This article examines what has happened to the personal effects of Marie Curie, the "Mother of Modern Physics".
Still, after more than 100 years, much of Curie's personal effects including her clothes, furniture, cookbooks, and laboratory notes remain contaminated by radiation, the Christian Science Monitor reports.Regarded as national and scientific treasures, Curie's laboratory notebooks are stored in lead-lined boxes at France's national library in Paris.While the library allows visitors to view Curie's manuscripts, all guests are expected to sign a liability waiver and wear protective gear as the items are contaminated with radium 226, which has a half-life of about 1,600 years, according to Christian Science Monitor.
What they didn't report, and this is where the devil-is-in-the-details part is missing, is what level of radioactivity is given off by these objects. You just don't want to sign something and not know the level you will be exposed to (which, btw, if you work in the US or at a US National Lab, a RWP (radiation work permit) must be posted at the door detailing the type of radiation and the level of radiation at a certain distance).
I suspect that this level is just slightly above background, and that's why they are isolated, but not large enough for concern. Still, the nit-picker in me would like to know such details!