Creating a bounce effect

In essence I am creating a platform game, on the screen are three floors, my character (on the ground floor) should hit an obstacle and bounce back a short distance. However the character is bouncing back a long way and I cannot work out how to resolve it.

This is the script I have created

     void OnTriggerEnter2D(Collider2D other)
     {
         if (other.tag == "Player") 
         {
             GameObject[] charaters = GameObject.FindGameObjectsWithTag("Player");
             foreach(GameObject charater in charaters){
                 //get the CharaterControllerScript
                 CharaterControllerScript controlScript = (CharaterControllerScript)charater.GetComponent(typeof(CharaterControllerScript));
                 //stop all charater movement
                 controlScript.Move = 0;
             }
             GameObject charaterCollision = other.gameObject;
             charaterCollision.rigidbody2D.position = new Vector2(1, charaterCollision.rigidbody2D.position.y);
         }
     }

I believe the problem with this is the last line of the "if" statement. I have tried several different options but the character keeps bouncing back to the beginning of the scene.

I need it to only bounce back a few pixels.

NB: I have tried adding a 2d material to the obstacle, but that bounce the character up to the next floor.