Yes, there are two ways I can think of:
1.) Make your directory a subdirectory of SYS:LOGIN, and change the IRF for that directory to only permit Filescan rights (and, of course, Supervisory).
2.) Create a new directory and allow GUEST to viewthe contents. This would require:
a.) GUEST account enabled with no password, which will force you to audit GUEST rights across the server to eliminate undesired access.
b.) Create a new directory, probably at the top level, such as VOLPUB:PUB, and
grant Filescan rights to user GUEST, then Read/Filescan/eXecute to group EVERYONE.
c.) Remember to remove GUEST from group EVERYONE, and block GUEST out of all other areas.
Either of these approaches _should_ allow a user to access the server without logging-on and browse, but not read/execute/copy the contents.