Does the burden of proof in a capital case need to be quantified?

(5) "Neither the cruel and unusual punishment clause of the Eighth Amendment, nor the due process clause of the Fourteenth Amendment, requires that jurors in a capital case be instructed that they must find beyond a reasonable doubt that ... aggravating circumstances outweigh mitigating circumstances.... Indeed, trial courts 'should not instruct the jury regarding any burden of proof or persuasion at the penalty phase.' [Citation.] ' "Unlike the guilt determination, 'the sentencing function is inherently moral and normative, not factual' [citation] and, hence, not susceptible to a burden-of-proof quantification." ' [Citations.]" (People v. Linton, supra, 56 Cal.4th at pp. 12151216, 158 Cal.Rptr.3d 521, 302 P.3d 927.)