Identification of /sup 148/Ho and /sup 149/Ho

Journal Article · Wed Jan 31 23:00:00 EST 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.19.482· OSTI ID:6457986

Toth, K S; Bingham, C R; Zolnowski, D R; Cala, S E; Carter, H K; Sousa, D C

The new nuclides, /sup 148/Ho and /sup 149/Ho, were identified in /sup 10/B bombardments of /sup 144/Sm. A gas-jet system was used to transport product nuclei to a shielded area suitable for ..gamma..-ray measurements. The 21-s isotope, /sup 149/Ho, was found to decay primarily to a /sup 149/Dy level at 1091 keV and less intensely to the i/sub 13/2/ 1073-keV state observed in a previous in-beam ..gamma..-ray study. This radioactivity, in analogy to neighboring odd-A terbium and holmium isotopes, probably represents the h/sub 11/2/ proton orbital in /sup 149/Ho which decays via an allowed ..beta.. transition to the 1091-keV level. The latter, is therefore, proposed to be the h/sub 9/2/ neutron state in /sup 149/Dy. The 9-s isotope, /sup 148/Ho, was identified mainly through a 1688-KeV ..gamma..-ray which: (1)was in coincidence with dysprosium KX rays, (2)increased dramatically in intensity when the /sup 10/B bombarding energy was raised from 85 to 96 MeV, and (3)remained constant (over the same range) in intensity relative to that of the 620-keV ..gamma.. ray known to belong to /sup 148/Dy decay. On the basis of systematics for low-lying levels in even-even N = 82 nuclei, the 1688-keV transition is thought to deexcite the first-excited state in /sup 148/Dy.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 6457986
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 19:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
BORON 10 REACTIONS
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
DATA
DATA FORMS
DECAY
DISCRIMINATORS
DYSPROSIUM 148
DYSPROSIUM 149
DYSPROSIUM ISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELECTRONIC CIRCUITS
ENERGY LEVELS
ENERGY RANGE
ENERGY SPECTRA
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
GAMMA SPECTRA
GRAPHS
HALF-LIFE
HEAVY ION REACTIONS
HOLMIUM 148
HOLMIUM 149
HOLMIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MEV RANGE
MEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SAMARIUM 144 TARGET
SECONDS LIVING RADIOISOTOPES
SPECTRA
TARGETS