, T J (Manchester U.) ; Fedosseev, V N (CERN) ; Lynch, K M (Manchester U. ; CERN) ; Cocolios, T E (Manchester U. ; CERN) ; Marsh, B A (CERN) ; Neyens, G (Leuven U.) ; Strashnov, I (Manchester U.) ; Stroke, H H (New York U.) ; Rossel, R E (CERN ; Mainz U., Inst. Phys.) ; Heylen, H (Leuven U.) ; Billowes, J (Manchester U.) ; Rothe, S (CERN) ; Bissell, M L (Leuven U.) ; Wendt, K D A (Mainz U., Inst. Phys.) ; de Groote, R P (Leuven U.) ; De Schepper, S (Leuven U.) Εμφάνιση και των 20 συγγραφέων
Publication	2013
In:	Phys. Rev. Lett. 111 (2013) 212501
DOI	10.1103/PhysRevLett.111.212501
Subject category	Other Fields of Physics
Abstract	The magnetic moments and isotope shifts of the neutron-deficient francium isotopes Fr202-205 were measured at ISOLDE-CERN with use of collinear resonance ionization spectroscopy. A production-to-detection efficiency of 1\% was measured for Fr-202. The background from nonresonant and collisional ionization was maintained below one ion in 10(5) beam particles. Through a comparison of the measured charge radii with predictions from the spherical droplet model, it is concluded that the ground-state wave function remains spherical down to Fr-205, with a departure observed in Fr-203 (N = 116).

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