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  1. Article ; Online: Nuclear Charge Radius of ^{26m}Al and Its Implication for V_{ud} in the Quark Mixing Matrix.

    Plattner, P / Wood, E / Al Ayoubi, L / Beliuskina, O / Bissell, M L / Blaum, K / Campbell, P / Cheal, B / de Groote, R P / Devlin, C S / Eronen, T / Filippin, L / Garcia Ruiz, R F / Ge, Z / Geldhof, S / Gins, W / Godefroid, M / Heylen, H / Hukkanen, M /
    Imgram, P / Jaries, A / Jokinen, A / Kanellakopoulos, A / Kankainen, A / Kaufmann, S / König, K / Koszorús, Á / Kujanpää, S / Lechner, S / Malbrunot-Ettenauer, S / Müller, P / Mathieson, R / Moore, I / Nörtershäuser, W / Nesterenko, D / Neugart, R / Neyens, G / Ortiz-Cortes, A / Penttilä, H / Pohjalainen, I / Raggio, A / Reponen, M / Rinta-Antila, S / Rodríguez, L V / Romero, J / Sánchez, R / Sommer, F / Stryjczyk, M / Virtanen, V / Xie, L / Xu, Z Y / Yang, X F / Yordanov, D T

    Physical review letters

    2023  Volume 131, Issue 22, Page(s) 222502

    Abstract: ... important for the estimation of V_{ud} in the Cabibbo-Kobayashi-Maskawa matrix, is thus shifted by 1 ...

    Abstract Collinear laser spectroscopy was performed on the isomer of the aluminium isotope ^{26m}Al. The measured isotope shift to ^{27}Al in the 3s^{2}3p ^{2}P_{3/2}^{○}→3s^{2}4s ^{2}S_{1/2} atomic transition enabled the first experimental determination of the nuclear charge radius of ^{26m}Al, resulting in R_{c}=3.130(15)  fm. This differs by 4.5 standard deviations from the extrapolated value used to calculate the isospin-symmetry breaking corrections in the superallowed β decay of ^{26m}Al. Its corrected Ft value, important for the estimation of V_{ud} in the Cabibbo-Kobayashi-Maskawa matrix, is thus shifted by 1 standard deviation to 3071.4(1.0) s.
    Language English
    Publishing date 2023-12-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.222502
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  2. Article ; Online: III-V on silicon avalanche photodiodes by heteroepitaxy.

    Yuan, Yuan / Jung, Daehwan / Sun, Keye / Zheng, Jiyuan / Jones, Andrew H / Bowers, John E / Campbell, Joe C

    Optics letters

    2019  Volume 44, Issue 14, Page(s) 3538–3541

    Abstract: We demonstrate a III-V avalanche photodiode (APD) grown by heteroepitaxy on silicon. This InGaAs ...

    Abstract We demonstrate a III-V avalanche photodiode (APD) grown by heteroepitaxy on silicon. This InGaAs/InAlAs APD exhibits low dark current, gain >20, external quantum efficiency >40%, and similar low excess noise, k∼0.2, as InAlAs APDs on InP.
    Language English
    Publishing date 2019-07-10
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.44.003538
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  3. Book ; Online: Biaxial Strain Modulated Valence Band Engineering in III-V Digital Alloys

    Ahmed, Sheikh Z. / Tan, Yaohua / Zheng, Jiyuan / Campbell, Joe C. / Ghosh, Avik W.

    2021  

    Abstract: Some III-V digital alloy avalanche photodiodes exhibit low excess noise. These alloys have low hole ... structure modification with substrate lattice constant for other III-V digital alloys. ...

    Abstract Some III-V digital alloy avalanche photodiodes exhibit low excess noise. These alloys have low hole ionization coefficients due to presence of small 'minigaps', enhanced effective mass and large separation between light-hole and split-off bands in the valence band. In this letter, an explanation for the formation of the minigaps using a tight binding picture is provided. Furthermore, we demonstrate that decreasing substrate lattice constant can increase the minigap size and mass in the transport direction. This leads to reduced quantum tunneling and phonon scattering of the holes. Finally, we illustrate the band structure modification with substrate lattice constant for other III-V digital alloys.
    Keywords Condensed Matter - Materials Science
    Publishing date 2021-11-07
    Publishing country us
    Document type Book ; Online
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  4. Article: Does the Variability of Evoked Tympanic Membrane Displacement Data (V

    Sharif, Sammy J / Campbell-Bell, Cherith M / Bulters, Diederik O / Marchbanks, Robert J / Birch, Anthony A

    Acta neurochirurgica. Supplement

    2018  Volume 126, Page(s) 103–106

    Abstract: Objectives: Evoked tympanic membrane displacement (TMD) measurements, quantified by V ... to produce average pulse amplitude (PA) waveforms and evoked data were analysed to calculate average V ... Results: There was a strong positive correlation between PA and V : Conclusion: This study shows ...

