what does the magnitude of RDF signify

Hi all

I have some questions about RDF. What does't the magnitude of RDF signify? I'm reproducing the results of a published paper. I used the same model, used the same computational methods. My RDF curves have the same shape with those in the paper, but the magnitude is several times larger than that in the paper. How is that happening? I did something wrong with the methods or the analysis process?

Thank you

JIngjing