Accession Number : AD0266646

Title :   EVIDENCES FOR OCTUPOLE AND QUADRUPOLE VIBRATIONAL STATES IN PB-205

Corporate Author : NOBEL INST FOR PHYSICS STOCKHOLM (SWEDEN)

Personal Author(s) : BERGSTROM,I. ; BONACALZA,E.C.O. ; THIEBERGER,P.

Report Date : 01 SEP 1961

Pagination or Media Count : 1

Abstract : It is shown by internal conversion coefficient measurements that the 2610 and 2567 keV states in Pb-205 are 9/2 +. It is suggested that the upper state is mainly due to the coupling of the 3- octupole core vibrational state and the 5/2neutron hole ground state. Angular correlation measurements were made between the El gamma rays going from the 2610 keV and 2567 keV states to the 703 keV state, and the 703 keV gamma ray deexciting this state. If the El transitions are both assumed to be pure, it follows that the 703 keV gamma ray is due to 98% E2 radiation and 2% M1 radiation. The strong E2 enhancement in the 703 keV ground state transition (7/2- yields 5/2- ) suggests that the 703 keV state might be due to one phonon quadrupole core vibration coupled to the 5/2- ground state of the odd neutron. There are also some evidences for the 1615 keV state being originated by a similar coupling between the odd neutron ground state and two phonon quadrupole core vibration. (Author)

Descriptors :   *ISOTOPES, *LEAD(METAL), *VIBRATION, ELECTRON TRANSITIONS, EXCITATION, EXPERIMENTAL DATA, HALF LIFE, INELASTIC SCATTERING, MEASUREMENT, NUCLEAR FLUORESCENT SCATTERING, PHONONS, QUADRUPOLE MOMENT, RESONANCE, TABLES(DATA)

Distribution Statement : APPROVED FOR PUBLIC RELEASE