Publication Date

1974

Document Type

Dissertation/Thesis

First Advisor

Bushnell, David L.

Degree Name

M.S. (Master of Science)

Department

Department of Physics

LCSH

Neutrons--Capture||Hafnium--Isotopes

Abstract

A low energy (0-3 MeV) thermal-neutron-capture y-ray spectrum from the 177Hf(n,y)J78Hf reaction was obtained using an annihilation-pair spectrometer located at the Argonne in pile CP-5 reactor facility. Energies and intensities of gamma-ray transitions within the excited 178Hf nucleus have been determined. The detection system consisted of a Ge(Li) detector placed in the center of a large annular NaI(Tl) scintillator which is divided into four optically-independent quadrants. Anti-coincidence between the Ge(Li) detector and any one or more quadrants of the NaI(Tl) scintillator produced a spectrum of full energy peaks exhibiting a resolution of 3.1 KeV in the range of 1 MeV to 2 MeV. The present work when coupled with data from average-resonance-neutron-capture in I77Hf suggests a level scheme of 36 levels.

Comments

Includes bibliographical references (pages 36-37)

Extent

37 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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