Published September 1997
| Version v1
Journal article
A thirty second isomer in 171Hf
Creators
- 1. Schuster Laboratory, University of Manchester, M13 9PL (United Kingdom)
- 2. School of Physics and Space Research, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)
- 3. Accelerator Laboratory, University of Jyvaeskylae, PL 35 Jyvaeskylae SF-403 51 (Finland)
Description
An isomer has been detected in 171Hf with a half-life of T1/2 29.5(9) s. The state was populated in the 170Yb(α,3n)171mHf reaction at a beam energy of Eα = 50 MeV in an on-line ion guide isotope separator. The isomeric 171mHf+ beam was extracted from the ion guide, mass-analysed and implanted in the surface of a microchannel-plate. The half-life of the collected activity was measured from the decay of the microchannel-plate count rate. We associate the isomer with the first excited state in 171Hf with spin 1/2- at an excitation energy of 22(2) keV. (author)
Additional details
Publishing Information
- Journal Title
- Journal of Physics. G, Nuclear and Particle Physics (Online)
- Journal Volume
- 23
- Journal Issue
- 9
- Journal Page Range
- p. 1141-1143
- ISSN
- 1361-6471
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43114074
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ALPHA REACTIONS; HAFNIUM 171; ISOMERIC NUCLEI; ISOMERIC TRANSITIONS; NEUTRONS; SECONDS LIVING RADIOISOTOPES; YTTERBIUM 170 TARGET
- Descriptors DEC
- BARYONS; BETA DECAY RADIOISOTOPES; CHARGED-PARTICLE REACTIONS; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY-LEVEL TRANSITIONS; EVEN-ODD NUCLEI; FERMIONS; HADRONS; HAFNIUM ISOTOPES; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; ISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; RADIOISOTOPES; TARGETS
Optional Information
- Notes
- 8 refs; This record replaces 31045241