Source: Dissertation Abstracts International, Volume: 28-11, Section: B, page: 4707. / Thesis (Ph.D.)--The Florida State University, 1967.

The nuclear spectroscopy of ('96)Nb and ('94)Nb was studied using the proton pickup (t, (alpha)) reaction on isotopically enriched targets of ('97)Mo and ('95)Mo. The experiments were performed at the tandem Van de Graff facilities of Los Alamos National Laboratory. The (alpha) particles were momentum analyzed in a quadrupole-dipole-dipole-dipole magnetic spectrometer to determine excitation energies of nuclear states. The experiments were performed at several angles and the resulting angular distributions were compared to distorted wave Born approximation calculations to determine angular momentum transfer values. The 3-member of the (pi)(p1/2)('1)(nu)(d5/2)('-1) doublet in ('96)Nb has been reassigned at 876 keV. The ten members of the (pi)(p3/2)('-1)(nu)(d5/2)('-1) and (pi)(f5/2)('-1)(nu)(d5/2)('-1) multiplets in ('96)Nb were identified for the first time. Additionally, several other new states in ('96)Nb are reported. Angular momentum transfer values were determined for twenty-six states in ('94)Nb. Fifty-four states were observed in ('94)Nb up to less than three MeV in excitation energy. Four of these states are previously unreported. / Source: Dissertation Abstracts International, Volume: 46-06, Section: B, page: 1917. / Thesis (Ph.D.)--The Florida State University, 1985.

A source for producing beams of vector polarized ('6)Li nuclei has been constructed and tested. The negative ion source is based on the atomic beam technique for selectively populating hyperfine spin states in a beam of ('6)Li atoms. Metallic ('6)Li is formed into a supersonic beam by heating the separated isotope in an oven and extracting the beam through a Laval nozzle and heated collimators. The electronic states are separated in a permanently magnetized sextupole magnet and the nuclei are polarized by a radio frequency transition. The polarized beam is ionized on a hot tungsten strip and converted to a negatively charged beam in a cesium charge exchange canal. The spin axis is rotated by a Wien filter and accelerated by an electrostatic tandem accelerator to energies of up to 6 MeV/nucleon. The beam has been focussed into a new rotatable scattering chamber system where the beam polarization has been measured using a helium gas polarimeter. / The second part of this study is an analysis of polarized triton scattering from ('12)C at 9, 11, 15, and 17 MeV. Through the use of microscopic central and spin-orbit potentials, it is found that a simple spin-orbit description of the spin dependence of the interaction is insufficient to describe the data. A more detailed investigation of possible resonances and channel coupling effects is necessary in order to better understand this system at these energies. / The last part of this study is an investigation of the spin dependence of ('6)Li + ('16)O scattering at 22.8 MeV. Excitation function data for the elastic channel and the inelastic strength of the ('6)Li first excited state were measured to complement previously measured elastic cross section and analyzing power data for this system. The vector analyzing powers show a much greater sensitivity to coupled-channels and resonance effects than the cross section. It is only when the channel coupling to the projectile excitation channel is combined with a spin-orbit potential that the analyzing power data can be described. However, more analyzing power data is needed to resolve the sources of the spin dependence of this system. / Source: Dissertation Abstracts International, Volume: 48-01, Section: B, page: 0171. / Thesis (Ph.D.)--The Florida State University, 1986.

The K('+)-N interaction is calculated with a quark potential model using the resonating group method (RGM). For the central interaction 2(H/2PI)(omega) mixed symmetry components of the nucleon and 2(H/2PI)(omega) components of the kaon wave function are included in the calculation of the RGM kernels. The total isospin I = 0 s-wave phase shifts are in good agreement with the experimentally determined phase shifts. The I = 1 interaction does not exhibit enough repulsion. The K('+)*-N channel is coupled to the K('+)-N channel via quark exchange. The channel coupling gives effectively a more repulsive interaction for both I = 1 and I = 0. This is in qualitative agreement with the I = 0 phase shifts above threshold. The spin-orbit quark exchange potential is calculated and found to be much weaker than a phenomenological potential which reproduces the p-wave phase shifts. / Source: Dissertation Abstracts International, Volume: 47-06, Section: B, page: 2487. / Thesis (Ph.D.)--The Florida State University, 1986.

Heavy ion resonances in the ('12)C + ('12)C system were investigated with an optical model plus multi-level resonance (OMMR) analysis. Elastic scattering excitation function cross sections were measured for 12 angles between 17.1(DEGREES) and 90.0(DEGREES) for energies between 17.5 Mev and 21.5 Mev in 100 keV intervals (in the center of mass system). The total reaction cross section data were measured at intervals of 100 keV for energies between 17.5 and 21.5 MeV. Analysis of the elastic scattering data including cross section data measured at six angles corresponding to zeros of Legendre polynomials provided spin determinations for four resonances located at 18.2, 19.2 and 20.2 MeV. The resonances at 18.2 and 19.2 MeV were determined to have spins = 12. The two resonances located at 20.2 MeV were determined to have spins of 12 and 14. / For the OMMR analysis, four resonance terms were added to a smoothly varying background which was described by the optical model. The optical model potential which best described the elastic scattering cross section data and the total reaction cross section data had a Woods-Saxon squared real plus Woods-Saxon imaginary form. Several other common potential forms were tested but they resulted in a poorer description of the data. The background absorption for the L = 12 partial wave at 19.2 MeV, which was calculated using the parameters obtained from the elastic scattering analysis, lead to an L = 12 partial wave which was nearly fully absorbed. However, comparisons of the calculated total reaction cross section with the data indicates that the background absorption must be considerably smaller than this. / Source: Dissertation Abstracts International, Volume: 48-03, Section: B, page: 0801. / Thesis (Ph.D.)--The Florida State University, 1987.

