Publication : Prabhu, S., Jayaram, S., Bubbly, S. G. & Gudennavar, S. B. A simple software for swift computation of photon and charged particle interaction parameters: PAGEX. Applied Radiation and Isotopes 176, 109903 (2021) https://doi.org/10.1016/j.apradiso.2021.109903
Original release : October 2019
Srilakshmi Prabhu, Sreehari Jayaram, Bubbly S G* and S B Gudennavar
Department of Physics and Electronics, CHRIST (Deemed to be University), Bengaluru-560029, Karnataka, India
*Correspondence to: bubbly.sg@christuniversity.in; bubblysg@rediffmail.com
A complete package for computation of various radiation interaction parameters useful in diverse fields. The radiations considered include X-/gamma rays, electrons, protons and alpha particles.
Documentation at: https://pagex.readthedocs.io/
- An executable file for windows is available in releases to easily run the GUI (https://github.com/sriharijayaram5/PAGEX/releases/download/v1.2/pagex.exe). Alternatively, to run from the command line follow the instructions below.
- Clone the github repository https://github.com/sriharijayaram5/PAGEX.git on your local machine. Instructions to clone a github repository: https://docs.github.com/en/repositories/creating-and-managing-repositories/cloning-a-repository
- The repository can also just be donwloaded as .zip file.
- Install python3.x from https://www.python.org/downloads/.
- Run the following commands in your command prompt in the directory you wish to install a virtual python environment.
-
pip install virtualenv virtualenv my_env_name my_env_name\Scripts\activate.bat - Navigate to the PAGEX directory.
-
pip install -r requirements.txt - You can now run the PAGEX program GUI by the following command:
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python pagex_worker.py - The program can also be run from terminal by importing the
Compoundclass: -
from pagex_worker import Compound my_comp = Compound(comp='C 6 H 12 O 6') my_comp.myu() my_comp.plot_parameter() my_comp.write_to_csv() #To run gui import pagex_worker pagex_worker.run_gui() - An iPython REPL is recommended for terminal use. See docstring for help and arguments.
-
help(my_comp.myu)
Please contact me at s.jayaram@pi3.uni-stuttgart.de if any issues persist after extensive debugging.
Various parameters and their relevant atomic number and energy range computed by PAGEX are as follows:
| Description | Parameters | Atomic number range | Energy range |
|---|---|---|---|
| Partial/total cross section per atom (b/atom) (with and without coherent scattering) | σcoh, σincoh, σe, σpair, σtrip, σw/coh, σwo/coh (for elements) | 1-99 | 1 keV - 100 GeV |
| Mass attenuation coefficients (cm2/g) (with and without coherent scattering) | μ/ρcoh, μ/ρincoh, μ/ρe, μ/ρpair, μ/ρtrip, μ/ρw/coh, μ/ρwo/coh (for elements/compounds) | 1-99 | 1 keV - 100 GeV |
| Average cross section per atom (b/atom) and average cross section per electron (b/electron)a | σa and σe | 1-99 | 1 keV - 100 GeV |
| Effective atomic number (Zeff) and electron density (Neff, electrons/g) | Zeff and Neff | 1-99 | 1 keV - 100 GeV |
| Mass-energy absorption coefficients (μen/ρ, cm2/g) and relative KERMAb | μen/ρ and KR | 1-92 | 1 keV - 20 MeV |
| Photon energy absorption effective atomic number and electron density (electrons/g) | ZPEAeff, NPEAeff (electrons/g) | 1-92 | 1 keV - 20 MeV |
| Equivalent atomic number | Zeq | 1-99 | 1 keV - 100 GeV |
| G-P fitting parameters and buildup factors | a, b, c, Xk and d, EABF and EBF | Zeq ~ 4-82 | 15 keV - 15 MeV |
a - Note: 1 barn = 10-24cm2 b - Relative to air and 11 human tissues (adipose tissue, blood, bone, brain, breast, eye, muscles, ovary, testis, skin and soft tissue) as reported in ICRU Report 44 (1989)
| Description | Parameters | Atomic number range | Energy range |
|---|---|---|---|
| Mass stopping power (MeV cm2/g) | S(E)/ρ | 1-98 (electrons) 1-92 (alpha particles) 1-92 (protons) | 10 keV - 1 GeV (electrons) 1 keV - 1 GeV (alpha particles) 1 keV - 10 GeV (protons) |
| Mass stopping cross section (MeV cm2/atom) | Sc | ||
| Effective atomic number and electron density (electrons/g) | Zeff and Neff |
| File | Data |
|---|---|
| NIST/MDATX3n.xxx | Atomic cross section data for each element |
| AStar_data/DATAxxx | Stopping-power data of helium ions in each element |
| PStar_data/DATAxxx | Stopping-power data of protons in each element |
| EStar_data/DATAxxx | Stopping-power data of electrons in each element |
| XRay_data1/DATAnxx | Element photon mass attenuation coefficient (μ/ρ) and mass energy-absorption coefficient (μen/ρ) data |
| XRay_Comp1/DATAn_material | Material photon mass attenuation coefficient (μ/ρ) and mass energy-absorption coefficient (μen/ρ) data |
| ANSI_data/ANSI_(A/B)/DATAn_x | G-P fitting parameters a, b, c, d, Xk |
where 'xxx' and 'xx' represent the atomic number.
Various output parameters computed are written directly into a .csv file with parameters under a particular sub-heading being written to a .csv file in that name followed by compound constituents; (for instance, mass attenuation coefficients are written in the file named "Photon mass attenuation and interaction cross section parameters”). An input log ('InputLog.log') is maintained that logs all input made to the program with a time-stamp.
The developers of PAGEX have put in their sincere efforts to deliver a program that computes accurate data and relies on other standard databases. However, the developers make no warranties to that effect, and the developers or affiliates shall not be liable for any damage that may result from errors or omissions in the calculations or database used.
Copyright 2019 Bubbly S G Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.