Radiation Explorer Physics Lab
Ionizing Radiation (α, β⁻, β⁺, γ, n⁰) & Matter Interactions
☢️ 1. Radiation Source
²⁴¹Am (5.5 MeV)
Initial Particle Energy (E0) 5.5 MeV
Source Emission Rate Medium (35/s)
Magnetic Field B⊥ (Lorentz) 0.0 T (Off)
🛡️ 2. Absorber Shield Stack

🎯 Click any interaction flash to inspect · Drag inside a slab to resize
Detector: 0.0 cps
α (He2+) β⁻ / Recoil e⁻ β⁺ (e⁺) γ / X-ray / 511 keV Neutron n⁰ Recoil Proton p⁺
Transmission (I / I0)
0.0%
Fraction reaching detector
Mean Energy Loss (LET)
120 keV/μm
Linear Energy Transfer
Characteristic Depth
R ≈ 0.04 mm
Bragg Range / HVL in Layer 1
Secondary Hazard
None
Bremsstrahlung / 511 keV / γ
📈 3. Real-Time Depth Profile Across Absorber Stack
🔍 4. Quantum Interaction Inspector
Live Physics

Dense Coulomb Ionization & Bragg Peak

Heavy α particles (+2e, 4 u) plow straight through atomic electron clouds, ripping electrons off thousands of atoms per millimeter. Because stopping power scales as 1/v², energy deposition spikes dramatically right before the particle stops (the Bragg Peak).

-dE/dx ∝ (z² · Z · ρ) / (A · v²) [Bethe-Bloch Stopping Formula]
⚡ Observed Microscopic Events (Live Tally)
📚 5. Radiation Shielding Matrix
Type Charge / Mass Dominant Mechanism Best Shield
α +2e, 4 u Dense Ionization, Bragg Peak Paper (0.1 mm), Skin
β⁻ −1e, me Multiple Scatter, Bremsstrahlung in high-Z Plastic / Acrylic, then Al
β⁺ +1e, me Scatter + e⁺e⁻ → 2γ511 keV Plastic + thick Pb for γ
γ 0, 0 Photoelectric, Compton, Pair Prod. High-Z dense Lead (Pb)
n⁰ 0, 1 u Elastic Proton Knock-on, (n,γ) Water (H2O), Polyethylene