    Abstract Objectives: Evoked tympanic membrane displacement (TMD) measurements, quantified by V
    Materials and methods: Spontaneous and evoked TMD data from each ear in the sitting and supine position were recorded from 100 healthy volunteers using the MMS-14 CCFP analyser. ECG was also recorded to identify each heartbeat. Using bespoke software written in Matlab, spontaneous data were analysed to produce average pulse amplitude (PA) waveforms and evoked data were analysed to calculate average V
    Results: There was a strong positive correlation between PA and V
    Conclusion: This study shows that large V
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Electrocardiography ; Female ; Healthy Volunteers ; Humans ; Intracranial Pressure/physiology ; Male ; Middle Aged ; Posture ; Pulse ; Reflex, Acoustic/physiology ; Reproducibility of Results ; Tympanic Membrane/physiology ; Young Adult
    Language English
    Publishing date 2018
    Publishing country Austria
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 0065-1419
    ISSN 0065-1419
    DOI 10.1007/978-3-319-65798-1_22
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  5. Article: Rapid and Accurate C-V Measurements.

    Kim, Ji-Hong / Shrestha, Pragya R / Campbell, Jason P / Ryan, Jason T / Nminibapiel, David / Kopanski, Joseph J / Cheung, Kin P

    IEEE transactions on electron devices

    2016  Volume 63, Issue 10, Page(s) 3851–3856

    Abstract: We report a new technique for the rapid measurement of full capacitance-voltage (C-V ... capacitor under test. A C-V curve can be constructed directly from this data but is severely distorted due ... correction to the measured C-V curve of the unknown MOS capacitor can then be done by simple deconvolution ...

    Abstract We report a new technique for the rapid measurement of full capacitance-voltage (C-V) characteristic curves. The displacement current from a 100 MHz applied sine-wave, which swings from accumulation to strong inversion, is digitized directly using an oscilloscope from the metal-oxide-semiconductor (MOS) capacitor under test. A C-V curve can be constructed directly from this data but is severely distorted due to non-ideal behavior of real measurement systems. The key advance of this work is to extract the system response function using the same measurement set-up and a known MOS capacitor. The system response correction to the measured C-V curve of the unknown MOS capacitor can then be done by simple deconvolution. No de-skewing and/or leakage current correction is necessary, making it a very simple and quick measurement. Excellent agreement between the new fast C-V method and C-V measured conventionally by an LCR meter is achieved. The total time required for measurement and analysis is approximately 2 seconds, which is limited by our equipment.
    Language English
    Publishing date 2016-08-30
    Publishing country United States
    Document type Journal Article
    ISSN 0018-9383
    ISSN 0018-9383
    DOI 10.1109/TED.2016.2598855
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  6. Article ; Online: Management of combined factor V and factor VIII deficiency in pregnancy.

    Fogarty, Helen / Doyle, Mairead M / Campbell, Raechel / Keenan, Catriona / White, Barry / Ryan, Kevin / O'Donnell, James S / Slevin, John / O'Keeffe, Denis / O'Connell, Niamh M / Lavin, Michelle

    Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology

    2018  Volume 39, Issue 2, Page(s) 271–272

    MeSH term(s) Adult ; Cesarean Section ; Factor V Deficiency/blood ; Factor V Deficiency/therapy ; Female ; Hemophilia A/blood ; Hemophilia A/therapy ; Humans ; Pregnancy ; Pregnancy Complications, Hematologic/blood ; Pregnancy Complications, Hematologic/therapy ; Pregnancy, High-Risk ; Prothrombin Time ; Risk Factors
    Language English
    Publishing date 2018-04-18
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 604639-3
    ISSN 1364-6893 ; 0144-3615
    ISSN (online) 1364-6893
    ISSN 0144-3615
    DOI 10.1080/01443615.2018.1448766
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2461: Show issues Location:
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  7. Book ; Online: Atomistic transport modeling, design principles and empirical rules for Low Noise III-V Digital Alloy Avalanche Photodiodes

    Ahmed, Sheikh Z. / Tan, Yaohua / Zheng, Jiyuan / Campbell, Joe C. / Ghosh, Avik W.

    2021  

    Abstract: A series of III-V ternary and quarternary digital alloy avalanche photodiodes (APDs) have recently ...

    Abstract A series of III-V ternary and quarternary digital alloy avalanche photodiodes (APDs) have recently been seen to exhibit very low excess noise. Using band inversion of an environment-dependent atomistic tight binding description of short period superlattices, we argue that a combination of increased effective mass, minigaps and band split-off are primarily responsible for the observed superior performance. These properties significantly limit the ionization rate of one carrier type, either holes or electrons, making the avalanche multiplication process unipolar in nature. The unipolar behavior in turn reduces the stochasticity of the multiplication gain. The effects of band folding on carrier transport are studied using the Non-Equilibrium Green's Function Method that accounts for quantum tunneling, and Boltzmann Transport Equation model for scattering. It is shown here that carrier transport by intraband tunneling and optical phonon scattering are reduced in materials with low excess noise. Based on our calculations, we propose five simple inequalities that can be used to approximately evaluate the suitability of digital alloys for designing low noise photodetectors. We evaluate the performance of multiple digital alloys using these criteria and demonstrate their validity.

