High resolution spectroscopy of B0←X0 transitions in Te: Reference lines spanning the 443.2-451.4 nm region.

Molecular tellurium (Te) has long been regarded as a promising candidate for a variety of spectroscopic applications, especially as a frequency reference. Absorption lines of Te were published extensively in the past few decades, however, the spectral resolution was not sufficiently high to be considered a precision spectroscopic reference. Here, a high resolution spectral atlas of Te Doppler-free saturated absorption transitions is reported, and used to assign multiple ro-vibrational bands in the B(Σu-3)0←X(Σu-3)0 electronic transition via the Dunham model, giving updated Dunham parameters and diatomic constants for the B(Σu-3)0 state at an unprecedented level of precision.

Air and surface sampling for monkeypox virus in a UK hospital: an observational study.

Background: An outbreak of monkeypox virus infections in non-endemic countries was recognised on May 12, 2022. As of September 29, more than 67 000 infections have been reported globally, with more than 3400 confirmed cases in the UK by September 26. Monkeypox virus is believed to be predominantly transmitted through direct contact with lesions or infected body fluids, with possible involvement of fomites and large respiratory droplets.