Application of the schematic model to four-quasiparticle states Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/cn69m6457

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  • The Tamm-Dancoff equation of motion for four BCS quasiparticles is derived. It is solved in the limit of degenerate energy levels using a seperable interaction. The result is then applied to the coupling between collective states with two and four quasiparticles, which corresponds to a coupling between collective states with one and two phonons. A case of special interest involves the coupling of the collective two-quasiparticle state to the collective fourquasiparticle state. This interaction represents the leading-order anharmonic effect in the vibrational motion. Its effect on the energy level diagram and the strength of the crossover transition 2+2 - 0+1 are investigated for ¹⁰⁶Pd, ¹⁰⁸Pd, ¹¹⁰Pd, ⁷⁴Se, ⁷⁶Se and ⁷⁸ se.
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  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Made available in DSpace on 2013-07-02T16:19:42Z (GMT). No. of bitstreams: 1 HoringAntje1989.pdf: 464065 bytes, checksum: 4ca3884952f40cd2235ce09fdeb32f67 (MD5) Previous issue date: 1988-08-31
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