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Adams, Harold J.; Fox, J. D.; Heydenburg, N. P.; Temmer, G. M.

doi:10.1103/physrev.124.1899

Cited by 25 publications

(4 citation statements)

References 6 publications

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“…As the experiment reported here did not have the same bombardment energies and target techniques as Oohen's, a similar activation experiment to his is now in progress in this laboratory. A confirmation of the discrepancy is also given by the inelastic scattering experiment of the Florida group, Adams et al (1962), who noted the absence of gamma rays higher in energy than the 4.43 MeV ray being investigated. However, their limits of detection are an order of magnitude higher than the present ones.…”

supporting

confidence: 48%

“…No evidence for the presence of either '(0 or '(1 was found and as the detector efficiency is approximately known at these energies (Nordhagen 1961) a limit was placed on the differential cross sections, a(p,yo) and a(p''(l)' by a simple comparison with the known differential cross section, a(p,p') for inelastic scattering (McKenna and Shute 1961;Adams et al 1962). These limits are shown in Table 1.…”

mentioning

confidence: 99%

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Proton?Capture Gamma Rays from Nitrogen?13

Parker¹,

Shute²

1962

Aust. J. Phys.

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From a recent experiment in this laboratory (Shute et al. 1962) on the elastic scattering of protons from 12C, resonance levels (E13N, J1t) of 13N were obtained at the laboratory bombarding energies (Ep) shown in Table 1. To confirm these results, an investigation of the yield and angular distribution of gamma rays from the reaction 12C(p'YO)13N and 12C(p'Yl)13N was undertaken. Accordingly, the theoretical angular distributions, W(8), for the gamma ray (Yo) to the ground state of 13Na-) and also for the gamma ray (Yl) to the 1st excited state of 13Na+) were evaluated on the assumptions that overlap of levels in 13N is small and lowest order multipoles are involved. As angular distributions are parity insensitive, these were found to be identical for the two gamma rays expected. The simpler of these angular distributions are also shown on the table. The expected angular distributions indicate that 90° is a suitable angle for yield curves.

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supporting

confidence: 48%

mentioning

confidence: 99%

Proton?Capture Gamma Rays from Nitrogen?13

Parker¹,

Shute²

1962

Aust. J. Phys.

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“…The energy of protons striking the samples was 7.0 f 0.1 MeV. This bombardment energy is above the threshold for inelastic scattering to the first excited state of carbon, nitrogen, and sulfur and is at a nonresonant portion of the excitation functions (13) to the first excited state of carbon (14). On passing through the filter, the beam loses 0.38 MeV which drops the beam energy below the effective threshold for inelastic scattering to the 3-state in l60.…”

Section: Methodsmentioning

confidence: 94%

Proton induced .gamma.-ray analysis of atmospheric aerosols for carbon, nitrogen, and sulfur composition

Macias¹,

Radcliffe²,

Lewis³

et al. 1978

Anal. Chem.

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A technique for the simultaneous quantitative determination of carbon, nitrogen, and sulfur using in-beam y-ray spectrometry has been developed for use with atmospheric aerosol samples. Samples are collected on quartz filters, and the aerosol composltlon is determined by analyzing the y rays emitted following the inelastic scattering of 7.0-MeV protons.Samples are nondestructively irradiated for 1000 s in a helium atmosphere, are not subjected to reduced pressures, and can be used for subsequent analysis. Detection limits for atmospheric samples are in the pg/cm* range with a precision of 5 % . The technique is compared with several more conventional methods of analysis.

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“…There is some evidence (Mitchell, personal communication 1961;Adams et al 1961) for a level at ELAB = 10·75 and also for one or more levels above 11 MeV.…”

Section: Non-resonant Analysismentioning

confidence: 99%

Analysis of Overlapping Resonances in Proton?Carbon Scattering

Robson¹,

Toutenhoofd²

1963

Aust. J. Phys.

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SummaryThe R-matrix theory of nuclear reactions is discussed for the situation where distant levels must be included and is successfully applied to the elastic scattering of protons by l2C in the energy range ELAB = 10-11· 5 MeV, where the resonance levels are overlapping. Definite spin and parity assignments are made for three levels in this region by comparing the predicted excitation functions at several angles of scattering with experiment. Previously unexplained polarization data are explained by this analysis. The optical.model potential is found to be parity dependent for ELAB

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Angular Distributions of 4.43-Mev Gamma Radiation fromC12(p, p′γ)

Cited by 25 publications

References 6 publications

Proton?Capture Gamma Rays from Nitrogen?13

Proton?Capture Gamma Rays from Nitrogen?13

Proton induced .gamma.-ray analysis of atmospheric aerosols for carbon, nitrogen, and sulfur composition

Analysis of Overlapping Resonances in Proton?Carbon Scattering

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