The charge dependence (isospin symmetry breaking) of the nucleon-nucleon interaction is examined with a nonrelativistic quark model. The model is extended to include charge dependent effects arising from the up-down quark mass difference, the neutral-charged pion mass difference, and from the neutron-proton mass difference. The one-photon exchange potential is also included to the order of the inverse nucleon mass squared. / The deuteron is treated in order to acquire some idea of the values that the model parameters may assume. No signature of charge dependence is seen in this system. / The A = 3 systems are also considered. Here it is found that the kinetic energy difference of the up and down quarks due to their differing masses gives rise to a potential that depends on the isospin projection of the two nucleons. An estimate is made for the binding energy difference between the mirror A = 3 nuclei due to this potential; on the order of sixty percent of the Nolen-Schiffer anomaly can be accounted for with this effect. / For the nucleon-nucleon scattering systems, scattering lengths and effective ranges are calculated. The charge dependent pionic interaction is found responsible for the bulk of the discrepancy between the scattering length of the neutron-proton system relative to those of the (Coulomb corrected) proton-proton or neutron-neutron systems. The potential that arises from the quark kinetic energy difference gives a contribution to the proton-proton and neutron-neutron scattering length difference that is of the correct sign and magnitude in comparison to the data. / Distorted wave Born approximation (DWBA) calculations are performed to determine the neutron-proton analyzing power differences that arise from class IV isospin dependent interactions. Results are given as a function of center of mass scattering angle at several energies. The results show that certain angles and energies exist at which some contributions to the analyzing power difference vanish, leaving one dominant contribution remaining. Hence it may prove possible to isolate this contribution and gain some insight into the nucleon-nucleon interaction from a particular class IV effect. / Source: Dissertation Abstracts International, Volume: 49-03, Section: B, page: 0803. / Major Professor: Donald Robson. / Thesis (Ph.D.)--The Florida State University, 1987.

New states in the positive parity yrast bands of $\sp{74}$Se and $\sp{77}$Kr have been observed with the reactions $\sp{52}$Cr($\sp{28}$Si,$\alpha$2p)$\sp{74}$Se and $\sp{52}$Cr($\sp{28}$Si,2pn)$\sp{77}$Kr at 98 MeV. The target consisted of approximately 1 mg/cm$\sp2$ natural chromium (84% $\sp{52}$Cr abundance) evaporated on a thick lead backing. / The new states extend the known level scheme of $\sp{74}$Se up to I$\sp{\pi}$ = (22$\sp+$) and most of the transitions in the other previously reported bands have been seen. For the states I$\sp{\pi}$ $\geq$ 6$\sp+$ the spectrum shows a relatively constant moment of inertia parameter $(\hbar\sp2$/2$\Theta)$ = 27.8 $\pm$ 0.5 keV. / Excited positive parity states up to spin (41/2) have been observed in $\sp{77}$Kr. $\Delta$I = 1 transitions have been identified throughout the positive parity band. The energies, mixing ratios and B(M1) transition rates for these transitions alternate in size as the spin increases. A cranked shell model analysis was performed along with Strutinsky-Bogolyubov cranking calculations. The observed decrease in the signature splitting of the $\nu$g$\sb{9/2}$ band has been attributed to a band crossing due to an aligning pair of g$\sb{9/2}$ protons. Prolate quadrupole deformations of $\beta\sb2$ = 0.34 for the ground band and $\beta\sb2$ = 0.26 for the first excited band are predicted. This band crossing is associated with a shape change caused by the polarization effect of aligned quasiparticles. / Source: Dissertation Abstracts International, Volume: 49-03, Section: B, page: 0803. / Major Professor: Samuel L. Tabor. / Thesis (Ph.D.)--The Florida State University, 1987.

In the Standard Model, meson properties are ultimately features of the theory of quantum chromodynamics (QCD), and exact solutions of QCD would yield, in principle, all properties of mesons (and hadrons, in general). However, at this time, an exact solution does not exist, forcing one to turn to the use of models to describe mesonic properties. Such models are not QCD but incorporate properties of QCD in an attempt to describe hadrons in a unified framework. Furthermore, since mesons are strongly-interacting relativistic systems, one prefers to work within a formalism which is both relativistic and covariant. In this work, a study of mesons is carried out using one such model--the instantaneous Bethe-Salpeter formalism. Initially, mesonic spectra are examined with the model; however, one generally wishes to describe dynamic properties of mesons, such as transitions, form factors, response functions, etc. To this end, a covariant extension of the instantaneous condition is introduced and used to develop a covariant means of calculating dynamical properties, with the instantaneous Bethe-Salpeter solutions as its support. The formalism is illustrated for a calculation of the electromagnetic form factor of the pion. / Source: Dissertation Abstracts International, Volume: 56-03, Section: B, page: 1498. / Major Professor: Jorge Piekarewicz. / Thesis (Ph.D.)--The Florida State University, 1995.

Source: Dissertation Abstracts International, Volume: 28-12, Section: B, page: 5162. / Thesis (Ph.D.)--The Florida State University, 1967.

Source: Dissertation Abstracts International, Volume: 28-12, Section: B, page: 5160. / Thesis (Ph.D.)--The Florida State University, 1967.