Photodisintegration of heavy nuclei in the energy region above the giant dipole resonance

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778810050029· OSTI ID:21436239

Ermakov, A N; Ishkhanov, B S; Kapitonov, I M; Orlin, V N ^[1]

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1. Moscow State University, Skobeltsyn Institute of Nuclear Physics (Russian Federation)

Experimental data on yields of multiparticle photonuclear reactions (involving the emission of up to seven neutrons from the nucleus involved) on {sup 197}Au, {sup 203,205}Tl, and {sup 209}Bi nuclei in the region extending from the giant dipole resonance to an energy of 67.7 MeV are presented. These data are compared with the results of modern theoretical calculations that take into account both the excitation of a giant dipole resonance (GDR) in a nucleus and the photodisintegration of quasideutrons (QD) in it. By and large, experimental data confirm the results of theoretical calculations-that is, only upon taking simultaneously into account both alternative photodisintegration mechanisms (GDR excitation and QD photodisintegration) can one describe these experimental data. The contribution of QD photodisintegration grows with increasing photon energy and neutron multiplicity and becomes dominant for reactions involving the emission of not less than five neutrons from the nucleus being considered. The integrated cross sections for the processes in question were estimated on the basis of simultaneously employing experimental yields of multinucleon photonuclear reactions and the respective cross-section shapes calculated theoretically.

• OSTI ID: 21436239
• Journal Information: Physics of Atomic Nuclei, Vol. 73, Issue 5; Other Information: DOI: 10.1134/S1063778810050029; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BISMUTH 209
CROSS SECTIONS
EXPERIMENTAL DATA
GIANT RESONANCE
GOLD 197
MEV RANGE 10-100
MULTIPLICITY
NEUTRON EMISSION
NEUTRONS
PHOTONUCLEAR REACTIONS
THALLIUM 203
THALLIUM 205
BARYONS
BISMUTH ISOTOPES
DATA
ELEMENTARY PARTICLES
EMISSION
ENERGY RANGE
FERMIONS
GOLD ISOTOPES
HADRONS
HEAVY NUCLEI
INFORMATION
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
RADIOISOTOPES
RESONANCE
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
THALLIUM ISOTOPES