Small Aircraft; Low Wing; 2 Eng; Retractable Gear
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 28
Distraction; Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
General None Reported / Taken
Environment - Non Weather Related; Human Factors
Aircraft X was going direct to ZZZZZ [Intersection] landing; so he was in a slow descent I told him to increase the rate; he did. Aircraft Y was climbing on a 300 heading the aircraft were going to be separated and the RA alert made the Aircraft X climb into the Aircraft Y and then forced the Aircraft Y to descend.I should have had a Human [assisting me]; but it's too difficult to speak through a mask and give control instructions.
Center Controller reported an airborne conflict.