As per AMS 2680 standard for Electron beam welding of Fatigue critical application following defect is mentioned

Undercut and root notches: Where permissible, shall not exceed engineering drawing tolerances. When not specially noted, under cut or root notches shall not exceed 10% of material thickness total and shall be blended to have not less than0.06 in(1.5mm) root radius.

In our cases, we are welding 2mm thick titanium bottle 400mm dia. In the weld slope out region, a weld suck back  zone is occurring. In this region, one edge of the weld root is slightly ejected out. the dimension of this zone width 0.25mm and depth less than 0.2mm over a length of 2-3mm. Actual width of the weld root is 1mm. This dropped zone is having irregular shaped curve (may look like U shaped curve)and other zone of the weld (0.75mm width )is having positive side penetration. If measuring the radius of the profile, we get a radius matching 0.6mm.

My question is 1) is it a root notch?  since it has less than 1.5mm root radius? please give me reply. and also please helps to me where is this root notch terms can be applied?