AN ISOMERIC STATE OF Nd$sup 13$$sup 9$

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · Izvestiya Akademii Nauk, Seriya Fizicheskaya (U.S.S.R.) For English translation see Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.)

OSTI ID:4135704

Gromov, K Ya; Danagulyan, A S; Strigachev, A T; Shpinel, V S

A tantalum target was irradiated with 600-Mev protons on a cyclotron, and a Nd fraction was isolated 4 to 5 hours after thc irradiation. The conversion electron spectrum was taken over an energy region of 15 to 900 kev on a magnetic spectrograph having a resolution of 0.08%. All the conversion electron lines were ascribed to the decay o Nd/sup 139/ (T/sub 1/2/ = 5.5 hrs). On comparing the experimental value with the theoretical values for the difference in energy of the conversion electrons for the 232.5-kev transition, it was established that all the transitions except the 232.5-kev transition occur in the Pr nucleus. It was found that the 232.5-kev transition is of the M4 type. Thus, the existence of an isomeric state of Nd/sup 139*/ with an energy of 232.5 kev can be considered as established. Similar isomeric states exist in the four neighboring isotopes of Te/sup 131/*/, Xe/sup 133*/, f the conversion electrons from the 232.5- and 113.8-kev gamma transitions, it is estimated that only 18% or less of the transitions take place through the isomeric state of Nd/sup 139*/ to the ground state, and most of the disintegrations take place by BETA conversion to excited levels in Pr/sup 139/. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-007725
• OSTI ID: 4135704
• 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: 27; ISSN IANFA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

BARIUM 135
BETA PARTICLES
CERIUM 137
CYCLOTRONS
DECAY
ELECTRONS
ENERGY LEVELS
ENERGY RANGE
GAMMA RADIATION
HALF-LIFE
INTERNAL CONVERSION
IRRADIATION
ISOMERS
MAGNETIC FIELDS
MEV RANGE
NEODYMIUM 139
PHYSICS
PRASEODYMIUM
PROTON BEAMS
RESOLUTION
SPECTRA
SPECTROMETERS
TANTALUM
TARGETS
TELLURIUM 131
XENON 133