Put her back in with the layers, within 30 minutes I bet she is back on the nest that she likes, especially if you put the golf balls there. If so, thank the Gods, go down in the dark, let you chicks sit just a bit in cool night air, they will begin to peep like mad, she should start to come out of the trance. Cover her head with a towel, and set a chick on her back. That chick will slip away and she will begin to move a bit, and her clucking should change, to almost a constant cluck, keep adding chicks till you have them in. Now, one may pop out, and she may give it a heck of a thump, but LEAVE her alone. Go back to the house (it will be hard I know) But they, the chicks and the hen have to make a bond, and they won't if you interfere.
Now for the hormones to work, the chicks peeping and movement under her, changes the hormone level so that now she ceases to be broody, and begins to care for the live chicks. ON the chicks part, warm is good, and they will burrow in tight, which helps the hormones even more. The thing is, if your chicks are too old, they miss this, and will just not bond with the hen, and you are stuck with all the work.
I will be honest, I have lost a few chicks with a broody hen, until they all get it figured out, but then again, I have lost them when I had them in a brooder box too. Some chicks don't thrive.
She will defend them from the layers, and they will grow up right in the flock, feed them all chick starter, and add shells for the layers. The only time I have heard of this not working is if you have quite a ramp to get into the coop. Some chicks don't figure the ramp out, but mine have always been climbing up and over anything in their path almost immediately.
Mrs K