[alpha]-decay rates for [sup 181-186]Au and [sup 181-185]Pt isotopes

[alpha]-decay rates for [sup 181-186]Au and [sup 181-185]Pt isotopes

A systematic study of the [alpha] decay of [sup 181[minus]186]Au utilizing an on-line isotope separator has revealed several [alpha] groups and resulted in the observation of the [alpha] decay of [sup 186]Au and [sup 185]Pt. By simultaneous measurement of [gamma]-ray and x-ray spectra and use of kno...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Vol. 51:1
Main Authors: Bingham, C.R., Kassim, M.B., Zhang, M., Akovali, Y.A., Toth, K.S., Hamilton, W.D., Carter, H.K., Kormicki, J., von Schwarzenberg, J., Jarrio, M.M.
Format: Journal Article
Language:English
Published: United States 01-01-1995
Subjects:
663110 > General & Average Properties of Nuclei & Nuclear Energy Levels > (1992-)
663570 > Nuclear Mass Ranges > A=150-189 > (1992-)
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
COINCIDENCE METHODS
COUNTING TECHNIQUES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
EVEN-ODD NUCLEI
GAMMA SPECTRA
GOLD 181
GOLD 183
GOLD 185
GOLD 186
GOLD ISOTOPES
GROUND STATES
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IRIDIUM 177
IRIDIUM ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLATINUM 185
PLATINUM ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA 663210 > Ground-State Radioactivity > (1992-)
X-RAY SPECTRA
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Summary:A systematic study of the [alpha] decay of [sup 181[minus]186]Au utilizing an on-line isotope separator has revealed several [alpha] groups and resulted in the observation of the [alpha] decay of [sup 186]Au and [sup 185]Pt. By simultaneous measurement of [gamma]-ray and x-ray spectra and use of known EC/[beta][sup +] decay schemes, [alpha]-decay branching ratios and hindrance factors were deduced for each [alpha] transition. In [sup 185]Au and [sup 183]Au the ground state is known to be dominated by the 5/2[sup [minus]],1/2[541] configuration associated with the [ital h][sub 9/2] intruder from above the [ital Z]=82 closed shell. Thus, the unhindered [alpha] decay of these parents identify levels in the Ir daughters which also are dominated by the [ital h][sub 9/2] orbital. Several previously unknown low-lying [gamma]-ray transitions were observed in the Ir daughters by means of [alpha]-[gamma] coincidence measurements. The hindrance factor for the [alpha] decay of [sup 181]Au to the 5/2[sup [minus]],1/2[541] ground state of [sup 177]Ir suggests that the ground state of [sup 181]Au has a different configuration than those of [sup 183]Au and [sup 185]Au.
Bibliography:None
ISSN:0556-2813
1089-490X
DOI:10.1103/PhysRevC.51.125