Experimental studies of the D2 line of 87 Rb vapour at 1.5 Tesla

An investigation into the temperature evolution of transmission and absorption coefficient spectra of Rubidium atoms in the hyperfine Paschen-Back regime was successfully undertaken for a continuous laser detuning of approximately 150 GHz. All experiments were undertaken using a 1 mm long cell of isotopically enhanced 87Rb. The magnet used had a peak field of 1.54 T. The forms of both the S0 and S1 Stokes Parameters showed excellent agreement with the theory from ElecSus at temperatures ranging from 56◦C to 160◦C, with the S0 parameter also agreeing in narrow-band spectra of up to 20 GHz.The absorption coefficient ratio of strong transitions, expected to be equal to 3.00, was measured to be within their uncertainty of this value when a possible temperature fluctuation of <1 K was taken into account. Both the strong and weak transitions were measured and compared to the theory from ElecSus, which was found to successfully predict the behaviour of 87Rb atoms in the hyperfine Paschen-Back regime. Areas of expansion and improvement of the ElecSus program were identified.The power evolution of the D2 line of Rubidium was also investigated for a narrow beam of w < 0.4 mm in both no external magnetic field and the hyperfine Paschen-Back regime. The inhomogeneous shape of the power evolution was found to not fit the data, while the χ2 analysis showed that the homogeneous shape was better. The Weak Probe regime was found to be reached at values of I/Isat up to 2 orders of magnitude higher than the 1e−3 found previously. This provides possibilities for applications such that the SNR can be increased when measuring transmission or absorption coefficients. It is unclear whether the use of a magnetic field significantly changes the intensity required to reach the Weak Probe regime. This should be investigated using a wider beam, with a different experimental cell

Thallium Poisoning in the Dog

Thallium compounds have been used as rodenticides for many years. Reports of poisoning of domestic animals by thallium were published as early as 1920. The general use of these compounds by pest control companies, and their availability to the general public has increased the frequency of accidental poisoning of domestic animals

Veterinary Toxicology - To Make a Diagnosis

Veterinary Toxicology is rapidly becoming recognized as a distinct discipline in veterinary medicine for several reasons. The use of chemicals for agricultural and household purposes has steadily increased during the last two decades, resulting in equally increased opportunities for poisoning in animals

The shrimp fishery in North Carolina considered in terms of productivity potentialities

Also part of series: Special report from the Virginia Fisheries Laboratory ; no. 1

Rediscovery of the Elements

Article describing the career and discoveries of Georgius Agricola. Tourist information regarding locations important to his life are visited and discussed

Rediscovery of the Elements

Article describing the discovery of rhenium and technetium by Walter Karl Friedrich Noddack and Ida Eva Noddack-Tacke. Information regarding pertinent locations is included

Rediscovery of the Elements

Article describing the isolation of elemental fluorine. Tourist information is given regarding locations pertinent to the element's history

Rediscovery of the Elements

Article describing the life and career of Martin Heinrich Klaproth, including his discoveries of uranium and zirconium. Tourist information regarding locations significant to his history is included

Math in Motion

Everything we know about the universe rests on the foundation of mathematics. Somehow, though, the magic of mathematics – the true power of numbers and their beautiful wildness – gets lost in math class. Children, our most magical thinkers, get turned off math in grade school and miss out on a language through which they could learn to read and change the world. VCU Math In Motion will generate a creative, dynamic STEM education initiative within the Richmond community using an innovative curriculum and a customized mobile unit to bring the beauty of math to Richmond region school children in grades 5-9, through partnerships across VCU and within the local school system

Rediscovery of the Elements

Article describing the importance of the Harz Mountains and the University of Göttingen in the discovery of cadmium and thallium. Tourist information regarding the area is included