Threshold photoneutron spectroscopy of nuclei near A = 140. [9 MeV; E1 and M1 radiative strength functions]

Conference · Wed Oct 01 04:00:00 EDT 1975 · Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)

OSTI ID:7364984

Holt, R J; Jackson, H E

The E1 and M1 radiative strength functions have been measured for nuclei with atomic mass number near A = 140 and at an excitation energy of approximately 9 MeV using the threshold photoneutron technique. A method was developed for extracting the dipole strength even though the first excited state of the daughter nucleus is near the ground state. The photoneutron spectra were measured at laboratory angles of 90/sup 0/ and 135/sup 0/ and with high resolution (0.5 ns/m) using the time-of-flight spectrometer associated with the Argonne high-current linac. In particular the dipole strengths found in /sup 138/Ba and /sup 140/Ce are discussed. These results are compared with theoretical estimates and with the radiative strengths of nuclei in the mass range 50 less than A less than 250. 5 figures (auth)

• Research Organization: Argonne National Lab., IL
• OSTI ID: 7364984
• Conference Information: Journal Name: Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States) Journal Volume: 425
• 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
ALKALINE EARTH ISOTOPES
BARIUM 137
BARIUM 138 TARGET
BARIUM ISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
CERIUM 139
CERIUM 140 TARGET
CERIUM ISOTOPES
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
FERMIONS
FUNCTIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PHOTONEUTRONS
PHOTONUCLEAR REACTIONS
PHOTONUCLEONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
STABLE ISOTOPES
STRENGTH FUNCTIONS
TARGETS