CRDS study of auto-ionizing Rydberg states of argon in a microwave discharge This article is part of a Special Issue on Spectroscopy at the University of New Brunswick in honour of Colan Linton and Ron Lees.

2009 ◽  
Vol 87 (5) ◽  
pp. 575-581 ◽  
Author(s):  
B. M. van der Ende ◽  
C. Winslade ◽  
R. L. Brooks ◽  
R. H. deLaat ◽  
N. P.C. Westwood

Optical transitions from two microwave discharge excited states of argon have been observed using cavity ring-down spectroscopy. These transitions originate on the high-lying levels, 3d[1/2] 1° and 3d[3/2] 2° , and terminate on the nf ′[5/2] Rydberg (n = 8 to 22) levels, which, except for n = 8, lie between the 2P3/2 and 2P1/2 ionization thresholds. In total, 24 such spectral lines have been observed. The quantum defect for the f ′ series has been measured and is compared to previously measured values. We observe a nearly threefold jump in line width in going from n = 8 to n = 9, below and above the 2P3/2 threshold, respectively. The line widths are broad and increase monotonically with n (above 9), in contrast to the narrowing of line widths usually observed. We cannot attribute this to a single source but conclude that collisional, quasielastic l-mixing of the nf ′[5/2] Rydberg states plays a significant role.

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Daniel Vaquero ◽  
Vito Clericò ◽  
Juan Salvador-Sánchez ◽  
Adrián Martín-Ramos ◽  
Elena Díaz ◽  
...  

Abstract Exciton physics in two-dimensional semiconductors are typically studied by photoluminescence spectroscopy. However, this technique does not allow for direct observation of non-radiating excitonic transitions. Here, we use low-temperature photocurrent spectroscopy as an alternative technique to investigate excitonic transitions in a high-quality monolayer MoS2 phototransistor. The resulting spectra presents excitonic peaks with linewidths as low as 8 meV. We identify spectral features corresponding to the ground states of neutral excitons ($${\mathrm{X}}_{1{\mathrm{s}}}^{\mathrm{A}}$$ X 1 s A and $${\mathrm{X}}_{1{\mathrm{s}}}^{\mathrm{B}}$$ X 1 s B ) and charged trions (TA and TB) as well as up to eight additional spectral lines at energies above the $${\mathrm{X}}_{1{\mathrm{s}}}^{\mathrm{B}}$$ X 1 s B transition, which we attribute to the Rydberg series of excited states of XA and XB. The intensities of the spectral features can be tuned by the gate and drain-source voltages. Using an effective-mass theory for excitons in two-dimensional systems we are able to accurately fit the measured spectral lines and unambiguously associate them with their corresponding Rydberg states.


2009 ◽  
Vol 87 (5) ◽  
pp. 437-441 ◽  
Author(s):  
Anthony J. Merer ◽  
Zicheng Duan ◽  
Robert W. Field ◽  
James K.G. Watson

Perturbations in the K = 1 and 3 levels of the [Formula: see text], 4ν3 state of acetylene are explained as interactions with levels of the [Formula: see text], 31B4 (v3 = 1, v4 + v6 = 4) polyad. A satisfactory least-squares fit to the perturbed level structure has been obtained, treating the 4ν3 state as an asymmetric top perturbed by isolated K = 1 and 3 levels. Accurate deperturbed rotational constants for the interacting states are presented.


1994 ◽  
Vol 33 (03) ◽  
pp. 246-249 ◽  
Author(s):  
R. Haux ◽  
F. J. Leven ◽  
J. R. Moehr ◽  
D. J. Protti

Abstract:Health and medical informatics education has meanwhile gained considerable importance for medicine and for health care. Specialized programs in health/medical informatics have therefore been established within the last decades.This special issue of Methods of Information in Medicine contains papers on health and medical informatics education. It is mainly based on selected papers from the 5th Working Conference on Health/Medical Informatics Education of the International Medical Informatics Association (IMIA), which was held in September 1992 at the University of Heidelberg/Technical School Heilbronn, Germany, as part of the 20 years’ celebration of medical informatics education at Heidelberg/Heilbronn. Some papers were presented on the occasion of the 10th anniversary of the health information science program of the School of Health Information Science at the University of Victoria, British Columbia, Canada. Within this issue, programs in health/medical informatics are presented and analyzed: the medical informatics program at the University of Utah, the medical informatics program of the University of Heidelberg/School of Technology Heilbronn, the health information science program at the University of Victoria, the health informatics program at the University of Minnesota, the health informatics management program at the University of Manchester, and the health information management program at the University of Alabama. They all have in common that they are dedicated curricula in health/medical informatics which are university-based, leading to an academic degree in this field. In addition, views and recommendations for health/medical informatics education are presented. Finally, the question is discussed, whether health and medical informatics can be regarded as a separate discipline with the necessity for specialized curricula in this field.In accordance with the aims of IMIA, the intention of this special issue is to promote the further development of health and medical informatics education in order to contribute to high quality health care and medical research.


