Tickets only have a single department. So no you cannot have a ticket have more than one department... And cannot have alerts go to more than one department since the ticket only has one.
What you can do is have alerts go to the department and the manager of that department. And the manager account (could be a fake account that doesn't get used) and is configured to be a mailing list of the managers for that department.
Also 1.6ST is ancient and no longer supported.
