Browsing by Author "Bonner, T. W."
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Item A helium proportional counter for low energy neutron detection(1955) Slattery, Jack; Bonner, T. W.Item A NaI(T1) detector for the study of radiative capture processes(1953) Marion, Jerry Bascervil; Bonner, T. W.Item A neutron detector and lithium cross section measurements(1954) McCrary, James Harvey; Bonner, T. W.Item A study of scintillation properties of some organic crystals(1952) Taylor, Herbert Lyndon; Bonner, T. W.Item A study of the gamma-radiation from the reactions A1_ß + _ and Th___ + p(1958) Harlow, Marvin Vernon; Bonner, T. W.It is of considerable interest to the experimental nuclear spectroscopist to know accurately the description of energy levels in nuclei. Also of considerable interest is the nature of the radiations or particles emitted when an excited nucleus decays from an excited state to its ground state. This interest in the level structure of nuclei arises from the fact that level structure and modes of radioactive decay both serve as experimental verification for the theories describing nuclear matter. At the present time the experimental determination of the levels and decay schemes of all nuclei is far from complete. With the hope of adding to the existing knowledge of the levels and decay schemes of nuclei, a study of the low energy gamma-radiation emitted frost the low-lying states of Si30, P30 and Th232 made. The results of this investigation are reported and discussed in this thesis.Item A study of the O__(He_,n)Ne__ reaction near threshold(1961) Bearse, Robert C; Bonner, T. W.Item A test of magnetic lens pair spectrometer equipped with scintillation counters using the nuclear pairs from the reaction F__(p,[alpha])*O__(1952) Bent, Robert Demo; Bonner, T. W.Item The angular distribution of high energy neutrons scattered by helium(1953) Brugger, Robert Melvin; Bonner, T. W.Item Cross section for the reaction T_(d,n)He_(1951) Smith, James Richard; Bonner, T. W.Item Disintegration of oxygen by fast neutrons(1960) Worley, Doak Matthews; Bonner, T. W.Item Excitation curve for the reaction N__(d,n[pi])O__(1957) Rabson, Thomas Avelyn; Bonner, T. W.A magnetic leas pair spectrometer was used to study the nuclear pairs emitted by 016 when left in the excited state toy the reaction N15(d,n pi)O16. The deuteron beam for this reaction was obtained from the Rice Institute 6 mev Van de Graaff accelerator. The 6.05 Mev nuclear pair line from 016 was investigated. The spectrometer magnet current was then adjusted to the peak of this curve, and an excitation curve was run for deuteron energies from 2.2 Mev to 4.7 Mev. The 6.05 lev state of O16 which is the first excited state, is a 0+ state as is the ground state. Since gamma ray transitions are forbidden the nucleus decays to the ground state toy emitting nuclear pairs.Item Extension of the energy range of an intermediate image magnetic lens pair spectrometer(1956) Ranken, William A; Bonner, T. W.Item Fast neutrons around a 24 mev betatron(1957) Ewing, Ronald Ira; Bonner, T. W.Item The formation of hydrogen peroxide in water under alpha particle irradiation(1955) Storey, William Henry; Bonner, T. W.Item Gamma radiations from excited states of N__(1960) Givens, Wyatt Wendell; Bonner, T. W.Item Inelastic neutron scattering from silicon(1957) Tabony, Robert Henry; Bonner, T. W.In order to have a better understanding of the atomic nucleus, a variety of nuclear reactions should be studied. One particular type of nuclear reaction is the inelastic neutron scattering from an element, that is, the observation of neutrons scattered from an element which have less energy leaving than when entering the scattering element, the rest of the energy having caused nuclei to be in some excited state. If the excited states in a nucleus are not too near each other, then one can observe the inelastic neutron cross section over a given incident neutron energy range indirectly by observing the gamma rays produced at energies corresponding to these states; this is both easier and much more accurate than the direct observation of the inelastically scattered neutrons. Silicon is a very satisfactory element for this type of investigation, since the lowest energy level in Si28 is 1.78 Mev, while the next level is about 4.54 Mev. Natural silicon is 92.2% Si28, 4.7% Si29, and 3.1% Si30. Hence the effect of the Si and Si is small. In this experiment, the relative inelastic neutron cross section was observed over an incident neutron energy range of 1.6 to 4.5 MeV by counting the gamma rays from the lowest Si28 level. At certain higher energies, the twenty channels were set so as to observe any peaks produced by gamma rays from levels above 1.78 Mev.Item Investigation of the C__(p,n)N__ reaction(1960) Hanna, Jeff; Bonner, T. W.The neutron yield from the C14(p,n)N14 reaction was first investigated by Shoup, Jennings, and Sun1°2 in 1948. A number of studios of this reaction have subsequently been conducted at bombarding energies up to 3.4 Mov.3-9 In this work, an energy-sensitive neutron counter was used to detect the neutrons from the reaction at 00 for proton energies from 2.8 to 5.3 Mev. Thresholds for the emission of neutrons from the compound nucleus N15 to the first and second excited states of N14 were measured at proton energies of 3.142 Nov and 4.894 Mev, respectively. The excitation curve for neutrons of all energies at 0° was run from 2.8 Rev to 4.89 Mev. In addtion, the excitation curves for the ground state and the first excited state groups of neutrons were resolved over the same region. The resonances occuring in the reaction were used to study the energy levels of the compound nucleus N15 in the region from 12.8 to 15.2 Mev. Resonances were observed which correspond to previously unreported N15 levels in N15 at 13.52 Nov and 14.49 Mev.Item Low energy neutrons for the reaction Be_(_,n)C__(1960) St. Romain, Franklin A; Bonner, T. W.Item Measurement of the energies of neutrons from the reaction Al__ß(d,n)Si__(1955) Chapman, Richard Alexander; Bonner, T. W.Item Neutron inelastic scattering in carbon(1955) Hall, Hugh Edward; Bonner, T. W.