Particle-hole strength excited in theCa48(p,n)48

Theoretical investigation of two-particle two-hole effects on spin-isospin excitations through charge-exchange reactions

“…It does not couple to other 1p1h states having T A ± 1; i.e., the 2p2h effect is expected to be small for the Fermi transition as seen in outgoing neutron spectra of (p, n) reactions (see, for example, Ref. [14]). Therefore we investigate the Fermi transition just to demonstrate our theoretical framework.…”

Excitation of6−and7+stretched states in theAnderson1, Baldwin2, Garcia3 et al. 1992Phys. Rev. CSelf Cite

“…The experimental arrangement and datareduction procedures were similar to those described previously [19,24]. Neutron kinetic energies were measured by the time-of-flight (TOF) technique.…”

“…This long time between bursts eliminates "overlap" background from previous beam bursts and greatly reduces the cosmic-ray background as well. Neutrons were detected in three detector stations at 0, 24 on the two ends of the scintillator bar, coupled to 12.76cm-diameter phototubes. Timing signals were derived from each end and combined in a meantimer circuit [26] to provide the timing signal from each detector.…”

“…The spectra were fitted with an improved version of the Gaussian peak-fitting code of Bevington [28]. Examples of peak fitting of similar (p, n) neutron TOF spectra were presented earlier [24,25]. Cross sections were obtained by combining the yields with the measured geometrical parameters, the beam integration, and the target thickness.…”

“…The experimental procedure and data reduction are similar to that described in more detail in Refs. [19] and [24].…”