Linear gas stoppers are widely used to convert high-energy, rare-isotope beams and reaction products into low-energy beams with small transverse emittance and energy spread. Stopping of the high-energy ions is achieved through interaction with a buffer gas, typically helium, generating large quantities of He+/e− pairs. The Advanced Cryogenic Gas Stopper (ACGS) was designed for fast, efficient stopping and extraction of high-intensity, rare-isotope beams. As part of the design process, a comprehensive particle-in-cell code was developed to optimize the transport and extraction of rare isotopes from the ACGS in the presence of space charge, including He+/e− dynamics, buffer gas interactions including gas flow, radio-frequency carpets, and ion extraction through a nozzle or orifice. Details of the simulations are presented together with comparison to experiment when available.

VL - 496 UR - https://www.sciencedirect.com/science/article/pii/S0168583X21001117 ER - TY - JOUR T1 - High-precision B(E2) Measurements of Semi-Magic 58,60,62,64Ni by Coulomb Excitation JF - PHYSICAL REVIEW C Y1 - 2014 A1 - J.M. Allmond A1 - B. A. Brown A1 - A.E. Stuchbery A1 - A. Galindo-Uribarri A1 - E. Padilla-Rodal A1 - D.C. Radford A1 - J.C. Batchelder A1 - M.E. Howard A1 - J.F. Liang A1 - B. Manning A1 - R.L. Varner A1 - C.H. Yu VL - 90 UR - http://journals.aps.org/prc/abstract/10.1103/PhysRevC.90.034309 ER - TY - JOUR T1 - High-resolution two-proton stripping to 2p-1h 7/2− states via the 59Co(3He,nγ)61Cu reaction JF - THE EUROPEAN PHYSICAL JOURNAL A Y1 - 2014 A1 - P. Papka A1 - J.F. Sharpey-Schafer A1 - B. A. Brown A1 - T.S. Dinoko A1 - E.A.M.A Khaleel A1 - E.A. Lawrie A1 - J.J. Lawrie A1 - K.C.W. Li A1 - S.N.T. Majola A1 - W.A. Richter A1 - O. Shirinda A1 - M.A. Stankiewicz A1 - P. Vymers A1 - M. Wiedeking VL - 50 UR - https://people.nscl.msu.edu/~brown/brown-all-papers/541-2014-epja50.158.pdf ER - TY - JOUR T1 - CLASH: The Enhanced Lensing Efficiency of the Highly Elongated Merging Cluster MACS J0416.1-2403 JF - The Astrophysical Journal Letters Y1 - 2013 A1 - Zitrin, A. A1 - Meneghetti, M A1 - Umetsu, K A1 - Broadhurst, T. A1 - Bartelmann, M A1 - Bouwens, R. A1 - Bradley, L A1 - Carrasco, M. A1 - Coe, D. A1 - Ford, H A1 - Kelson, D. A1 - Koekemoer, A. M A1 - Medezinski, E A1 - Moustakas, J. A1 - Moustakas, L. A. A1 - Nonino, M. A1 - Postman, M. A1 - Rosati, P. A1 - Seidel, G A1 - Seitz, S. A1 - Sendra, I A1 - Shu, X A1 - Vega, J A1 - Zheng, W KW - dark matter KW - galaxies: clusters: general KW - galaxies: clusters: individual: MACS J0416.1–2403 KW - Galaxies: High-Redshift KW - gravitational lensing: strong VL - 762 IS - 2 ER - TY - JOUR T1 - CLASH: The Enhanced Lensing Efficiency of the Highly Elongated Merging Cluster MACS J0416.1-2403 JF - The Astrophysical Journal Letters Y1 - 2013 A1 - Zitrin, A. A1 - Meneghetti, M A1 - Umetsu, K A1 - Broadhurst, T. A1 - Bartelmann, M A1 - Bouwens, R. A1 - Bradley, L A1 - Carrasco, M. A1 - Coe, D. A1 - Ford, H A1 - Kelson, D. A1 - Koekemoer, A. M A1 - Medezinski, E A1 - Moustakas, J. A1 - Moustakas, L. A. A1 - Nonino, M. A1 - Postman, M. A1 - Rosati, P. A1 - Seidel, G A1 - Seitz, S. 