Stokes and anti-Stokes luminescence from the trihalides of Cm-248

The Stokes and anti-Stokes luminescence spectra characteristic of the trihalides of Cm3+ exhibit narrow features arising from transitions between the 5f electronic levels of the Cm3+ ion. The low background associated with anti-Stokes luminescence has allowed our observation of emission features which are ordinarily obscured by matrix scatter and/or matrix luminescence. Comparisons of the emission spectra of the four curium trihalides and corresponding absorption spectra are presented and discussed. (orig.)