Electric dipole transitions from neutron capture in /sup 173/Yb resonances

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.25.1283· OSTI ID:5524008

Shahal, O; Raman, S; Slaughter, G G; Coceva, C; Stefanon, M

Primary neutron capture ..gamma.. rays have been studied from 49 neutron resonances in /sup 173/Yb in the 10--530 eV energy range. These resonances are assigned J = 2 and J = 3 on the basis of the intensity ratios of suitable pairs of low-energy ..gamma.. rays. The measured intensities of the high-energy primary ..gamma.. rays have been converted to partial radiation widths. These widths have been subjected to a correlation analysis against reduced neutron widths, with the result that convincing evidence was not found for previously reported nonstatistical behavior in this nucleus. The ratio of the average population of a particular low-lying level from J = 3 resonances to its population from J = 2 resonances was found to be in satisfactory agreement with a cascade model. Resonances in the 10--200 eV range were noted to exhibit an enhancement of E1 transition probabilities to K = 2 final states as compared to K = 0 states. A level scheme for /sup 174/Yb was constructed, and the neutron separation energy for this nucleus was deduced as 7464.5 +- 1.0 keV.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 5524008
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 25:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BARYON REACTIONS
BINDING ENERGY
CAPTURE
E1-TRANSITIONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
EVEN-EVEN NUCLEI
GAMMA SPECTRA
HADRON REACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MULTIPOLE TRANSITIONS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARITY
PARTICLE PROPERTIES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPECTRA
SPIN
STABLE ISOTOPES
TARGETS
YTTERBIUM 173 TARGET
YTTERBIUM 174
YTTERBIUM ISOTOPES