β-Decay Data Explorer

Large-scale calculations of β-decay rates and implications for r-process nucleosynthesis

Ravlić, Saito, and Nazarewicz (2025)

Welcome to the β-Decay Data Explorer

This interactive platform provides access to comprehensive β-decay datasets computed with axially deformed RHB + pnQRPA using the DD-PC1 and DD-PCX interactions.

~4,900
Nuclei Calculated
2
Nuclear Interactions
105
Strength Functions

�️ Nuclear Chart

Explore the global landscape of calculated nuclei with interactive nuclear chart visualization. Color-coded by properties with chain selections.

�📊 β-Decay Tables

Explore comprehensive datasets including binding energies, deformation parameters, Q-values, half-lives, and first-forbidden contributions.

📈 Strength Functions

Visualize Gamow-Teller and first-forbidden charge-exchange strength functions for selected nuclei with K=0 and K=1 decomposition.

🔬 Methodology

Learn about the theoretical framework: axially-deformed RHB + linear response QRPA calculations using DD-PC1 and DD-PCX interactions.

Interactive Nuclear Chart

💡 Scroll to zoom • Hold Shift + Drag to pan • Click a nucleus for details

Interactive Nuclear Chart Guide

🖱️ Click a nucleus

View detailed properties and select isotopic, isotonic, or isobaric chains

🎨 Color coding

Change the property displayed via color scale using the dropdown menu

🔍 Zoom & Pan

Scroll wheel to zoom, click and drag to pan. Reset button returns to full view

✨ Magic numbers

Z/N = 2, 8, 20, 28, 50, 82, 126 highlighted when selected

β-Decay Data Explorer

Strength Function Explorer

About Strength Functions

Gamow-Teller (GT): Charge-exchange transitions with ΔJ=0,1 (excluding 0→0)

First-Forbidden (FF): Spin-dipole operators with 1⁻ transitions

Total Strength: Stot(E) = SK=0(E) + 2 SK=1(E)

Data available for 105 selected nuclei used for contour integration validation.

About This Project

Overview

This repository aggregates β-decay datasets and r-process simulation outputs supporting the manuscript:

Large-scale calculations of β-decay rates and implications for r-process nucleosynthesis
A. Ravlić, Y. Saito, and W. Nazarewicz (in preparation, 2025)

Methodology

Theoretical Framework

  • RHB + pnQRPA: Relativistic Hartree-Bogoliubov theory combined with proton-neutron Quasi-Random Phase Approximation
  • Axial Deformation: Calculations include axially-deformed nuclear shapes
  • Interactions: DD-PC1 and DD-PCX density-dependent point-coupling interactions

Calculated Properties

  • Binding energies for minimum-energy configurations
  • Mass quadrupole deformation parameter β₂
  • β⁻ decay Q-values
  • Total half-lives (including GT and FF contributions)
  • First-forbidden contribution percentages
  • Strength function distributions (selected nuclei)

Data Format

Beta-Decay Tables

Column Description Units
N Neutron number integer
Z Proton number integer
E(β) Binding energy at minimum-energy configuration MeV
β₂ Mass quadrupole deformation parameter dimensionless
Q β⁻ Q-value: 0.782 + B(Z,N) − B(Z+1,N−1) MeV
HL_log10 log₁₀ of total half-life log₁₀(seconds)
FF_percent First-forbidden contribution to total decay rate %

Contact

Ante Ravlić

Michigan State University / FRIB
University of Zagreb
[email protected]

Yukiya Saito

Michigan State University / FRIB
University of Tennessee / University of Notre Dame
[email protected]

Repository

This project is hosted on GitHub. For the complete dataset, code, and more information, visit:

View on GitHub