Cross sections and thermonuclear reaction rates of proton-induced reactions on 37Cl

doi:10.1016/0375-9474(85)90212-X

Nuclear Physics A

Volume 439, Issue 1, 3 June 1985, Pages 176-188

https://doi.org/10.1016/0375-9474(85)90212-X Get rights and content

Abstract

The yields of γ-rays from the reactions ³⁷Cl(p, γ)³⁸Ar and ³⁷Cl(p, αγ)³⁴S have been measured as a function of bombarding energy over the ranges 0.65–2.15 MeV and 1.25–2.15 MeV respectively, and the yield of neutrons from ³⁷Cl(p, n)³⁷Ar from threshold to 2.50 MeV. The results are compared with global statistical-model calculations and thermonuclear reaction rates are calculated for the temperature range 5 × 10⁸–10¹⁰ K. The significance of these thermonuclear reaction rates for stellar nucleosynthesis calculations is discussed.

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We have been evaluating the efficacy of polymer films for proton beam dosimetry. PE, PS, PVF, PVDF, PFA and FEP films were irradiated with 4.1 and 9.4 MeV protons at a flux of 2.5 × 10¹¹ cm⁻² s⁻¹ and a fluence of 2.5 × 10¹³ cm⁻². The perfluorinated films were relatively insensitive to the proton irradiation. The UV absorption of PS displayed significant radiation-induced red shift, but no quantifiable absorption peaks. The strongly absorbing chromophore at 225 nm of irradiated PVDF is too unstable for practical dosimetry. PE has a stable and moderately absorbing radiolytic chromophore at 235 nm, but is transparent in the visible wavelength region. Irradiated PVF absorbs strongly in both UV and visible regions, and its UV absorbance is linearly proportional to the dose over the range of 10–1000 kGy when irradiated with 4.1 MeV protons at a dose rate of 840 Gy s⁻¹. PVF shows the most potential as multipurpose dosimeter for high resolution profiling of ion beams. Pertinent applications include irradiations that require verification of lateral beam homogeneity.
The 34S(α, γ)38Ar, 34S(α, n)37Ar and 34S(α, p)37Cl cross sections
1993, Nuclear Physics, Section A
The cross sections of the reactions ³⁴S(α, γ)³⁸Ar, ³⁴S(α, n)³⁷Ar and ³⁴S(α, p)³⁷Cl have been measured over bombarding-energy ranges of 2.79–5.87 MeV, 5.26–9.88 MeV and 5.70–9.33 MeV, respectively. The data, together with those for proton-induced reactions on ³⁷Cl, have been compared with statistical-model calculations. Thermonuclear reaction rates for ³⁴S(α, γ), (α, n), (α, p) have been calculated for temperatures appropriate for stellar nucleosynthesis.
Energy levels of A = 21-44 nuclei (VII)
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The experimentally determined properties of A = 21–44 nuclides are complied and evaluated with special emphasis on nuclear spectroscopy.
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Cross sections for proton induced reactions on 41K and for the reaction 62Ni(α, p)65Cu
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^☆: Supported in part by the Australian Research Grants Scheme (B77/15413).

^∗: Present address: Department of Physics, University of Tasmania, Box 252C, GPO, Hobart, Tasmania 7001, Australia.

^∗∗: Present address: W.K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA.

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Nuclear Physics A

Abstract

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A systematic study of equilibrium and pre-equilibrium (p, n) reaction mechaisms cross-sections at intermediate energies for 25 < A < 240 Target nuclei

Cross sections and thermonuclear reaction rates of proton-induced reactions on 37Cl☆

Abstract

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Cross sections and thermonuclear reaction rates of proton-induced reactions on ³⁷Cl☆