"Maybe even wants to die?"
The older I get the more I come to believe that a death wish is a big part of alcoholism.
But there's also a part of her that wants to live, or she wouldn't have reached 44.
It's been mentioned to have her committed. That's certainly a reasonable approach at this extremity. Since she's your ex-wife that might prove problematic. But perhaps she'd go into care voluntarily? You may have more influence over her than you think; she may just go along with what you decide.