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

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.125· OSTI ID:6695720

Bingham, C R ^[1]; Kassim, M B; Zhang, M ^[2]; Akovali, Y A; Toth, K S ^[3]; Hamilton, W D ^[4]; Carter, H K ^[5]; Kormicki, J ^[6]; von Schwarzenberg, J; Jarrio, M M ^[7]

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1. University of Tennessee, Knoxville, Tennessee 37996 (United States) Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. University of Tennessee, Knoxville, Tennessee 37996 (United States)
3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
4. Joint Institute of Heavy Ion Research, Oak Ridge, Tennessee 37831 (United States)
5. UNISOR, Oak Ridge Institute of Science and Education, Oak Ridge, Tennessee 37831 (United States)
6. UNISOR, Oak Ridge Institute of Science and Education, Oak Ridge, Tennessee 37831 (United States) Vanderbilt University, Nashville, Tennessee 37325 (United States)
7. Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)

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.

• OSTI ID: 6695720
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 51:1; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663210* -- Ground-State Radioactivity-- (1992-)
663570 -- Nuclear Mass Ranges-- A=150-189-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLATINUM 185
PLATINUM ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
X-RAY SPECTRA