M. del Santo | Searcharxiv

arXiv2025

Accretion and Ejection Physics at High Time Resolution

Accretion onto compact objects is one of the most fundamental phenomena in the astrophysics, powering some of the most luminous objects in the sky. Along with this, accretion has also a key impact on the evolution of the Universe, through the launch of powerful outflows that affect the surrounding medium. In the last years sub-second optical-infrared observations of accreting X-ray binaries have opened a new window in the study of inflow-outflow connection, discovering a wide range of previously unkown phenomena. Here we review the key open questions in accretion and ejection physics and discuss how a dedicated facility, equipped with photon-counting detectors and high spectral resolution from the UV to the mid-infrared, can enable transformative advances in our understanding of accretion processes.

astro-ph.IM↗

arXiv2016

$β$-particle energy-summing correction for $β$-delayed proton emission measurements

A common approach to studying $β$-delayed proton emission is to measure the energy of the emitted proton and corresponding nuclear recoil in a double-sided silicon-strip detector (DSSD) after implanting the $β$-delayed proton emitting ($β$p) nucleus. However, in order to extract the proton-decay energy, the measured energy must be corrected for the additional energy implanted in the DSSD by the $β$-particle emitted from the $β$p nucleus, an effect referred to here as $β$-summing. We present an approach to determine an accurate correction for $β$-summing. Our method relies on the determination of the mean implantation depth of the $β$p nucleus within the DSSD by analyzing the shape of the total (proton + recoil + $β$) decay energy distribution shape. We validate this approach with other mean implantation depth measurement techniques that take advantage of energy deposition within DSSDs upstream and downstream of the implantation DSSD.

physics.ins-det↗