Measurement of Gamow-Teller and spin dipole strength in the 45Sc(n,p) 45Ca reaction at 198 MeV

Abstract

The reaction 45Sc(n,p) 45Ca has been studied at an energy of 198 MeV with energy resolution of about 1 MeV. Measurements were carried out at nominal angles 0°, 3°, 6°, 9°, 12°, 15°, 18° and spectra obtained up to ∼40 MeV excitation energy in 45Ca. Significant Gamow-Teller strength is observed at an excitation energy of about 7 MeV, somewhat higher than predicted by shell-model calculations. The strength observed is in agreement with calculations using g A /g V ⋍ 1 . The spin-dipole giant resonance is seen with centroid at about 15 MeV excitation and total cross section of 25 mb/sr at an angle of 6°.