C. Fitzpatrick

University of Manchester

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A. Heinz

Chalmers University of Technology

V. Werner

Technical University of Darmstadt

R. Lutter

Ludwig-Maximilians-Universität München

G. Gürdal

Argonne National Laboratory

A. Blazhev

University of Cologne

C. Fransen

University of Cologne

N. Warr

University of Cologne

E. Clément

GANIL

R. Gernhäuser

Technical University of Munich

A. Petts

EDF Energy (United Kingdom)

Cooperative Institutions

European Organization for Nuclear Research

500

Centre National de la Recherche Scientifique

291

University of Chinese Academy of Sciences

283

Tsinghua University

273

Centro Brasileiro de Pesquisas Físicas

227

Peking University

218

State Key Laboratory of Nuclear Physics and Technology

200

Institute of High Energy Physics

195

Institut National de Physique Nucléaire et de Physique des Particules

191

Central China Normal University

175

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Frontal oscillations on the NE newfoundland shelf

ATMOSPHERE-OCEAN (1991)

Savithri Narayanan E.B. Colboume C. Fitzpatrick

Abstract An examination of the temperature and current measurements from the NE Newfoundland Shelf indicates significant frontal variability at about a 7‐day period during the months of June‐September 1989. The oscillations recorded in 1989 appeared to have propagated into the region from the Labrador Shelf. Significant variability in the position of the shelf water/slope water front in the Bonavista area is also found between years and within the same year. Time series measurements also indicated that the transition from winter to summer conditions in the inshore region may be occurring during late July to early August.

10.1080/07055900.1991.9649416

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Centrifugal stretching along the ground state band ofHf168

Physical Review C (2009)

Aaron Costin M. Reese H. Ai R. F. Casten Kevin Dusling

The lifetimes of the ${J}^{\ensuremath{\pi}}={4}^{+}$, ${6}^{+}$, ${8}^{+}$, and ${10}^{+}$ levels along the ground state band in $^{168}\mathrm{Hf}$ were measured by means of the recoil distance Doppler shift (RDDS) method using the New Yale Plunger Device (NYPD) and the SPEEDY detection array at Wright Nuclear Structure Laboratory of Yale University. Excited states in $^{168}\mathrm{Hf}$ were populated using the $^{124}\mathrm{Sn}(^{48}\mathrm{Ti},4n)$ fusion evaporation reaction. The new lifetime values are sufficiently precise to clearly prove the increase of quadrupole deformation as a function of angular momentum in the deformed nucleus $^{168}\mathrm{Hf}$. The data agree with the predictions from the geometrical confined $\ensuremath{\beta}$-soft (CBS) rotor model that involves centrifugal stretching in a soft potential.

10.1103/physrevc.79.024307

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Citations (11)

G factor of the 2+1 state of 170Hf

Physical review. C (2007)

A. Wolf Z. Berant A. Heinz V. Werner E. A. McCutchan

The g factor of the 2 + 1 state of 170 Hf was measured by perturbed γ-γ angular correlation in a static external magnetic field. The result, g(2 + 1 ) = 0.28(5), extends the systematics of g factors of even-even Hf isotopes to N = 98 and enables a better test of theoretical models. The g(2 + 1 ) experimental values of these isotopes exhibit a remarkable constancy as a function of neutron number. This phenomenon, which was also observed for other isotopic chains in the Gd-W range, is explained in terms of a recently proposed empirical model.

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Low-energy Coulomb excitation of Sr96,98 beams

Physical review. C (2016)

E. Clément M. Zielińska S. Péru Héloïse Goutte S. Hilaire

The structure of neutron-rich $^{96,98}\mathrm{Sr}$ nuclei was investigated by low-energy safe Coulomb excitation of radioactive beams at the REX-ISOLDE facility, CERN, with the MINIBALL spectrometer. A rich set of transitional and diagonal $E2$ matrix elements, including those for non-yrast structures, has been extracted from the differential Coulomb-excitation cross sections. The results support the scenario of a shape transition at $N=60$, giving rise to the coexistence of a highly deformed prolate and a spherical configuration in $^{98}\mathrm{Sr}$, and are compared to predictions from several theoretical calculations. The experimental data suggest a significant contribution of the triaxal degree of freedom in the ground state of both isotopes. In addition, experimental information on low-lying states in $^{98}\mathrm{Rb}$ has been obtained.

