Linear polarization of the continuum. gamma. rays feeding high-spin yrast states in /sup 151/ /sup 152/Dy and /sup 156--158/Er

Journal Article · Mon Oct 01 04:00:00 EDT 1979 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.43.991· OSTI ID:5936673

Trautmann, W; Sharpey-Schafer, J F; Andrews, H R; Haas, B; Haeusser, O; Taras, P; Ward, D

We have measured the linear polarization, P/sub ..gamma../, of continuum ..gamma.. rays for /sup 151,152/Dy and /sup 156en-dash158/Er produced through (/sup 32/S,xn) reactions. We find that P/sub ..gamma../ approx. = 0.35 for E/sub ..gamma../ < or = 1.2 MeV in the rotational Er nuclei and, in contrast, that P/sub ..gamma../ approx. = 0.05 doe E/sub ..gamma../ < or = 1.0 MeV in the oblate Dy isotopes. This, taken together with the spectrum shapes of the contiuum ..gamma.. rays, suggests a rather direct feeding of the yrast states by statistical cascades. The Dy data for 1.0 < or = E/sub ..gamma../ < or = 1.5 MeV indicate collective rotations at spin I>40h.

• Research Organization: Chalk River Nuclear Laboratories, Atomic Energy of Canada Limited, Chalk River, Ontario K0J 1J0, Canada
• OSTI ID: 5936673
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 43:14; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

651723* -- Nuclear Properties &amp; Reactions
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651725 -- Nuclear Properties &amp; Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COLLECTIVE MODEL
COMPOUND-NUCLEUS REACTIONS
DISTRIBUTION
DYSPROSIUM 151
DYSPROSIUM 152
DYSPROSIUM ISOTOPES
ENERGY LEVELS
ENERGY RANGE
ERBIUM 156
ERBIUM 158
ERBIUM ISOTOPES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITED STATES
GAMMA SPECTRA
HEAVY ION REACTIONS
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PARTICLE PROPERTIES
POLARIZATION
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
ROTATIONAL STATES
SPECTRA
SPIN
SULFUR 32 REACTIONS
TARGETS
TELLURIUM 130 TARGET
TIN 124 TARGET
YRAST STATES