Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 67: Issue 1
Absolute intensity of the 140.5 keV gamma-ray of99Mo
Authors:
A. Simonits Central Research Institute for Physics (KFKI) P. O. Box 49 H-1525 Budapest 114 (Hungary)

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L. Moens Institute for Nuclear Sciences (INW), Rijksuniversiteit Proeftuinstraat 86 9000 Gent (Belgium)

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F. De Corte Institute for Nuclear Sciences (INW), Rijksuniversiteit Proeftuinstraat 86 9000 Gent (Belgium)

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A. De Wispelaere Institute for Nuclear Sciences (INW), Rijksuniversiteit Proeftuinstraat 86 9000 Gent (Belgium)

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J. Hoste Institute for Nuclear Sciences (INW), Rijksuniversiteit Proeftuinstraat 86 9000 Gent (Belgium)

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Pages:
61–74
Online Publication Date:
09 Jan 2007
Publication Date:
01 Mar 1981
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02516230
Restricted access

Abstract  

The induced activity of the99Mo isotope is mostly determined via the 140.5 keV γ-line, which is the strongest gamma-ray of its daughter,99mTc. Some recent literature, however, indicates a direct feeding of this energy level from the mother isotope as well. Considering the importance of this line in practice as well as the large controversy and scattering in relevant nuclear data available at present, a combined effort was made to remeasure this questionable absolute intensity. A relative method of irradiating a Mo-target with reactor neutrons and repeatedly measuring its (n,γ) induced activity relative to the 181.1 keV and 739.5 keV gamma lines of99Mo as internal references was used. The weighted average of different runs yielded γ(99Mo, 140.5 keV)=(5.07±0.37)%. As a consequence, when the 140.5 keV gamma line is used, the contribution from the99Mo mother isotope should always be taken into account, e.g. in neutron cross-section measurements and neutron activation analysis.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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