2018 ◽  
Vol 15 (1-2) ◽  
pp. 1-5
Author(s):  
Alexandra Kurmann ◽  
Tess Do

This special issue follows a conference entitled ‘Rencontres: A Gathering of Voices of the Vietnamese Diaspora’ that was held at the University of Melbourne, December 1-2 in 2016 and which sought to enable, for the first time, the titular transdiasporic rencontres or encounters between international authors of the Vietnamese diaspora. The present amalgam of previously unpublished texts written by celebrated Francophone and Anglophone authors of Vietnamese descent writing in France, New Caledonia and Australia today is the result of the intercultural exchanges that took place during that event. Literary texts by Linda Lê, Anna Moï and Thanh-Van Tran-Nhut are followed by writerly reflections on the theme of transdiasporic encounters from Hoai Huong Nguyen, Jean Vanmai and Hoa Pham. Framing and enriching these texts, scholarly contributions by established experts in the field consider the literary, cultural and linguistic transfers that characterize contemporary writing by authors of Vietnamese origin across the Francophone world. Ce volume spécial réunit les Actes du colloque ‘Rencontres : A Gathering of Voices of the Vietnamese Diaspora’ qui s’est tenue à l’Université de Melbourne les 1er et 2 décembre 2016 et qui visait à faciliter, pour la première fois, les rencontres entre les auteurs, chercheurs et universitaires internationaux de la diaspora vietnamienne. Les fruits de leurs échanges interculturels y sont réunis dans ce présent recueil sous deux formes complémentaires : d’un côté, les articles d’experts en littérature francophone comparée ; de l’autre, les contributions créatives de célèbres auteurs francophones et anglophones d’origine vietnamienne basés aujourd’hui en France, en Nouvelle Calédonie et en Australie. Les textes littéraires de Linda Lê, Anna Moï et Thanh-Van Tran-Nhut, suivis de réflexions d’auteurs par Hoai Huong Nguyen, Hoa Pham et Jean Vanmai sur le thème des rencontres transdiasporiques, se retrouvent enrichis par les études savantes menées sur les transferts littéraires, culturelles et linguistiques qui caractérisent l’écriture contemporaine des écrivains d’origine vietnamienne dans le monde francophone.


1973 ◽  
Vol 2 (2) ◽  
pp. 297-304
Author(s):  
Daymon W. Thatch ◽  
William L. Park

Rutgers University was chartered as Queen's College on November 10, 1766. It was the eighth institution of higher education founded in Colonial America prior to the Revolutionary War. From its modest beginning in the New Brunswick area the University has grown to eight separately organized undergraduate colleges in three areas of the State, with a wide range of offerings in liberal and applied arts and sciences.


1962 ◽  
Vol 40 (10) ◽  
pp. 1480-1489 ◽  
Author(s):  
J. W. Bichard ◽  
J. C. Giles

The optical absorption spectra of arsenic and phosphorus donor impurities in silicon have been studied under conditions of improved resolution. Absorption lines due to transitions from the impurity ground state to the excited states 2p0, 2p±, 3p0, 3p±, 4p0, 4 p±, and 5p0, and 5p± have been observed at 4.2° K. The relative intensities of some of these absorption lines are compared with existing experimental and theoretical estimates. The contribution of instrumental broadening to the observed line widths is assessed and natural line widths are estimated. The estimates indicate values for the natural line widths which are much less than those previously reported. For phosphorus impurity, the natural line widths are estimated to be less than 0.08 × 10−3 electron volts full width at half-maximum. The possibility of concentration broadening is discussed in connection with the arsenic data.


2014 ◽  
Vol 31 (2-3) ◽  
pp. 263-281 ◽  
Author(s):  
Janet Carsten

The interview was conducted in September 1996 in Cambridge. Marilyn Strathern (MS) and Janet Carsten (JC) had been colleagues at the University of Manchester’s Department of Social Anthropology until September 1993, when Marilyn Strathern left to take up the William Wyse Professorship at the University of Cambridge, where she remained until retirement in 2008. Janet Carsten joined Edinburgh in October of the same year, where she is presently Professor of Social and Cultural Anthropology. (Supplementary questions, reflecting back on the earlier interview, were put to Marilyn Strathern by the editors of the special issue in 2013.)


2015 ◽  
Vol 40 (1) ◽  
pp. 6-8
Author(s):  
Jennifer Lehmann

Children Australia has had the support and advice of many academic and professional practitioners over its many years of publication, with a number of people serving as Editorial Consultants. More recently, a number of international academics have joined our ranks, following in the footsteps of Nicola Taylor, Director of the Children's Issues Centre at the University of Otago, in Auckland, New Zealand, who was the first of our overseas academics. Nicola was the Guest Editor of a Special Issue some time ago, heralding what is now a more regular feature of the journal – encouraging collections of papers addressing specific topics.


Episteme ◽  
2011 ◽  
Vol 8 (1) ◽  
pp. 1-5
Author(s):  
Mikkel Gerken ◽  
Jesper Kallestrup ◽  
Klemens Kappel ◽  
Duncan Pritchard

The articles in this special issue were selected from the 2010 Episteme conference, “Cognitive Ecology: The Role of the Concept of Knowledge in Our Social Cognitive Ecology”, which took place at the University of Edinburgh in June 2010. The overarching purpose of the conference was to explore our epistemic concepts – and the concept of knowledge in particular – from the perspective offered by a social cognitive ecology.


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