The 46Ti(p, γ)47V, 50Cr(p, γ)51Mn, 58Ni(α, γ)62Zn and 58Ni(α, p)61Cu cross sections

doi:10.1016/0375-9474(74)90271-1

Nuclear Physics A

Volume 236, Issue 2, 30 December 1974, Pages 523-532

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Abstract

The $^{46} Ti (p, γ)^{47} V,^{50} Cr (p, γ)^{51} Mn,^{58} Ni (α,γ)^{62} Zn and^{58} Ni (α, p)^{61} Cu$ cross sections have been measured in the energy range of interest for stellar nucleosynthesis during oxygen and silicon burning. The results are compared with statistical theory calculations which attempt to treat excited state effects and the γ-ray channel more realistically than previous calculations.

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Cited by (11)

In memoriam Jeffrey Stewart Schweitzer 1946–2022
2023, Applied Radiation and Isotopes
Accelerated radiation damage test facility using a 5 MV tandem ion accelerator
2015, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
We have developed a new irradiation facility that allows to perform accelerated damage tests of nuclear reactor materials at temperatures up to 400 °C using the intense proton (<100 μA) and heavy ion (≈10 μA) beams produced by a 5 MV tandem ion accelerator. The dedicated beam line for radiation damage studies comprises: (1) beam diagnosis and focusing optical components, (2) a scanning and slit system that allows uniform irradiation of a sample area of 0.5–6 cm², and (3) a sample stage designed to be able to monitor in-situ the sample temperature, current deposited on the sample, and the gamma spectrum of potential radio-active nuclides produced during the sample irradiation. The beam line capabilities have been tested by irradiating a 20Cr–25Ni–Nb stabilised stainless steel with a 3 MeV proton beam to a dose level of 3 dpa. The irradiation temperature was 356 °C, with a maximum range in temperature values of ±6 °C within the first 24 h of continuous irradiation. The sample stage is connected to ground through an electrometer to measure accurately the charge deposited on the sample. The charge can be integrated in hardware during irradiation, and this methodology removes uncertainties due to fluctuations in beam current. The measured gamma spectrum allowed the identification of the main radioactive nuclides produced during the proton bombardment from the lifetimes and gamma emissions. This dedicated radiation damage beam line is hosted by the Dalton Cumbrian Facility of the University of Manchester.
Complementary optical-potential analysis of α-particle elastic scattering and induced reactions at low energies
2009, Atomic Data and Nuclear Data Tables
A previously derived semi-microscopic analysis based on the Double Folding Model, for $α$ -particle elastic scattering on $A \sim 100$ nuclei at energies below 32 MeV, is extended to medium mass $A \sim 50 – 120$ nuclei and energies from ∼13 to 50 MeV. The energy-dependent phenomenological imaginary part for this semi-microscopic optical model potential was obtained including the dispersive correction to the microscopic real potential, and used within a concurrent phenomenological analysis of the same data basis. A regional parameter set for low-energy $α$ -particles entirely based on elastic scattering data analysis was also obtained for nuclei within the above mentioned mass and energy ranges. Then, an ultimate assessment of $(α, γ)$ , $(α, n)$ , and $(α, p)$ reaction cross sections considered target nuclei from ⁴⁵Sc to ¹¹⁸Sn and incident energies below ∼12 MeV. The former diffuseness of the real part of optical potential as well as the surface imaginary potential depth have been found to be responsible for the actual difficulties in the description of these data, and modified in order to obtain an optical potential which describes equally well both the low-energy elastic scattering and induced reaction data for $α$ -particles.
Nuclear Data Sheets for A = 47
2007, Nuclear Data Sheets
Shell model based reaction rates for rp-process nuclei in the mass range A = 44-63
2001, Atomic Data and Nuclear Data Tables
We have used large-scale shell-model diagonalization calculations to determine the level spectra, proton spectroscopic factors, and electromagnetic transition probabilities for proton rich nuclei in the mass range A=44–63. Based on these results and the available experimental data, we calculated the resonances for proton capture reactions on neutron deficient nuclei in this mass range. We also calculated the direct capture processes on these nuclei in the framework of a Woods–Saxon potential model. Taking into account both resonant and direct contributions, we determined the ground-state proton capture reaction rates for these nuclei under hot hydrogen burning conditions for temperatures between 10⁸ and 10¹⁰ K. The calculated compound-nucleus level properties and the reaction rates are presented here; the rates are also available in computer-readable format from the authors.
Cross sections and thermonuclear reaction rates for 42Ca(p, γ)43Sc, 44Ca(p, γ) 45Sc, 44Ca(p, n) 44Sc and 45Sc(p, n)45Ti
1982, Nuclear Physics, Section A
The yield of γ-rays from the reaction ⁴²Ca(p, γ)⁴³Sc has been measured as a function of bombarding energy over the range 0.63–3.01 MeV, from ⁴⁴Ca(p, γ)⁴⁵Sc over the range 0.775–4.00 MeV, from ⁴²Ca(p, p'γ)⁴²Ca over the range 2.24–3.01 MeV, and from ⁴⁴Ca(p, p'γ)⁴⁴Ca over the range 1.90–5.03 MeV. The cross section of the reaction ⁴⁴Ca(p, n)⁴⁴Sc has been measured from threshold to a bombarding energy of 5.05 MeV by observation of the 1157 keV γ-ray associated with the residual ⁴⁴Sc activity, and the cross section of the reaction ⁴⁵Sc(p, n)⁴⁵Ti has been measured from threshold to a bombarding energy of 4.00 MeV both by observation of the annihilation radiation associated with the residual ⁴⁵Ti activity and by measurement of the total neutron yield with a wide-angle BF₃ tube and paraffin detector. All these data are compared with statisticalmodel calculations and satisfactory agreement is achieved. Thermonuclear reaction rates for the (p, γ) and (p, n) reactions are calculated for the temperature range 5 × 10⁸-10¹⁰K and the significance of these results for explosive nucleosynthesis in stars is discussed.

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^☆: Supported in part by the National Science Foundation (GP-28027).

^††: Present address: Users Office, meson Facility-LASL, Los Alamos, New Mexico 87544.

^†††: Present address: Schlumberger-Doll Research Center, P.O. Box 307, Ridgefield, Connecticut 06877.

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Nuclear Physics A

Abstract

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Cited by (11)

In memoriam Jeffrey Stewart Schweitzer 1946–2022

Accelerated radiation damage test facility using a 5 MV tandem ion accelerator

Complementary optical-potential analysis of α-particle elastic scattering and induced reactions at low energies

Nuclear Data Sheets for A = 47

Shell model based reaction rates for rp-process nuclei in the mass range A = 44-63

Cross sections and thermonuclear reaction rates for <sup>42</sup>Ca(p, γ)<sup>43</sup>Sc, <sup>44</sup>Ca(p, γ) <sup>45</sup>Sc, <sup>44</sup>Ca(p, n) <sup>44</sup>Sc and <sup>45</sup>Sc(p, n)<sup>45</sup>Ti

The 46Ti(p, γ)47V, 50Cr(p, γ)51Mn, 58Ni(α, γ)62Zn and 58Ni(α, p)61Cu cross sections☆

Abstract

Nucl. Phys.

Rev. Mod. Phys.

Nature

Astrophys. J.

Astrophys. J. Suppl.

Phys. Rev.

Can. J. Phys.

Astrophys. J.

The $^{46} Ti (p, γ)^{47} V,^{50} Cr (p, γ)^{51} Mn,^{58} Ni (α, γ)^{62} Zn and^{58} Ni (α, p)^{61} Cu$ cross sections☆