Production of Nuclear Isomers from Stable Nuclides with Bremsstrahlung
Journal Article
·
· Japanese Journal of Applied Physics
For the application of photoexcitation process to activation analysis, a fundamental experiment was carried out. A number of stable elements were irradiated with bremsstrahlung from a 6-Mev linear electron accelerator. It was confirmed that the following isomers were directly produced from the stable nuclides with photons: Se-77m, Br-79m, Sr-87m, Y-89m, Rh-103m, Ag-107 + Ag-109m, Cd-111m, In-115m, Sn-117m, Ba-137m, Er-167m, Hf-179m, W-183m, Ir-191m, Pt-195m, Au-197m, and Hg-199m. Both In-113m and Ba-135m were not reliable and any isomers of even-even nuclides could not be observed in thls experiment. In order to facilitate the measurement in practical use, especially for the isomers with half- life as short as several seconds, an automatic apparatus was designed and constructed. After a sample to be tested is transferred by an pneumatic conveyer to the irradiating position, the half life and the transition energies can be automatically measured with an appreciable accuracy. Details of the apparatus are described. Half lives of some shortlived isomers in question could be measured with the accuracy of 1--2% by using this apparatus with the overlap counting technique.
- Research Organization:
- Government Industrial Research Inst., Nagoya, Japan
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-034910
- OSTI ID:
- 4675250
- Journal Information:
- Japanese Journal of Applied Physics, Journal Name: Japanese Journal of Applied Physics Journal Issue: 7 Vol. 2; ISSN 0021-4922
- Publisher:
- Japan Society of Applied Physics
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ACTIVATION ANALYSIS
BARIUM 135
BARIUM 137
BREMSSTRAHLUNG
BROMINE 79
CADMIUM 111
COUNTERS
EFFICIENCY
ELECTRONS
ELEMENTS
ENERGY RANGE
ERBIUM 167
EXCITATION
GOLD 197
HAFNIUM 179
HALF-LIFE
INDIUM 113
INDIUM 115
IRIDIUM 191
IRRADIATION
ISOMERS
ISOTOPES
LABORATORY EQUIPMENT
LINEAR ACCELERATORS
MEASURED VALUES
MERCURY 199
MEV RANGE
PHOTOPRODUCTION
PHYSICS
PLANNING
PLATINUM 195
RHODIUM 103
SELENIUM 77
SILVER 107
SILVER 109
STABILITY
STRONTIUM 87
TIN 117
TRANSIENTS
TUNGSTEN 183
YTTRIUM 89
BARIUM 135
BARIUM 137
BREMSSTRAHLUNG
BROMINE 79
CADMIUM 111
COUNTERS
EFFICIENCY
ELECTRONS
ELEMENTS
ENERGY RANGE
ERBIUM 167
EXCITATION
GOLD 197
HAFNIUM 179
HALF-LIFE
INDIUM 113
INDIUM 115
IRIDIUM 191
IRRADIATION
ISOMERS
ISOTOPES
LABORATORY EQUIPMENT
LINEAR ACCELERATORS
MEASURED VALUES
MERCURY 199
MEV RANGE
PHOTOPRODUCTION
PHYSICS
PLANNING
PLATINUM 195
RHODIUM 103
SELENIUM 77
SILVER 107
SILVER 109
STABILITY
STRONTIUM 87
TIN 117
TRANSIENTS
TUNGSTEN 183
YTTRIUM 89