Beam Rifle disintergration effects?

Only at lvl 7 or 8 and i do love beam rifle. how does disintergration work? Does it have different effects based on what power you use to cause the follow-up effect?

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(edit: in short, the answer to your question is a simple "yes")

On its own it's a fairly long (by this game's standards) damage-over-time.

While a target is affected by disintegration (whether yours or someone elses) your other attacks will have additional effects. In most cases the additional effect is bonus damage (either immediate or damage-over-time), though there's also debuff and mez on offer.

Each Beam Rifle power description will tell you what that power's bonus effect will be when the target is affected by disintegration (it's in the detailed info too, though that may require a bit of interpretation).