M1 and E1 transition strength near threshold in /sup 140/Ce

Journal Article · Tue Jun 01 00:00:00 EDT 1976 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.13.2257· OSTI ID:7352371

Laszewski, R M; Holt, R J; Jackson, H E

The /sup 140/Ce(..gamma..,n)/sup 139/Ce reaction has been studied near threshold with high energy resolution. The angular distribution of photoneutrons was measured at 90degree and 135degree, and the M1 and E1 strength functions at an excitation of approximately 9.1 MeV were determined. The measured integrated M1 strength was found to be consistent with the existence of a giant M1 resonance centered at 8.7 MeV as suggested both by calculation and previous electron scattering data. The integrated E1 strength was also found to be consistent with what is known of the E1 strength function in the threshold region. (AIP)

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 7352371
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 13:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651725* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
BETA DECAY RADIOISOTOPES
CERIUM 139
CERIUM 140 TARGET
CERIUM ISOTOPES
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DIPOLES
DIRECT REACTIONS
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
ENERGY RESOLUTION
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FERMIONS
FUNCTIONS
GIANT RESONANCE
HADRONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KNOCK-OUT REACTIONS
MAGNETIC DIPOLES
MEV RANGE
MEV RANGE 01-10
MINUTES LIVING RADIOISOTOPES
MULTIPOLES
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PHOTONEUTRONS
PHOTONUCLEAR REACTIONS
PHOTONUCLEONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RESOLUTION
RESONANCE
STRENGTH FUNCTIONS
TARGETS
THRESHOLD ENERGY