NUCLEAR SPECTROSCOPY OF ODD-MASS (161-173) NUCLIDES PRODUCED BY PROTON IRRADIATION OF Er AND Yb

Journal Article · Fri May 15 04:00:00 EDT 1959 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.114.1082· OSTI ID:4217764

Harmatz, B; Handley, T H; Mihelich, J W

To study the effect of nucleon number on nuclear levels of odd-mass rare- earth isotopes, enriched isotopes of Er and Yb were irradiated with protons in the ORNL 86-inch Cyclotron. After chemical separation, the decay chains leading to stable isotopes were analyzed with internal-conversion, photographicrecording, permanent-magnet spectrographs. Precise energy values as well as photometrically measured intensities of conversion lines of 8 to 1600 kev energy were obtained. Very light isotopes of Lu and Tm, each eight mass units from the mass stability line, were produced. The following activities were studied: Tm/sup 161/ (~30 min), Ho/sup 161m/ (E3, 211 kev), Tm/sup 163/ (2 hr), and Lu/sup 167/ (54 min), all previously unreported, as well as Tb/sup 161/, Ho/sup 161/, Tm/sup 165,167/, Yb/sup 167/, Lu/sup 169,171,173/, Hf/ sup 173/, and possibly Yb/sup 169m/. Genetic relationships and partial level schemes for decay chains of massea 151 to 173 are shown. Where comparison is possible, excellent agreement with the predictions of Mottelson and Nilsson is obtained, particularly for the case of the various isotopes of Tb (Z = 65), Ho (Z = 67), and Tm (Z = 69), where striking similarities in the level structure are observed. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.; Univ. of Notre Dame, Ind.
• NSA Number: NSA-13-018539
• OSTI ID: 4217764
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 114; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMICAL REACTIONS
COLLECTIVE MODEL
CYCLOTRONS
DECAY
ELECTRONS
ENERGY
ENERGY LEVEL SCHEMES
ENERGY LEVELS
ENRICHMENT
ERBIUM
EXCITATION
HAFNIUM 173
HALF-LIFE
HOLMIUM 161
INTERNAL CONVERSION
ISOMERS
ISOTOPE SEPARATION
ISOTOPES
LUTETIUM 167
LUTETIUM 169
LUTETIUM 171
LUTETIUM 173
LUTETIUM ISOTOPES
MAGNETIC FIELDS
MEASURED VALUES
NILSSON MODEL
NILSSON-MOTTELSON MODEL
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEI
PHOTOGRAPHIC FILM DETECTORS
PHOTOMETRY
PHYSICS AND MATHEMATICS
PRODUCTION
PROTON BEAMS
RADIOACTIVITY
RARE EARTHS
SPECTRA
SPECTROMETERS
STABILITY
TERBIUM 161
TH
THULIUM 161
THULIUM 163
THULIUM 165
THULIUM 167