Isospin dependence of electromagnetic transition strengths among an isobaric triplet

Electric quadrupole matrix elements, M, for the J=2→0, ΔT=0, T=1 transitions across the A=46 isobaric multiplet Cr-V-Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of M with respect to T. Pairs of nuclei in the T=1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The M values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for Cr and Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in V and Ti. A constant value of M across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T=1 isospin triplets is presented.Peer Reviewe

Caracterización de los pacientes con hemorragia de vías digestivas altas no varicosa en un hospital de tercer nivel de Cundinamarca, Colombia

Upper gastrointestinal tract bleeding is a common emergency whose most common etiology is a peptic ulcer. Restoration of intravascular volume and blood pressure management are priorities before identifying the cause of bleeding. After initial resuscitation and after hemodynamic stabilization has been achieved, an esophagogastroduodenoscopy (EGD) should be performed to identify the cause of bleeding and determine the treatment needed. This is a study performed at a third level referral hospital in Cundinamarca, Colombia. Materials and Methods: This is a retrospective study of data from electronic medical records of adult patients admitted to the emergency room of the Hospital Universitario de la Samaritana (HUS) because of upper gastrointestinal tract bleeding which ahd been diagnosed because of hematemesis, melena, rectal bleeding and/or anemia. Patients all underwent EGD between April 2010 and April 2011. Results: 385 patients with upper gastrointestinal tract bleeding were seen during the study period, but 100 were excluded because of bleeding secondary esophageal varices, incomplete clinical histories and lower gastrointestinal bleeding. A total of 285 patients were included. 69.1 % were older than 60 years, 73.3 % had hypertension, 55.1 % reported use of inflammatory drugs (NSAIDs) and aspirin (ASA), 19.6 % reported previous bleeding episodes, and 17.9 % had hemodynamic instability. 63 patients (22.1 %) required endoscopic hemostasis, and 32 (11.2 %) experienced rebleeding. Overall mortality reported was 13.1 % of which 55.3 % were men. Mortality attributable to gastrointestinal bleeding was 3.1 %. Conclusions: The majority of patients served by the HUS with upper GI bleeding are adults over 60 years. Peptic ulcers remain the most common diagnosis associated with the use of NSAIDs and ASA. The mortality rate is comparable to international standards. © 2013 Asociaciones Colombianas de Gastroenterología

Enfermedad de Alzheimer y disfagia. Desarrollo del compromiso deglutorio

Dysphagia is a common symptom in many neurological diseases, particularly occurring after a stroke or head trauma. Another important group of patients who develop swallowing dysfunctions are older adults with progressive loss of cognitive functions such as patients with Alzheimer's disease. This type of disease is accompanied by difficulty swallowing that has been associated with increased mortality due to respiratory complications that are potentially preventable if dysphagia is recognized early so that appropriate strategies for treatment can be used. © 2013 Asociaciones Colombianas de Gastroenterología, Endoscopia digestiva, Coloproctología y Hepatología

Tuberculosis esofágica: Informe de un caso

We report the case of an immune-competent man with symptoms of upper gastrointestinal bleeding secondary to esophageal ulcers of tubercular origin. Gastrointestinal involvement from Mycobacterium tuberculosis is rare even in patients with numerous occurrences of pulmonary and extrapulmonary diseases. The most frequently affected sites are the terminal ileum and the peritoneum. Esophageal tuberculosis is exotic and is usually secondary to extension from neighboring infected organs such as the mediastinal nodes and/or the bronchi. Clinical, endoscopic and radiological pictures of the esophageal disease often mimic malignancy. Tuberculosis treatment is the mainstay of treatment, and surgery is rarely required. © 2014 Asociaciones Colombianas de Gastroenterología, Endoscopia digestiva, Coloproctología y Hepatología

Isomeric Ratios in 206Hg

International audience206Hg was populated in the fragmentation of an E∕A = 1 GeV 208Pb beam at GSI. It was part of a campaign to study nuclei around 208Pb via relativistic Coulomb excitation. The observation of the known isomeric states confirmed the identification of the fragmentation products. The isomeric decays were also used to prove that the correlations between beam identification detectors and the AGATA γ-ray tracking array worked properly and that the tracking efficiency was independent of the time relative to the prompt flash

Isospin dependence of electromagnetic transition strengths among an isobaric triplet

Electric quadrupole matrix elements, Mp, for the Jπ=2+→0+, ΔT=0, T=1 transitions across the A=46 isobaric multiplet 46Cr-46V-46Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of Mp with respect to Tz. Pairs of nuclei in the T=1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The Mp values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for 46Cr and 46Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in 46V and 46Ti. A constant value of Mp across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T=1 isospin triplets is presented.peerReviewe

Benchmarking the PreSPEC@GSI Experiment for Coulex-multipolarimetry on the π(p_3/2) → π(p_1/2) spin-flip transition in ⁸⁵Br

A first performance test of the Coulomb excitation multipolarimetry (Coulex-multipolarimetry) method is presented. It is based on a 85Br π(p3/2) → π(p1/2) spin-flip experiment performed as part of the PreSPEC-AGATA campaign at the GSI Helmholtzzentrum für Schwerionenforschung (GSI). Via determination of background levels around the expected 85Br excitations as well as measured 197Au excitations, an upper limit for the M1 transition strength of the 1/2⁻₁ → 3/2⁻g.s. transition in 85Br and a lower beam time limit for upcoming experimental campaigns utilizing Coulex-multipolarimetry have been inferred. The impact of the use of AGATA in its anticipated 1π configuration on these estimates is deduced via Geant4 simulations