We have repeated the experiment of Taleyarkhan et al. in an attempt to detect the emission of neutrons from d-d fusion during bubble collapse in deuterated acetone. Using the same apparatus, a more sophisticated data acquisition system, and a larger scintillator detector, we find no evidence for 2.5-MeV neutron emission correlated with sonoluminescence from the collapsing bubbles. Any neutron e...

Introduction: In recent years, the use of neutrons has increased in various fields such as medicine and industry. One of the important applications of neutrons is in medical research. Neutrons have greater linear energy transfer than gamma rays and are considered more dangerous radiation. Hence, the detection and determination of neutron dose is a very important and vital issu...

1.1 Introduction Most recent nucleosynthesis parameter studies [3, 4, 11] place questions on the ability of high entropy neutrino wind scenarios in type II supernovae to produce r-process nuclei for A < 110 in correct amounts. In addition, it remains an open question whether the entropies required for the nuclei with A > 110 can actually be attained in type II supernova events. Thus, an alterna...

Long baseline interferometers to detect gravitational waves such as TAMA300 [1], GEO600 [2], VIRGO [3], LIGO [4] will be in operation by the end of this century or the beginning of the 21st century. One of the most important sources of gravitational waves for such detectors are coalescing binary neutron stars. PSR1913+16 is the first binary neutron stars found by Hulse and Taylor. The existence...

We have repeated the experiment of Taleyarkhan et al. in an attempt to detect the emission of neutrons from d-d fusion during bubble collapse in deuterated acetone. Using the same apparatus, a more sophisticated data acquisition system, and a larger scintillator detector, we find no evidence for 2.5-MeV neutron emission correlated with sonoluminescence from the collapsing bubbles. Any neutron e...

The assumption that the shape of the epithermal neutron spectrum can be described, in any research reactor, by the 1/E1+α function is a fundamental starting point of the k0 standardization. This assumption may be questioned from a reactor physics viewpoint. The type of moderator, the existence of neutron reflectors, the additional production of (γ, n) neutrons and resonance capture by construct...

Multi-step nuclear reactions in the core of an OMEGA implosion can be used to infer the density of the deuterium-tritium (DT) fuel at peak compression, an important measure of the implosion performance. A three-step process leads to the production of tertiary neutrons with energies up to 30 million electron volts (MeV), more than twice the energy of the primary neutrons (14.1 MeV) from the dire...

We model the nucleosynthesis during a radiative interpulse phase of a rotating 3M⊙ Asymptotic Giant Branch (AGB) star. We find an enhanced production of the neutron source species C compared to non-rotating models due to shear mixing of protons and C at the core-envelope interface. We estimate that the resulting total production of heavy elements by slow neutron capture (s-process) is too low t...

Galectin-3 is an important protein in molecular signalling events involving carbohydrate recognition, and an understanding of the hydrogen-bonding patterns in the carbohydrate-binding site of its C-terminal domain (galectin-3C) is important for the development of new potent inhibitors. The authors are studying these patterns using neutron crystallography. Here, the production of perdeuterated h...