Back to Search
Start Over
First search for α decays of naturally occurring Hf nuclides with emission of γ quanta.
- Source :
-
European Physical Journal A -- Hadrons & Nuclei . Jan2020, Vol. 56 Issue 1, p1-10. 10p. - Publication Year :
- 2020
-
Abstract
- The first ever search for α decays to the first excited state in Yb was performed for six isotopes of hafnium (174, 176, 177, 178, 179, 180) using a high purity Hf sample of natural isotopic abundance with a mass of 179.8 g. For 179 Hf, also α decay to the ground state of 175 Yb was searched for thanks to the β -instability of the daughter nuclide 175 Yb. The measurements were conducted using an ultra-low-background HPGe-detector system located 225 m underground. After 75 days of data taking no decays were detected but lower bounds for the half-lives of the decays were derived on the level of lim T 1 / 2 ∼ 10 15 - 10 18 a. The decay with the shortest half-life based on theoretical calculation is the decay of 174 Hf to the first 2 + 84.3 keV excited level of 170 Yb. The experimental lower bound was found to be T 1 / 2 ≥ 3.3 × 10 15 a. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NUCLIDES
*HAFNIUM isotopes
*EXCITED states
Subjects
Details
- Language :
- English
- ISSN :
- 14346001
- Volume :
- 56
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- European Physical Journal A -- Hadrons & Nuclei
- Publication Type :
- Academic Journal
- Accession number :
- 141880581
- Full Text :
- https://doi.org/10.1140/epja/s10050-019-00005-x