Home / English Posts

English Posts

Portable Radiation Detector

The purpose of this project is to build a small portable radiation detector with the possibility of being connected to an android smartphone. There are many “apps” available on the google play store that are thought to transform the smartphone into an advanced radiation detector, but to accomplish all this you …

Read More »

X-Ray Generator

An X-ray tube is a vacuum tube that converts electrical input power into X-rays. X-ray tubes evolved from experimental Crookes tubes with which X-rays were first discovered on November 8, 1895, by the German physicist Wilhelm Conrad Röntgen. The availability of this controllable source of X-rays created the field of radiography, the imaging of partly opaque objects with penetrating radiation. In …

Read More »

Photogates with Theremino

Two “general purpose” photodiodes, two LEDs, some front-end electronics for photodiode reading, and a Theremino master are the tools to create a pair of photogates that can be used for many educational demonstrations in the field of the kinematics. There are so many solutions available on the market (hardware + …

Read More »

Photonuclear / Compton Scattering Cross Section Ratio

Theory We propose an experiment presented in the CAEN educational catalog. The purpose of the experiment is the determination of the ratio of the effective cross-sections due to Compton and Photoelectric effects as a function of photons energy. In the energy range up to 2 MeV, gamma rays interact with …

Read More »

SiPM with BGO Scintillator Crystal

From EPIC Crystal Co. we received two scintillator crystals BGO (Bismuth Germanate – Bi4Ge3O12) with cylindrical shape with 6 mm diameter and length 10 mm. With these crystals we would like to try to build a SiPM based radiation detector for beta and  gamma radiation. The BGO scintillato has been described in …

Read More »

Trans-Impedance Amplifier

From Wikipedia : In electronics, a transimpedance amplifier (TIA) is a current-to-voltage converter, most often implemented using an operational amplifier. The TIA can be used to amplify the current output of Geiger–Müller tubes, photomultiplier tubes, photo detectors and other types of sensors to a usable voltage. Current-to-voltage converters are used with sensors that have a current response that is more …

Read More »

Charge Sensitive Preamplifier

Charge Sensitive Preamplifier is an electronic device that can integrate a current signal and generate a voltage signal with an amplitude proportional to the incoming input charge. The signal produced by many detectors is of very low amplitude and therefore needs adequate amplification. If the output signal can be assimilated …

Read More »

Beta Particles Range & Absorption

β-particle is a charged particle that interacts with matter in several ways depending on its initial energy : mainly ionization process and Bremsstrahlung process. When β-radiation crosses a matter thickness, it releases completely or part of its energy due to collisions with atoms; this phenomenon depends on the initial β-energy …

Read More »

Alpha Particles Range & Bragg Curve

The energy of alpha particles varies, with higher energy alpha particles being emitted from larger nuclei, but most alpha particles have energies of between 3 and 7 MeV, corresponding to extremely long and extremely short half-lives of alpha-emitting nuclides, respectively. This energy is a substantial amount of energy for a single …

Read More »

Spectral Lines Broadening

In the Atomic Spectroscopy post, we have learned (and experimented) that the emission spectrum of a chemical element is made up of discrete lines corresponding to the electromagnetic radiation emitted by the electrons of its atoms when they “drop” from a higher energy state to one of less energy. For each transition …

Read More »