TY - JOUR
T1 - Properties of the giant dipole resonance built on the isobaric analog state
AU - Mordechai, S.
AU - Auerbach, N.
AU - Greene, S.
AU - Morris, C. L.
AU - Odonnell, J. M.
AU - Fortune, H. T.
AU - Liu, G.
AU - Burlein, M.
AU - Wuosmaa, A.
AU - Yoo, S. H.
AU - Moore, C. Fred
PY - 1989/1/1
Y1 - 1989/1/1
N2 - Resonances were observed in pion-induced double charge exchange (at T=292 MeV) on C13, Co59, Nb93, Ba138, and Au197 in the continuum at excitation energies of 8.4, 27.5, 33.2, 38.7, and 44.2 MeV, respectively (Q=-27.4, -32.3, -35.8, -38.4, and -46.0 MeV). An angular distribution was measured for the resonance on Nb93 and observed to have a dipole shape. The measured cross sections and the angular distribution agree well with a simple sequential two-step calculation in which the intermediate states arise from single charge exchange to the isobaric analog state and to the giant dipole resonance. Based on their excitation energies, angular distribution for Nb93, and cross sections we identify the resonances as the giant dipoles built on the isobaric analog states. The new data together with the recent observation of the resonance in three other nuclei indicate that the excitation energies, widths, and cross sections for these resonances have a simple mass dependence.
AB - Resonances were observed in pion-induced double charge exchange (at T=292 MeV) on C13, Co59, Nb93, Ba138, and Au197 in the continuum at excitation energies of 8.4, 27.5, 33.2, 38.7, and 44.2 MeV, respectively (Q=-27.4, -32.3, -35.8, -38.4, and -46.0 MeV). An angular distribution was measured for the resonance on Nb93 and observed to have a dipole shape. The measured cross sections and the angular distribution agree well with a simple sequential two-step calculation in which the intermediate states arise from single charge exchange to the isobaric analog state and to the giant dipole resonance. Based on their excitation energies, angular distribution for Nb93, and cross sections we identify the resonances as the giant dipoles built on the isobaric analog states. The new data together with the recent observation of the resonance in three other nuclei indicate that the excitation energies, widths, and cross sections for these resonances have a simple mass dependence.
UR - http://www.scopus.com/inward/record.url?scp=0000395614&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.40.850
DO - 10.1103/PhysRevC.40.850
M3 - Article
AN - SCOPUS:0000395614
SN - 0556-2813
VL - 40
SP - 850
EP - 858
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 2
ER -