Study of the excited states of /sup 187/Pt in the decay of /sup 187/Au (8. 4 min)

Technical Report · Thu Sep 30 04:00:00 EDT 1982

OSTI ID:6335573

Gnade, B E

The decay of /sup 187/Au to /sup 187/Pt has been studied with mass-separated sources from the UNISOR facility. Multiscaled spectra of ..gamma..-rays, x-rays, and conversion electrons were obtained along with ..gamma..-..gamma..-t, ..gamma..-x-t, e/sup -/-..gamma..-t, and e/sup -/-x-t coincidence data. The half life of /sup 187/Au was measured to be 8.4 +- 0.3 min. A decay scheme consisting of 56 excited states and 245 transitions that incorporates 88% of the decay intensity assigned to /sup 187/Au has been constructed. The i/sub 13/2/ band in /sup 187/Pt is populated through low-spin band members in approximately 4% of the decays of /sup 187/Au. Levels at 260, 288, and 507 keV are found to de-excite by EO transitions. The ground-state decay energy is deduced to be Q/sub EC/ = 3.90 +- 0.15 MeV from a ..gamma..-gated ..beta../sup +//EC ratio. The positive parity states in /sup 187/Pt are compared with calculations made with the Lund Model (Larsson et. al., 1978). Also an anion exchange and distillation procedure is described for preparing reactor-produced carrier-free /sup 18/F as K/sup 18/F complexed with 18-crown-6 in acetonitrile for subsequent synthesis of labelled organic compounds. The reaction sequence /sup 6/Li(n,t) /sup 4/He - /sup 16/O(t,n) /sup 18/F produced yields of approximately 250 mCi of /sup 18/F per hour per gram of 96% enriched /sup 6/Li, as /sup 6/LiOH x H/sub 2/O target, in a reactor thermal-neutron flux of 3 x 10/sup 13/ n cm/sup -2/sec/sup -1/. Yields of tritium-free carrier-free /sup 18/F dissolved in the crown ether solution typically reach 85 +- 5% within the 45 minutes required for the radiochemical procedure.

• Research Organization: Georgia Inst. of Tech., Atlanta (USA). School of Chemistry
• DOE Contract Number: AS05-76ER03346
• OSTI ID: 6335573
• Report Number(s): DOE/ER/03346-T2; ON: DE83011217
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400703 -- Radiochemistry & Nuclear Chemistry-- Radioisotope Production
550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
651822* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Radioactive Decay-- (-1987)
651823 -- Nuclear Properties & Reactions
A=150-189
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COMPUTERIZED TOMOGRAPHY
CONVERSION
COUNTING TECHNIQUES
DATA
DECAY
DIAGNOSTIC TECHNIQUES
DIRECT REACTIONS
DRUGS
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EMISSION COMPUTED TOMOGRAPHY
ENERGY LEVELS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
FLUORINE 18
FLUORINE ISOTOPES
GOLD 187
GOLD ISOTOPES
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
HYDROGEN ISOTOPES
INFORMATION
ISOTOPE PRODUCTION
ISOTOPES
LABELLED COMPOUNDS
LIGHT NUCLEI
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN ISOTOPES
PARTICLE SOURCES
PLATINUM 187
PLATINUM ISOTOPES
RADIATION SOURCES
RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
TARGETS
TOMOGRAPHY
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES