A Study of the Radioactive Decay of the Two Isomers of Pd109 and of the Associated Low-Lying Levels of Ag109

Author

John W. Starner

Publication Date

6-3-1959

Abstract

The radiations of Pd¹⁰⁹ (13.45 ± 0.01 hr) and Pd^109m(4.69 ± 0.01 min) have been investigated with a coincidence scintillation spectrometer and a solenoidal beta-ray spectrometer. Pd^109m was observed to have only one mode of decay: a 188-kev (E3) isomeric transition to Pd¹⁰⁹. The principal beta-ray group (>99.9%) of Pd¹⁰⁹ was found to have an end-point energy of 1.025 ± 0.005 Mev. Gamma rays of the following energies (kev) and approximate intensities (photons/10⁵ disintegrations) were observed to acccmpany the decay of Pd¹⁰⁹: 773 (4), 707 (2), 643 (10), 602 (2), 553 (2), 448 (1), 412 (10), 325 (0.5), 307 (10), 129 ( 0. 5), 88 ( 6 x 10³ ) , and 41 ( 1). The following gamma-gamma coincidences were observed: 643-129, 602-129, 602-41, 553-307, 448-412, 412-307 kev. A level scheme is proposed for Ag¹⁰⁹ which involves energy levels at 88, 129, 307, 412, 719, 732, and 860 kev.

Degree Name

Physics

Level of Degree

Masters

Department Name

Physics & Astronomy

First Committee Member (Chair)

Darol Kenneth Froman

Second Committee Member

Jack Katzenstein

Third Committee Member

Nelson Jarmie

Fourth Committee Member

Merle E. Bunker

Language

English

Document Type

Thesis

Recommended Citation

Starner, John W.. "A Study of the Radioactive Decay of the Two Isomers of Pd109 and of the Associated Low-Lying Levels of Ag109." (1959). https://digitalrepository.unm.edu/phyc_etds/166