Tag Archive for 'Helium-4'

Nucleon densities for several low-lying states of carbon-12; each image is labeled with the spin (0 to 3), the sign under parity inversion (+ or -), and the excitation number (1 to 3). Image credit: Shihang Shen.

New Research Sheds Light on Structure of Carbon Nucleus

Dec 27, 2023 by News Staff

The carbon atom provides the backbone for the complex organic chemistry composing the building blocks of life. The physics of the carbon nucleus in its...

Schematic illustration of the quasi-elastic reaction investigated by Duer et al. Top: quasi-elastic scattering of the helium-4 (4He) core from a helium-8 (8He) projectile off a proton target in the laboratory frame. The length of the arrows represents the momentum per nucleon (the velocity) of the incoming and outgoing particles. Zbeam is the beam axis. Bottom: the equivalent p-4He elastic scattering in their center-of-mass frame, where we consider reactions at backward angles close to 180°. In this frame, the momentum of the proton balances that of 4He, Pp=−P4He, that is, the proton is four times faster than 4He. Image credit: Duer et al., doi: 10.1038/s41586-022-04827-6.

Physicists Observe Elusive Four-Neutron System: Tetraneutron

Jun 23, 2022 by Enrico de Lazaro

Physicists using the Superconducting Analyzer for Multi-particles from Radio Isotope Beams (SAMURAI) in Japan have experimentally observed a resonance-like...

The trace of an α particle obtained by the nuclear physicist Wolfhart Willimczik with his spark chamber specially made for α particles.

Physicists Precisely Measure Charge Radius of Alpha Particle

Jan 28, 2021 by Enrico de Lazaro

Using a method called atomic spectroscopy, an international team of physicists has produced a new value for the charge radius of the α particle, the nucleus...

Experimental apparatus used to synthesize pionic helium atoms at the Paul Scherrer Institute. Image credit: ASACUSA Collaboration, CERN.

CERN Physicists Create Atoms of Pionic Helium

May 13, 2020 by News Staff

Physicists from the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) Collaboration at CERN have successfully synthesized and studied...

Anomalies in nuclear physics experiments may show signs of a new force. Image credit: Jw210913.

X17 Particle Might Solve Mystery of Dark Matter

Dec 10, 2019 by The Conversation

Professor Attila Krasznahorkay and his colleagues at ATOMKI (the Institute of Nuclear Research in Debrecen, Hungary) recently published a paper that hints...