Published 1976 | Version v1
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Photon nuclear scattering on lead and bismuth in the region of the giant resonance

Creators

Description

The results of monochromatic photon nuclear scattering studies on natural lead and bismuth targets are presented. The cross sections for the inelastic scattering leading to the first excited levels of 204Pb, 206Pb and 207Pb are important, in agreement with theoretical predictions. The elastic scattering amplitude is related to the total photon absorption by dispersion relations. It is then possible to determine the spin of resonances excited by the reaction studied. Precise measurements carried out between 14 and 20MeV revealed that the angular distribution cannot be explained by a single dipolar resonance. A quadrupolar resonance at E2=14MeV must be introduced

Availability note (English)

MF available from INIS under the Report Number.

Abstract (French)

On presente les resultats de l'etude de la diffusion nucleaire de photons monochromatiques sur des cibles de plomb et de bismuth naturels. On a montre que la section efficace de diffusion inelastique vers les premiers niveaux excites de 204Pb, 206Pb et 207Pb est importante, conformement aux previsions theoriques. D'autre part l'amplitude de diffusion elastique est reliee a l'absorption totale de photons par les relations de dispersion. Il est alors possible de determiner les spins des resonances excitees par la reaction etudiee. Les mesures precises realisees entre 14 et 20MeV ont montre que la distribution angulaire ne pouvait pas s'expliquer par une seule resonance geante dipolaire. Il faut introduire une resonance quadrupolaire d'energie E2=14MeV

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Additional details

Additional titles

Original title (French)
Diffusion nucleaire de photons sur le plomb et le bismuth dans la region de la resonance geante

Publishing Information

Imprint Pagination
187 p.
Report number
FRNC-TH--658

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
8300725
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
ABSORPTION; BISMUTH 209; BISMUTH 209 TARGET; CROSS SECTIONS; DISPERSION RELATIONS; ELASTIC SCATTERING; EXCITED STATES; GIANT RESONANCE; INELASTIC SCATTERING; LEAD 204; LEAD 204 TARGET; LEAD 206; LEAD 206 TARGET; LEAD 207; LEAD 207 TARGET; LEAD 208; LEAD 208 TARGET; MEV RANGE 10-100; PHOTONUCLEAR REACTIONS; RESONANCE; SPIN
Descriptors DEC
ALPHA DECAY RADIOISOTOPES; ANGULAR MOMENTUM; BISMUTH ISOTOPES; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY NUCLEI; HOURS LIVING RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LEAD ISOTOPES; MEV RANGE; NUCLEAR REACTIONS; NUCLEI; ODD-EVEN NUCLEI; PARTICLE PROPERTIES; RADIOISOTOPES; SCATTERING; SECONDS LIVING RADIOISOTOPES; STABLE ISOTOPES; TARGETS; YEARS LIVING RADIOISOTOPES