Nuclear ground state properties of stable and radioactive isotopes by ultraviolet laser spectroscopy
Başlık:
Nuclear ground state properties of stable and radioactive isotopes by ultraviolet laser spectroscopy
Yazar:
Campbell, Paul, author.
ISBN:
9780438082786
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (239 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 76-08C.
Özet:
The isotope shifts and hyperfine structures in ultraviolet and visible transitions in bismuth, ytterbium, zinc and zirconium have been measured using high sensitivity, frequency-extended laser spectroscopy. The extended frequencies have been obtained by intra-cavity frequency doubling of a ring dye laser using betaBaB2O4 and alphaLilO3 crystals. The A=202, 203 and 204 neutron deficient isotopes of bismuth have been studied on the 4S3/2-4P1/2 306.7nm resonance line. The spectroscopic technique applied, which was based on a cooled inert buffer gas cell, demonstrated a sensitivity comparable to the highest reported for I≠0 isotopes. The deduced behaviour of the nuclear deformation in this isotope chain has been compared with that of other isotopes in the Z~82 region and a level of systematic behaviour unlike any other studied region has been observed. Hyperfine structure and isotope shift of the 4d25s 4F3/2-4d25p4D1/2 (312.7nm) ionic transition in A=91 zirconium have been measured. An odd-even staggering in the mean square nuclear charge radius immediately beyond the N=50 shell closure is apparent. Further measurements of all even stable isotopes in this transition and in the 4d25s 4F3/2-4d25p4D3/2 (310.0nm) transition have demonstrated a changing nuclear deformation, similar to that observed in strontium and molybdenum, that is not reflected in B(E2) transition rate measurements. Two transitions in atomic zinc and three in ionic ytterbium have also been investigated and atomic structure of each system, particularly the presence of large specific mass shifts, is discussed.
Notlar:
School code: 1543
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(686842.1) | 686842-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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