CROSS-SECTION OF THE S-32(ALPHA,P)CL-35 NUCLEAR-REACTION FOR SULFUR DETERMINATION

Differential cross sections of the S-32(alpha, p(x))Cl-35(x = 0, 1, 2, 3) nuclear reactions were measured in the energy range between 6.0 an d 12.0 MeV in steps of 10 to 50 keV for laboratory angles of 60 degree s, 90 degrees, 120 degrees, 135 degrees, 157 degrees and 167 degrees u sing thin sulphur targets. The targets were prepared by sulphur implan tation into carbon with a fluence of 5.0 x 10(17) at./cm(2) and a maxi mum concentration of about 1.5 x 10(17) at./cm(2) in a depth of 50 nm. The location and concentration of the implanted sulphur were determin ed by RBS. The differential cross sections at 167 degrees exhibit a st eep maximum for the alpha-particle energy of 6.90 MeV. The reaction wa s used to determine the concentration of sulphur in different material s.