English Posts

Abstract: In this article, we present the design of a DIY apparatus for the coincidence detection of alpha and gamma emissions produced by the decay of the Americium-241 isotope. We aim to acquire the pulses and measure the time interval between them, with the goal of precisely measuring the decay …

Abstract: in this article, we present the design of a fluorimeter based on a SiPM photomultiplier. The excitation pulses are produced by an LED driven by a pulser that generates very short current pulses. The signal produced by the SiPM is amplified and acquired using a multichannel analyzer. The signal spectrum corresponds to the intensity of the fluorescence pulse, which, in turn, is proportional to the fluorophore concentration. The high sensitivity of the SiPM allows for precise measurements even at very low fluorophore concentrations.

Abstract: in this article, we present the design of a fluorimeter based on a SiPM photomultiplier. The excitation pulses are produced by an LED driven by a pulser that generates very short current pulses. The signal produced by the SiPM is amplified and acquired using a multichannel analyzer. The signal spectrum corresponds to the intensity of the fluorescence pulse, which, in turn, is proportional to the fluorophore concentration. The high sensitivity of the SiPM allows for precise measurements even at very low fluorophore concentrations.

Abstract: In this article, we present some results obtained with our horn antenna for receiving the 21-cm emission of neutral hydrogen. The goal is to map our galaxy as much as possible to highlight the spiral structure of the Milky Way. This is a long-term project; this post will be updated as new results become available.

Abstract: This article presents some results obtained using the alpha spectrometer described in the previous post. We acquired the spectra of some alpha radiation-emitting sources. The preparation of an alpha source suitable for

Abstract: in this article, we present the improved version of the alpha spectrometer described in the post DIY Alpha Spectrometer. The apparatus described here has enhanced the front-end electronics and signal acquisition. Specifically, a low-noise shaping amplifier with a shaping time of 1 μs has been adopted. Additionally, the electronic assembly and shielding have been improved, reducing noise and enhancing energy resolution. The signals were acquired using the Red Pitaya board, which, with a sample rate of 125 Ms/s, easily allows for the acquisition of signals with a duration on the order of a microsecond.

Abstract: In this article, we present the design of a cosmic ray detector built around a plastic scintillator coupled with a photomultiplier. The pulses generated by cosmic ray interactions are captured using the Red Pitaya microcomputer. Thanks to its high sampling rate and the capability for software-based pulse processing, the Red Pitaya enables precise measurement of the decay time of muons that come to rest within the scintillator.

Abstract: in this article, we present the design of a cosmic ray detector based on a plastic scintillator and photomultiplier. The pulses produced by the interaction of cosmic rays are acquired using the Red Pitaya microcomputer. The Red Pitaya's high sampling rate and the possibility of subsequent software processing of the acquired pulses make it possible to measure the decay time of the muons that come to rest inside the scintillator.

Abstract: in this article, we continue the presentation of the new KC761B device. In previous posts, we described the device in general terms and its functionality as a gamma spectrometer. In this post, we describe its use as a beta and alpha radiation detector. To detect beta and alpha particles, the device uses a PIN-type semiconductor sensor positioned on the back of the device.

Abstract: in this article, we continue the presentation of the new KC761B device. In the previous post, we described the apparatus in general terms. Now we mainly focus on the gamma spectrometer functionality.

Abstract: in this article, we present an interesting new apparatus dedicated to gamma spectrometry and dosimetry measurements. It is a device based on a CsI(Tl) scintillator coupled to solid-state photomultipliers: SiPM. In addition to the scintillation sensor, the instrument has a PIN diode sensitive to beta radiation.

The PhysicsOpenLab adventure has lasted for several years now. They were beautiful years in which we carried out many projects which were all made public on the pages of this site. However, costs have become quite high and it is difficult to maintain the web space and propose new projects …

Abstract: in this article we deepen the phenomenon of crystalline polymorphism and its experimental study through the technique of Raman spectroscopy.

Abstract: in this article we describe some fluorescence quenching measures in some substances. The phenomenon of quenching occurs when some molecules absorb the energy of the fluorophores. This interesting phenomenon can be used in quantitative measurements for the determination of the quencher concentration and also, through the Stern-Volmer model, for …

Abstract: in this article we describe the construction of a simple apparatus for spectroscopic analysis of atomic light emission from electric arc. The apparatus is based on a high voltage generator that produces an electric arc whose light emission is analyzed by a fiber optic spectrometer.