Experimental physics often involves detecting weak, time-varying signals embedded in noise-challenges common to both nuclear and biomedical systems. This work explores techniques for extracting and analyzing non-sinusoidal oscillations in noisy, multichannel datasets. Using time-frequency analysis and adaptive denoising methods, we address issues such as amplitude and frequency modulation,...
Pulsed slow-positron beams enable atomic-scale characterisation of surface and near-surface microdefects, furnishing precise data on defect size, concentration and spatial distribution. This study establishes a high brightness, high time resolution pulsed slow positron platform based on a solid-neon moderator that incorporates two distinct pulsing technologies within a common magnetic...
In the RIKEN TRIP-S3CAN experiment, a series of measurements has been initiated to determine interaction and charge-changing cross sections over a wide range of atomic numbers (Z). The particle identification capability for heavy ions plays an important role in this experiment. By applying velocity corrections to the energy loss measured with ionization chambers, the atomic number of each...
Accelerator Mass Spectrometry (AMS) can detect extremely small amounts of long-lived nuclides ($^{10}$Be, $^{14}$C, $^{36}$Cl, $^{129}$I, etc.) in sample. It is applied for studies of environmental dynamics using seawater or rainwater, cosmic ray event exploration using Antarctic ice core and so on.
We have been developing RI beams using long-lived nuclides provided from the AMS system at the...
Z. Yan1, X. F. Yang1, on behalf of PLASEN collaboration
1School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
The study of exotic structures in unstable nuclei lies at the forefront of nuclear physics [1]. The fundamental properties of these nuclei are intimately related to...
The study of nuclear structure, particularly clustering phenomena in light nuclei such as Carbon-12 (¹²C), is essential for advancing our understanding of nuclear forces and stellar nucleosynthesis. Elastic and inelastic scattering reactions, like ¹²C(p,p)¹²C and ¹²C(α,α)¹²C, are powerful probes for investigating these fundatmental properties. The Active Target Time Projection...
FAZIA (Forward-angle A and Z Identification Array) is a multi-detector array designed to identify charges and masses of the reaction fragments from heavy ion collisions in the Fermi energy domain. One basic unit of FAZIA detector consists of three layers which include two Si sensors with different thicknesses and one CsI scintillator detector read out by a photodiode, forming the FAZIA...
We aim to investigate alpha-clusters in alpha-conjugate nuclei, such as 12C and 16O, using the Active-Target Time Projection Chamber (AT-TPC). Performance test of prototype AT-TPCs were conducted using a 200 MeV/u carbon beam at the Heavy Ion Medical Accelerator in Chiba (HIMAC). The results from this test provide valuable insights for the development and optimization of the Sejong TPC-Drum,...
