WHILE ENGAGED IN A HOVER THE ATP RATED PILOT, WHO HAD ONLY 9.0 HOURS OF ROTORCRAFT TIME OF WHICH 3.5 HOURS WERE SOLO, ALLOWED THE HELICOPTER TO DESCEND AND SLIP AFT. DURING THE ENSUING GROUND COLLISION THE HELICOPTER ROLLED OVER AND THE MAIN ROTOR BLADES IMPACTED THE GROUND. THE PILOT REPORTED THAT HE DIVERTED HIS ATTENTION TO A DEPARTING BUSINESS JET DURING WHICH TIME THE GROUND COLLISION OCCURRED.