“A person born before Jan. 2, 1954, and who has reached her/his full retirement age, can file for just the divorced spouse’s benefit and delay claiming her/his retirement benefit until a later date.”
Must be at least 62 and the ex-spouse must be entitled to Social Security. The ex-spouse doesn’t have to be collecting a benefit. The divorce must have been at least 2 years prior.
You can’t collect two benefits at the same time.
Source: Financial Planning for Women