THE SPECTRA OF INTERNAL CONVERSION ELECTRONS EMITTED DURING CAPTURE OF THERMAL NEUTRONS BY Er$sup 166$ AND Er$sup 16$$sup 7$

Journal Article · Fri Nov 30 23:00:00 EST 1962 · Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.)

OSTI ID:4726503

Ivanov, V A; Pelekhov, V I

A sample enriched in Er/sup 166/, a natural isotopic mixture, and a sample enriched in Er/sup 167/ were irradiated with neutrons. Measurements of the internal conversion electrons were made on a magnetic BETA spectrometer having a resolution of 1.3% for 20 to 300 kev electrons and 0.6% for higher energy electrons up to 2 Mev. A comparison of the spectrum due to Er/sup 168/ with that of the natural isotopic mixture shows that the electron energies in the Er/sup 167/ spectrum do not exceed st run. Concent 300 kev. The conversion lines belonging to Er/sup 167/ and Er/sup 168/ were distinguished by measurements on three targets of varying isotopic composition. The relative intensities for the conversion lines in the Er/sup 168/ spectrum are tabulated. The ratio alpha /sub K// alpha /sub L/ was found to be 2.11, 3.45, and 6.4 for the 185, 285, and 816 kev transitions respectively in Er/sup 168/. The 185 and 285 kev transitions can be assigned to type E2. A scheme for the radiative transitions of the Er/sup 168/ necleus in the Er/sup 167/(n, gamma )Er/sup 168/ reaction is presented. The Er/sup 167/ spectrum showed K-, L-, and Mconversion lines for the 208 kev transition that were significantly higher than the intensities of the remaining lines in the spectrum. The ratio alpha /sub K// alpha /sub L/ = 0.69, and the ratio alpha /sub L// alpha /sub M/ = 3 450 deg C in a .7 for the 208 kev transition. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-022587
• OSTI ID: 4726503
• Journal Information: Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.), Journal Name: Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.) Vol. Vol: 26; ISSN IANFA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

BETA SPECTROMETERS
CAPTURE
ELECTRONS
ENERGY LEVELS
ENERGY RANGE
ERBIUM 166
ERBIUM 167
ERBIUM 168
GAMMA RADIATION
INTERNAL CONVERSION
IRRADIATION
MAGNETIC FIELDS
MEASURED VALUES
NEUTRONS
NUCLEAR REACTIONS
PHYSICS
SPECTRA
THERMAL NEUTRONS