Precision measurements of proton emission from the ground states of {sup 156}Ta and {sup 160}Re

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.064320· OSTI ID:21502780

Darby, I G; Page, R D; Joss, D T; Bianco, L; Grahn, T; Judson, D S; Simpson, J; Eeckhaudt, S; Greenlees, P T; Jones, P M; Julin, R; Juutinen, S; Ketelhut, S; Leino, M; Leppaenen, A -P; Nyman, M; Rahkila, P; Saren, J; Scholey, C; Steer, A N ^[1]

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1. Department of Physics, University of Liverpool, Liverpool L69 7ZE (United Kingdom)

The decays of the {pi}d{sub 3/2} ground states of {sup 156}Ta and {sup 160}Re have been studied in detail using the GREAT spectrometer. More than 7000 {sup 160}Re nuclei were produced in reactions of 290- and 300-MeV {sup 58}Ni ions with an isotopically enriched {sup 106}Cd target and separated in flight using the RITU separator. The proton and {alpha} decays of the {pi}d{sub 3/2} level were confirmed and the half-life and branching ratios of this state were determined with improved precision to be t{sub 1/2}=611{+-}7 {mu}s and b{sub p}=89{+-}1% and b{sub {alpha}=}11{+-}1%, respectively. The {alpha}-decay branch populated the ground state of {sup 156}Ta, allowing improved values for the proton-decay energy and half-life to be obtained (E{sub p}=1011{+-}5 keV; t{sub 1/2}=106{+-}4 ms). The {beta} decay of this level was identified for the first time and a branching ratio of b{sub {beta}=}29{+-}3% was deduced. The spectroscopic factors deduced from these measurements are compared with predictions.

• OSTI ID: 21502780
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevC.83.064320; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ALPHA DECAY
BETA DECAY
BRANCHING RATIO
CADMIUM 106 TARGET
EMISSION
FORECASTING
GROUND STATES
HALF-LIFE
IONS
KEV RANGE
MEV RANGE
NICKEL 58
PROTONS
RHENIUM 160
SPECTROMETERS
SPECTROSCOPIC FACTORS
TANTALUM 156
ALPHA DECAY RADIOISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
CHARGED PARTICLES
DECAY
DIMENSIONLESS NUMBERS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEASURING INSTRUMENTS
MICROSECONDS LIVING RADIOISOTOPES
MILLISECONDS LIVING RADIOISOTOPES
NICKEL ISOTOPES
NUCLEAR DECAY
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
PROTON DECAY RADIOISOTOPES
RADIOISOTOPES
RHENIUM ISOTOPES
STABLE ISOTOPES
TANTALUM ISOTOPES
TARGETS