CERN Accelerating science

Article
Report number	arXiv:2105.10549
Title	Isotope Shifts of Radium Monofluoride Molecules
Author(s)	Udrescu, S.M. (MIT) ; Brinson, A.J. (MIT) ; Ruiz, R.F. Garcia (MIT ; CERN) ; Gaul, K. (Philipps U. Marburg) ; Berger, R. (Philipps U. Marburg) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Breier, A.A. (Kassel U.) ; Chrysalidis, K. (CERN) ; Cocolios, T.E. (Leuven U.) ; Cooper, B.S. (Manchester U.) ; Flanagan, K.T. (Manchester U. ; U. Manchester (main)) ; Giesen, T.F. (Kassel U.) ; de Groote, R.P. (Jyvaskyla U.) ; Franchoo, S. (Orsay, IPN) ; Gustafsson, F.P. (Leuven U.) ; Isaev, T.A. (Kurchatov Inst., Moscow ; PNPI, CSTD) ; Koszorús, Á. (Leuven U.) ; Neyens, G. (CERN ; Leuven U.) ; Perrett, H.A. (Manchester U.) ; Ricketts, C.M. (Manchester U.) ; Rothe, S. (CERN) ; Vernon, A.R. (Manchester U.) ; Wendt, K.D.A. (Mainz U., Inst. Phys.) ; Wienholtz, F. (CERN ; Greifswald U.) ; Wilkins, S.G. (MIT ; CERN) ; Yang, X.F. (Peking U., SKLNPT)
Publication	2021-07-14
Imprint	2021-05-21
Number of pages	7
In:	Phys. Rev. Lett. 127 (2021) 033001
DOI	10.1103/PhysRevLett.127.033001 (publication)
Subject category	physics.atom-ph ; Other Fields of Physics ; nucl-th ; Nuclear Physics - Theory ; nucl-ex ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN ISOLDE
Abstract	Isotope shifts of $^{223-226,228}$Ra$^{19}$F were measured for different vibrational levels in the electronic transition $A^{2}{}{\Pi}_{1/2}\leftarrow X^{2}{}{\Sigma}^{+}$. The observed isotope shifts demonstrate the particularly high sensitivity of radium monofluoride to nuclear size effects, offering a stringent test of models describing the electronic density within the radium nucleus. Ab initio quantum chemical calculations are in excellent agreement with experimental observations. These results highlight some of the unique opportunities that short-lived molecules could offer in nuclear structure and in fundamental symmetry studies.
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