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While all atomic nuclei except hydrogen are composed of protons and neutrons, physicists have been searching for a particle consisting of two, three, or four neutrons for over half a century. Experiments by a team of physicists of the Technical University of Munich (TUM) at the accelerator laboratory...now indicate that a particle comprising four bound neutrons may well exist. Should such particle exist, parts of the theory of the strong interaction would need to be rethought. In 2016, a group in Japan attempted to produce tetra-neutrons from helium-4 by bombarding it with a beam of radioactive helium-8 particles. This reaction...

LENR Solution of the Cosmological Lithium Problem # V.I.Vysotskii1 , M.V.Vysotskyy1 , Sergio Bartalucci2 1 Taras Shevchenko National University of Kyiv, Kyiv, 01601, Ukraine 2 http://ikkem.com/iccf23/orppt/ICCF23-OA-10%20Vysotskii.pdf INFN Laboratori Nazionali di Frascati, Frascati, 00044 Italy # E-mail: vivysotskii@gmail.com, Volodymyrska Str. 64, Kyiv, 01601, Ukraine The basis of modern cosmology is the Big Bang theory. The validity of this theory is based on three main facts: a) the redshift of spectral lines of distant stars; b) the presence of cosmic microwave background radiation; c) the theory of primary Big Bang nucleosynthesis (BBN) of light H2 , He3 , He4 , Li6 and...

Experimental setup. As a beam of beryllium comes in from the left, the deuteron Trojan horse intercepts it at the target and delivers its neutron soldier. This allows the decay products of the beryllium and neutron reactions to be captured by a curved array of six detectors on the right. Credit: Hayakawa et al. There is a significant discrepancy between theoretical and observed amounts of lithium in our universe. This is known as the cosmological lithium problem, and it has plagued cosmologists for decades. Now, researchers have reduced this discrepancy by around 10%, thanks to a new experiment on...