This process produces stable isotopes by moving along the valley of beta-decay stable isobars in the chart of isotopes. The s-process produces approximately half of the isotopes of the elements heavier than iron, and therefore plays an important role in the galactic chemical evolution. The more rapid r-process differs from the s-process by its faster rate of neutron capture of more than one neutron before beta-decay takes place.
In his four seasons in the NFL, Jackson rushed for 2,782 yards and 16 touchdowns with an average yards per carry of 5.4. He also caught 40 passes for 352 yards and two touchdowns. Jackson's 221 yards on November 30, 1987, just 29 days after his first NFL carry, is still a Monday Night Football record.
Jim Brown rushed for more than 1,000 yards seven times. In his initial season under new coach Blanton Collier, Brown became the first back to run for more than a mile as he gained 1,863 yards. He led the league with 1,446 yards in 1964 as the Browns won the NFL championship.