Beta-delayed proton activities: /sup 147/Dy and /sup 149/Er
The ..beta..-delayed proton spectra of /sup 147/Dy and the hitherto unknown isotope /sup 149/Er were investigated in /sup 12/C bombardments of /sup 142/Nd and /sup 144/Sm, respectively. The /sup 12/C+ /sup 142/Nd data confirm preliminary results of Klepper et al that the /sup 147/Dy delayed-proton spectrum has a high-energy cutoff at approx.5 MeV and is dominated by distinct peaks below 4 MeV in excitation. The proton spectrum following /sup 149/Er decay has a half-life of 9 +- 1 sec and extends from about 2.0 to 6.5 MeV; it has less of the sharp structure observed for /sup 147/Dy. The difference probably arises from the expected lower level density in /sup 147/Tb, a nucleus with one proton outside the /sup 146/Gd core.
- Research Organization:
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
- OSTI ID:
- 6526124
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 30:2; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DATA
DECAY
DYSPROSIUM 147
DYSPROSIUM ISOTOPES
ENERGY LEVELS
ERBIUM 149
ERBIUM ISOTOPES
EVEN-ODD NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
HALF-LIFE
HEAVY ION REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
NEODYMIUM 142 TARGET
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PROTON SPECTRA
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SAMARIUM 144 TARGET
SECONDS LIVING RADIOISOTOPES
SPECTRA
TARGETS