Gamma- and beta-ray spectroscopy studies of the radioactive decay of Mn-51 to Cr-51 Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2v23vx63k

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • The decay scheme of Mn⁵¹ has been investigated using gamma-ray and beta-ray scintillation spectrometers and a fast coincidence spectrometer. A half-life value of 46.5 ± 0.2 minutes was determined for Mn⁵¹ which decays predominantly to the ground state of Cr⁵¹ by the emission of positons with an experimentally measured end-point energy of 2.21 ± 0.02 MeV. Weak branching to the 761-keV and 1170-keV levels of Cr⁵¹, however, has been inferred from the measured 761 ± 11-keV and 1170 ± 15-keV gamma-ray energies observed in the Mn⁵¹ gamma-ray spectrum. Relative intensities for these weak gamma-rays have been determined experimentally as 0.70 ± 0.10 and 0.48 ± 0.12 percent of the positons, respectively. An 11 ± 1 nsec mean-life has been obtained for the 761-keV level of Cr⁵¹ while an upper-limit of 1 nsec has been given to the 1170-keV level. Using these experimental results coupled with theory, a spin and parity assignment of [superscript 5⁻]/[subscript 2] was given to the ground state of Mn⁵¹, a spin assignment which is not in agreement with the 7-value expected from the shell model prediction.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Madison Medley (mmscannerosu@gmail.com) on 2014-04-22T20:40:54Z No. of bitstreams: 1 GlibertKennethM1966.pdf: 866496 bytes, checksum: 47ff9c1874cd82d5c6a00e7d43d7c006 (MD5)
  • description.provenance : Approved for entry into archive by Katy Davis(kdscannerosu@gmail.com) on 2014-04-23T22:50:53Z (GMT) No. of bitstreams: 1 GlibertKennethM1966.pdf: 866496 bytes, checksum: 47ff9c1874cd82d5c6a00e7d43d7c006 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2014-04-22T21:10:16Z (GMT) No. of bitstreams: 1 GlibertKennethM1966.pdf: 866496 bytes, checksum: 47ff9c1874cd82d5c6a00e7d43d7c006 (MD5)
  • description.provenance : Made available in DSpace on 2014-04-23T22:50:53Z (GMT). No. of bitstreams: 1 GlibertKennethM1966.pdf: 866496 bytes, checksum: 47ff9c1874cd82d5c6a00e7d43d7c006 (MD5) Previous issue date: 1965-11-16

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items