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The 48Ca({\gamma},n) cross section was measured using {\gamma}-ray beams ofenergies between 9.5 and 15.3 MeV generated at the Triangle UniversitiesNuclear Laboratory (TUNL) high-intensity {\gamma}-ray source (HI{\gamma}S).Prior to this experiment, no direct measurements had been made with{\gamma}-ray beams of sufficiently low energy spread to observe structure inthis energy range. The cross sections were measured at thirty-four different{\gamma}-ray energies with an enriched 48Ca target. Neutron emission is thedominant decay mechanism in the measured energy range that spans fromthreshold, across the previously identified M1 strength, and up the low-energyedge of the E1 giant dipole resonance (GDR). This work found B(M 1) = 6.8 \pm0.5 {\mu}N2 for the 10.23 MeV resonance, a value greater than previouslymeasured. Structures in the cross section commensurate with extendedrandom-phase approximation (ERPA) calculations have also been observed whosemagnitudes are in agreement with existing data.

Measurements of the 48Ca({\gamma},n) Reaction