2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 16, 489-494 (2003)
DOI: 10.1140/epja/i2002-10108-7

First observation of gamma-rays from the proton emitter $\chem{^{171}Au}$

T. Bäck1, B. Cederwall1, K. Lagergren1, R. Wyss1, A. Johnson1, D. Karlgren1, P. Greenlees2, D. Jenkins3, P. Jones2, D.T. Joss4, R. Julin2, S. Juutinen2, A. Keenan2, H. Kettunen2, P. Kuusiniemi2, M. Leino2, A.-P. Leppänen2, M. Muikku5, P. Nieminen2, J. Pakarinen2, P. Rahkila2 and J. Uusitalo2

1  Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
2  Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40351, Jyväskylä, Finland
3  Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool, L69 7ZE, UK
4  School of Chemistry and Physics, Keele University, Keele, Staffordshire, ST5 5BG, UK
5  STUK - Radiation and Nuclear Safety Authority, P.O. Box 14, 00881 Helsinki, Finland

back@nuclear.kth.se

(Received: 2 September 2002 / Published online: 25 March 2003)

Abstract
Gamma-rays from the alpha- and proton-unstable nuclide $^{171}\mbox{Au}$ have been observed for the first time. The gamma-rays were correlated with both a proton- and an alpha-particle decay branch, confirming that the nucleus decays by alpha and proton emission from a single ( 11/2-) state. The measurement confirms the previously determined half-lives for these particle decays but the present values are of higher precision. In addition, a longer half-life than determined in previous work was measured for the proton-unstable tentative ground state. The results are discussed in relation to structures in neighbouring nuclei and compared with a Strutinsky-type TRS calculation.

PACS
23.50.+z - Decay by proton emission.
23.60.+e - Alpha decay.
23.20.Lv - Gamma transitions and level energies.
21.10.Tg - Lifetimes.

© Società Italiana di Fisica, Springer-Verlag 2003