Coulomb excitation

Yrast

10.1103/physrevc.94.054326

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Citations (37)

Anomalies in the Plumes of the Mississippi and Atchafalaya Rivers: Freshwater, Oceanographic and Climatic Controls

AGUFM (2018)

C. Fitzpatrick Alexander S. Kolker Philip Chu

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Onset of collectivity in^96,98Sr studied via Coulomb excitation

EPJ Web of Conferences (2014)

E. Clément A. Görgen A. Dijon G. de France B. Bastin

A rapid onset of quadrupole deformation is known to occur around the neutron number 60 in the neutron-rich Zr and Sr isotopes. This shape change has made the neutron-rich A = 100 region an active area of experimental and theoretical studies for many decades now. We report in this contribution new experimental results in the neutron rich 96,98Sr investigated by safe Coulomb excitation of radioactive beams at the REX-ISOLDE facility, CERN. Reduced transition probabilities and spectroscopic quadrupole moments have been extracted from the differential Coulomb excitation cross section supporting the scenario of shape coexistence/change at N=60. Future perspectives are presented including the recent experimental campaign performed at ILL-Grenoble.

Coulomb excitation

Neutron number

10.1051/epjconf/20146602021

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Re-interpretation of the structure of $^{184}$Pt

Bulletin of the American Physical Society (2005)

R. B. Cakirli E. A. McCutchan R. F. Casten H. Ai C. Fitzpatrick

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Investigation of 0$^+$ states in Rare Earth Region Nuclei

Bulletin of the American Physical Society (2005)

Diane Meyer G. Graw G. Herten H.–F. Wirth R. F. Casten

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Sandy Beaches of Brazilian Oceanic Islands

Coastal research library (2016)

Lauro Júlio Calliari Pedro de Souza Pereira Andrew D. Short Fernando C. Sobral Arthur Antônio Machado

10.1007/978-3-319-30394-9_19

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Wide-field phase imaging for the endoscopic detection of dysplasia and early-stage esophageal cancer

C. Fitzpatrick George S. D. Gordon Travis W. Sawyer Sarah E. Bohndiek T. M. Wilkinson

Esophageal cancer has a 5-year survival rate below 20%, but can be curatively resected if it is detected early. At present, poor contrast for early lesions in white light imaging leads to a high miss rate in standard-of- care endoscopic surveillance. Early lesions in the esophagus, referred to as dysplasia, are characterized by an abundance of abnormal cells with enlarged nuclei. This tissue has a different refractive index profile to healthy tissue, which results in different light scattering properties and provides a source of endogenous contrast that can be exploited for advanced endoscopic imaging. For example, point measurements of such contrast can be made with scattering spectroscopy, while optical coherence tomography generates volumetric data. However, both require specialist interpretation for diagnostic decision making. We propose combining wide-field phase imaging with existing white light endoscopy in order to provide enhanced contrast for dysplasia and early-stage cancer in an image format that is familiar to endoscopists. Wide-field phase imaging in endoscopy can be achieved using coherent illumination combined with phase retrieval algorithms. Here, we present the design and simulation of a benchtop phase imaging system that is compatible with capsule endoscopy. We have undertaken preliminary optical modelling of the phase imaging setup, including aberration correction simulations and an investigation into distinguishing between different tissue phantom scattering coefficients. As our approach is based on phase retrieval rather than interferometry, it is feasible to realize a device with low-cost components for future clinical implementation.

10.1117/12.2290910

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