I do have a few papers published during my Ph.D study. Citations are not strong though. Do you think that can be outstanding and counted for some experience?
Well, do you think these few papers are astounding?
You know, if you are yourself not convinced that they are outstanding, no need to mention them as such! If you do, you will have to find convincing arguments. They better convince you first if you want to convince the adjudicator!
As for experience in a different research field, it is not likely to count as contribution in the field in which you claim to be outstanding. There is nothing like a multi-field petition that I know of. However, it you demonstrated qualities (like leadership or...), you could use it as an evidence of that quality, while recognizing yourself that it is in another field but still worth mentioning.
Chris