Calculations of the Giant-Dipole-Resonance Photoneutrons Using a Coupled EGS4-Morse Code

SLAC-PUB-95-6764 (October 1995) CALCULATIONS OF THE GIANT-DIPOLE-RESONANCE PHOTONEUTRONS USING A COUPLED EGS4-MORSE CODE

CALCULATIONS OF THE GIANT-DIPOLE-RESONANCE PHOTONEUTRONS USING A COUPLED EGS4-MORSE CODE J. C. Liu, W. R. Nelson, K. R. Kase and X. S. Mao Stanford Linear Accelerator Center, P. 0. Box 4349, Stanford, CA 94309 Abstract The production and transport of the photoneutrons from the giant-dipoleresonance reaction have been implemented in a coupled EGS4-MORSE code. The total neutron yield (including b...

The Giant Nuclear Dipole Resonance

above the ground state, where a rough calculation indicates S'6 =80 Mev, a result which is in agreement with the experimentally observed position of the giant resonance. We find the p-ray width of this level to be proportional to A&, and use the width to obtain the cross sections for absorption and scattering of y rays in this region. Throughout we have neglected certain effects of the (r 'r, &...

Population of Isomers in Decay of the Giant Dipole Resonance

The value of an isomeric ratio (IR) in N=81 isotones (137Ba, 139Ce, 141Nd and 143Sm) is studied by means of the (γ, n) reaction. This quantity measures a probability to populate the isomeric state in respect to the ground state population. In (γ, n) reactions, the giant dipole resonance (GDR) is excited and after its decay by a neutron emission, the nucleus has an excitation energy of a few MeV...

Excitation-energy dependence of the giant dipole resonance width.

High-energy y rays have been measured in coincidence with heavy fragments in deeply inelastic reactions of ' 6xe+ Ti at 18.5 MeV/nucleon. The giant dipole resonance (GDR) strength function is deduced from an analysis of the photon spectra within the statistical model. The GDR width I is studied as a function of the fragment excitation energy E*. A saturation at about I =10 MeV is observed for E...

Sensitivity of the Isoscalar Giant Dipole Resonance to Optical Potentials