0+ LEVELS OF EVEN NUCLEI IN THE RARE-EARTH REGION

Journal Article · Tue Mar 01 04:00:00 EST 1960 · Nuclear Phys.

DOI:https://doi.org/10.1016/0029-5582(60)90357-6· OSTI ID:4168420

Marklund, I; van Nooijen, B; Grabowskii, Z

The beta type quadrupole vibrations of deformed nuclei have been found in only a few cases in the heavy element region. A search was started in order to find such levels in the rare-earth region. A 0/sup +/ beta type level at 685.0 kev was found in the deformed nucleus Sm/sup 52/ by measuring conversion coefficients. Its corresponding 0/sup +/ two-Moron type level was observed in Gd/ sup 152/ at 615.3 bew. The strongly deformed nucleus Er/sup 166/ has a 0/sup +/ level at 1460.4 Kev row confirmed by angular correlation measurements. The 1087 kev level in Os/sup 188/ and the 1267 kev level in the sphenical nucleus Pt/sup 194/ were measured by singular correlation to have zero spins, indicating the same trend of the 0/sup +/ levels as theoretically efficted. (A second encited 0/ sup +/ level was found in Os/sup 188/ at 1766 kev and in Pt/sup 194 at 1480 kev.) When the beta and gamma vibrational hands are known, the theoretical and experimental rotationalvibrational coeffcients can be compared: B/sup theory/ = KB/sup exP/. A K-value of 2 to 4 is found, indicating a weeker coupling than that theoretically expected. The experimental trend of levels in even nuclei with A = 50 to 250 is discussed, and some new spin assignments are proposed. (auth)

• Research Organization: Inst. of Physics, Uppsala
• NSA Number: NSA-14-013258
• OSTI ID: 4168420
• Journal Information: Nuclear Phys., Journal Name: Nuclear Phys. Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
COINCIDENCE METHODS
DEFORMATION
ENERGY
ENERGY LEVELS
ERBIUM 166
INTERACTIONS
MEASURED VALUES
NUCLEAR MODELS
NUCLEAR THEORY
NUCLEI
OSMIUM 188
PARITY
PHYSICS
PIONS
PLATINUM 194
QUADRUPOLES
RARE EARTHS
SAMARIUM 152
SPECTRA
SPIN
VIBRATIONS