R-matrix evaluation · AZURE2
21Na R-matrix evaluation
Reactions fitted
- 20Ne(p,γ)21Na
- 20Ne(p,p)20Ne
E. Masha et al., Phys. Rev. C 108, L052801 (2023) · doi:10.1103/PhysRevC.108.L052801 · R-matrix analysis: J. Skowronski · About this evaluation
A proton and a neon-20 nucleus can merge for an instant into sodium-21 (20Ne(p,γ)21Na), which then sheds its extra energy as a γ-ray. The level scheme shows the energies at which sodium-21 can exist (excited states, each with its spin-parity Jπ); in the plot the dots are measurements and the line is the R-matrix model, here as an S-factor. Open Plot & data, drag a slider and see whether the line still passes through the dots: the lower the χ², the better the fit.
What am I looking at?
A proton and a neon-20 nucleus can merge for an instant into sodium-21 (20Ne(p,γ)21Na), which then sheds its extra energy as a γ-ray. The level scheme shows the energies at which sodium-21 can exist (excited states, each with its spin-parity Jπ); in the plot the dots are measurements and the line is the R-matrix model, here as an S-factor. Open Plot & data, drag a slider and see whether the line still passes through the dots: the lower the χ², the better the fit.
E. Masha et al., Phys. Rev. C 108, L052801 (2023) · doi:10.1103/PhysRevC.108.L052801 · R-matrix analysis: J. Skowronski · About this evaluation
Starting the calculation for ²¹Na…
About this evaluation
What was fitted
13 data segments from 10 data files: 7 differential cross sections, 6 angle-integrated cross sections. The Plot & data tab overlays the model on the measurements, lets you move any free level, and lists every segment with its normalization and χ2 in its table.
How to cite
Please cite the paper this evaluation belongs to:
- E. Masha et al., “First measurement of the low-energy direct capture in 20Ne(p,γ)21Na and improved energy and strength of the Ec.m. = 368 keV resonance”, Phys. Rev. C 108, L052801 (2023), doi:10.1103/PhysRevC.108.L052801.
- R. E. Azuma et al., “AZURE: An R-matrix code for nuclear astrophysics”, Phys. Rev. C 81, 045805 (2010), doi:10.1103/PhysRevC.81.045805.
- E. Uberseder and R. J. deBoer, AZURE2 User Manual, version 1.0 (2015).
- J. Skowronski, 21Na R-matrix evaluation, https://jskowron.eu/evaluations/21Na.
Cite the paper for the evaluation, AZURE2 for the code, and this page (with its version) if you use the interactive calculation or its numbers. The measured data belong to their authors: cite the original papers listed in the table of the Plot & data tab.
This page and the model file are shared under CC BY 4.0. creativecommons.org/licenses/by/4.0/
- Paper
- E. Masha et al., Phys. Rev. C 108, L052801 (2023)doi:10.1103/PhysRevC.108.L052801
- R-matrix analysis
- J. Skowronski
- Energies
- Centre-of-mass energies Ec.m. in MeV throughout; AZURE2 converts the laboratory beam energies of the data files. Level energies are excitation energies of the compound nucleus.
- Engine
- AZURE2, commit bc3bd57