Search results for "Promethium"

showing 2 items of 2 documents

Decay of the heaviest isotope of neodymium:154Nd

1985

The neutron-rich isotope154Nd has been separated from235U fission products with the HELIum-jet On-line mass Separator HELIOS and investigated by γ-singles, γγ- and γX-coincidence measurements. The Z- and A-assignment have been confirmed by the observation of promethium KX-rays and by the genetic relationship to the daughter product 1.7-min154Pm. A half-life of 26±2 s has been obtained for154Nd, and a partial decay scheme is proposed. A 40 s activity previously assigned to154Nd could not be confirmed.

Nuclear physicsPhysicsNuclear and High Energy PhysicsFission productsCluster decayDecay schemechemistryIsotopeNuclear fusionchemistry.chemical_elementNeodymiumPromethiumZeitschrift f�r Physik A Atoms and Nuclei
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Decay of the 4.2-min152Pm into levels of152Sm

1975

After bombardments of enriched152Sm with 14-MeV neutrons, three isomers of125Pm reaction, have been observed with half-lives of 4.2±0.2 min, 7.5±0.2 min and 15.0±1.0 min. Sources of pure 4.2-min152Pm were obtained by separating the promethium from its parent 11-min152Nd produced by thermal-neutron induced fission of235U. The beta and gamma radiations of the 4.2-min152Pm have been investigated using semiconductor and scintillation spectrometers. Most of theγ-ray transitions could be placed in a level scheme for 152Sm. Especially interesting is a level at 1083 keV for which the assignmentI π=0+ is proposed. In a 4πβγ experiment, the ground state feeding of152Sm in theβ −-decay of the 4.2-min1…

PhysicsNuclear and High Energy PhysicsScintillationSpectrometerbusiness.industryFissionAnalytical chemistrychemistry.chemical_elementPromethiumSemiconductorchemistryNuclear fusionNeutronAtomic physicsbusinessGround stateZeitschrift f�r Physik A Atoms and Nuclei
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