Ambiguity of gamma-ray tracking of "two-interaction" events

Tracking of gamma-ray interactions in germanium detectors can allow reconstruction of the photon paths, and is useful for many applications. Scrutiny of the kinematics and geometry of gamma rays which are Compton scattered only once prior to full absorption reveals that there are cases where even perfect spatial and energy resolution cannot resolve the true interaction sequence and consequently gamma-ray tracks cannot be reconstructed. The photon energy range where this ambiguity exists is from 255 keV to around 700 keV. This is a region of importance for nuclear structure research where two-point interactions are probable.Comment: 8 pages, 2 figure

University vaccine campaign increases meningococcal ACWY vaccine coverage

In this study, we report MenACWY vaccine coverage in first year students arriving at the University of Nottingham (UoN) in September 2015. We also report the uptake of MenACWY vaccine offered to unvaccinated students via a campus-based mass vaccination campaign as part of a local initiative by the University of Nottingham Health Service (UNHS), in liaison with UoN, during the registration period. [Taken from introduction

Day hospital - pilot study report

SIGLEAvailable from British Library Document Supply Centre- DSC:q91/08927(Day) / BLDSC - British Library Document Supply CentreGBUnited Kingdo