    Comment: 13 pages, 13 figures and 4 tables
    Keywords Condensed Matter - Mesoscale and Nanoscale Physics ; Condensed Matter - Materials Science
    Publishing date 2021-09-05
    Publishing country us
    Document type Book ; Online
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  8. Article: The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys.

    Lindwall, Greta / Wang, Peisheng / Kattner, Ursula R / Campbell, Carelyn E

    JOM (Warrendale, Pa. : 1989)

    2018  Volume 70, Issue 9, Page(s) 1692–1705

    Abstract: ... vanadium system employing the CALculation of PHAse Diagrams method and a complete model of the O-Ti-V ...

    Abstract Oxygen is always a constituent in "real" titanium alloys including titanium alloy powders used for powder-based additive manufacturing (AM). In addition, oxygen uptake during powder handling and printing is hard to control and, hence, it is important to understand and predict how oxygen is affecting the microstructure. Therefore, oxygen is included in the evaluation of the thermodynamic properties of the titanium-vanadium system employing the CALculation of PHAse Diagrams method and a complete model of the O-Ti-V system is presented. The
    Language English
    Publishing date 2018-07-11
    Publishing country United States
    Document type Journal Article
    ISSN 1047-4838
    ISSN 1047-4838
    DOI 10.1007/s11837-018-3008-8
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  9. Article: Vanadium (V) oxide mediated bromolactonization of alkenoic acids

    Campbell, McKenzie L / Daniel C. Whitehead / Lauren N. Giambalvo / Samuel A. Rackley

    Tetrahedron. 2015 June 10, v. 71

    2015  

    Abstract: A full account of our recently communicated method for the V2O5 mediated bromolactonization of alkenoic acids is presented. Here we describe the extensive evaluation of the metal oxide catalyst, terminal oxidant, halide source, solvent system, and ... ...

    Abstract A full account of our recently communicated method for the V2O5 mediated bromolactonization of alkenoic acids is presented. Here we describe the extensive evaluation of the metal oxide catalyst, terminal oxidant, halide source, solvent system, and reaction temperature that resulted in optimal conditions employing 0.05 equiv V2O5, 3 equiv urea-hydrogen peroxide complex (UHP), and 3 equiv of NH4Br in an acetone:H2O (6:1) solvent system at room temperature. Additionally, we have expanded the substrate scope of the reaction with the aim of evaluating the functional group tolerance of the transformation. Further, we present preliminary data of a related halogenation of β-diketones with our optimal conditions. Finally, we probed the role of urea in the transformation.
    Keywords acids ; ambient temperature ; catalysts ; chemical reactions ; chemical structure ; oxidants ; solvents ; urea ; vanadium
    Language English
    Dates of publication 2015-0610
    Size p. 3895-3902.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 204285-x
    ISSN 1464-5416 ; 0040-4020 ; 0563-2064
    ISSN (online) 1464-5416
    ISSN 0040-4020 ; 0563-2064
    DOI 10.1016/j.tet.2015.04.029
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Narcissistic personality disorder and the DSM-V.

    Miller, Joshua D / Widiger, Thomas A / Campbell, W Keith

    Journal of abnormal psychology

    2010  Volume 119, Issue 4, Page(s) 640–649

    Abstract: We address 3 issues relevant to narcissistic personality disorder (NPD) and the DSM-V. First ... we argue that the DSM-V must include content (in diagnostic form or within a dimensional trait model ...

    Abstract We address 3 issues relevant to narcissistic personality disorder (NPD) and the DSM-V. First, we argue that excluding NPD while retaining other traditional personality disorder constructs (e.g., avoidant) makes little sense given the research literature on NPD and trait narcissism and their association with clinically relevant consequences such as aggression, self-enhancement, distorted self-presentation, failed relationships, cognitive biases, and internalizing and externalizing dysregulation. Second, we argue that the DSM-V must include content (in diagnostic form or within a dimensional trait model) that allows for the assessment of both grandiose and vulnerable variants of narcissism. Finally, we suggest that any dimensional classification of personality disorder should recover all of the important component traits of narcissism and be provided with official recognition in the coding system.
    MeSH term(s) Aggression/psychology ; Diagnostic and Statistical Manual of Mental Disorders ; Humans ; Interpersonal Relations ; Personality Disorders/classification ; Personality Disorders/diagnosis ; Personality Disorders/psychology ; Social Behavior
    Language English
    Publishing date 2010-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3127-6
    ISSN 1939-1846 ; 0021-843X ; 0096-851X ; 0145-2339 ; 0145-2347
    ISSN (online) 1939-1846
    ISSN 0021-843X ; 0096-851X ; 0145-2339 ; 0145-2347
    DOI 10.1037/a0019529
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