how to make an Explosive rigidbody trigger by another collision box

I have found a code to make an explosive rigid body but how do I make it trigger when I go through another objects trigger collision box?

 var radius = 5.0;
 var power = 10.0;
 function Start () {
     // Applies an explosion force to all nearby rigidbodies
     var explosionPos : Vector3 = transform.position;
     var colliders : Collider[] = Physics.OverlapSphere (explosionPos, radius);
     
     for (var hit : Collider in colliders) {
         if (hit && hit.rigidbody)
             hit.rigidbody.AddExplosionForce(power, explosionPos, radius, 3.0);
     }
 }