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A1 - Rosati, Piero KW - clusters KW - distances and redshifts KW - early universe KW - galaxies KW - individual VL - 762 ER - TY - JOUR T1 - CLASH: Three Strongly Lensed Images of a Candidate z~11 Galaxy JF - The Astrophysical Journal Y1 - 2013 A1 - Coe, Dan A1 - Zitrin, Adi A1 - Carrasco, Mauricio A1 - Shu, Xinwen A1 - Zheng, Wei A1 - Postman, Marc A1 - Bradley, Larry A1 - Koekemoer, Anton A1 - Bouwens, Rychard A1 - Broadhurst, Tom A1 - Monna, Anna A1 - Host, Ole A1 - Moustakas, Leonidas A A1 - Ford, Holland A1 - Moustakas, John A1 - van der Wel, Arjen A1 - Donahue, Megan A1 - Rodney, Steven A A1 - Benítez, Narciso A1 - Jouvel, Stephanie A1 - Seitz, Stella A1 - Kelson, Daniel D. A1 - Rosati, Piero KW - clusters KW - distances and redshifts KW - early universe KW - galaxies KW - individual VL - 762 IS - 1 ER - TY - JOUR T1 - CLASH: New Multiple Images Constraining the Inner Mass Profile of MACS J1206.2-0847 JF - The Astrophysical Journal Y1 - 2012 A1 - Zitrin, A. A1 - Rosati, P. 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KW - dark matter KW - galaxies: clusters: general KW - galaxies: clusters: individual: MACS J1206.2–0847 KW - Galaxies: High-Redshift KW - gravitational lensing: strong VL - 749 IS - 2 ER - TY - JOUR T1 - Expression profiling of Cucumis sativus in response to infection by Pseudoperonospora cubensis JF - PLoS ONE, in press Y1 - 2012 A1 - C. R. Buell A1 - Adhikari, B. A1 - Savory, E. A1 - Vaillancourt, B. A1 - Childs, K. L. A1 - Hamilton, J. P. A1 - B. Day ER - TY - JOUR T1 - A magnified young galaxy from about 500 million years after the Big Bang JF - Nature Y1 - 2012 A1 - Zheng, Wei A1 - Postman, Marc A1 - Zitrin, Adi A1 - Moustakas, John A1 - Shu, Xinwen A1 - Jouvel, Stephanie A1 - Høst, Ole A1 - Molino, Alberto A1 - Bradley, Larry A1 - Coe, Dan A1 - Moustakas, Leonidas A A1 - Carrasco, Mauricio A1 - Ford, Holland A1 - Benítez, Narciso A1 - Lauer, Tod R A1 - Seitz, Stella; B A1 - Bouwens, Rychard A1 - Koekemoer, Anton A1 - Medezinski, Elinor A1 - Bartelmann, Matthias A1 - Broadhurst, Tom A1 - Donahue, Megan A1 - Grillo, Claudio A1 - Infante, Leopoldo A1 - Jha, Saurabh W A1 - Kelson, Daniel D. A1 - Lahav, Ofer A1 - Lemze, Doron A1 - Melchior, Peter A1 - Meneghetti, Massimo A1 - Merten, Julian A1 - Nonino, Mario A1 - Ogaz, Sara A1 - Rosati, Piero A1 - Umetsu, Keiichi A1 - van der Wel, Arjen VL - 489 IS - 7416 ER - TY - JOUR T1 - mRNA-Seq analysis of the Pseudoperonospora cubensis transcriptome during cucumber (Cucumis sativus L.) infection JF - PLoS ONE, in press Y1 - 2012 A1 - Savory, E. A1 - Adhikari, B. A1 - Hamilton, J. P. A1 - Vaillancourt, B. A1 - C. R. Buell A1 - B. Day ER - TY - JOUR T1 - Signatures of minor mergers in Milky Way-like disc kinematics: Ringing revisited JF - ArXiv e-prints Y1 - 2011 A1 - Gómez, F. A. A1 - Minchev, I. A1 - Villalobos, Á. A1 - O'Shea, B. W. A1 - Williams, M. E. K. KW - Astrophysics - Galaxy Astrophysics ER - TY - JOUR T1 - Protecting the Amazon with Protected Areas JF - PNAS Y1 - 2009 A1 - Robert Walker A1 - Moore, Nathan A1 - Arima, Eugenio A1 - Perz, Stephen A1 - Simmons, Cynthia A1 - Caldas, Marcellus A1 - Vergara, Dante A1 - Bohrer, Claudio VL - 106 ER - TY - JOUR T1 - Scanning tunneling microscopy study of the CeTe3 charge density wave JF - Physical Review B Y1 - 2009 A1 - Tomic, A. A1 - Rak, Zs. A1 - Veazey, J. A1 - Malliakas, C. A1 - S. D. Mahanti A1 - Kanatzidis, M. A1 - Tessmer, S. VL - 79 IS - 8 ER - TY - JOUR T1 - The Destruction of Cosmological Minihalos by Primordial Supernovae JF - \apj Y1 - 2008 A1 - Whalen, D. J. A1 - van Veelen, B. A1 - O'Shea, B. W. A1 - Norman, M. L. KW - Cosmology: Early Universe KW - cosmology: theory KW - hydrodynamics KW - Stars: Early-Type KW - Stars: Supernovae: Individual VL - 682 ER - TY - CHAP T1 - Renormalized Coupled-Cluster Methods: Theoretical Foundations and Application to Potential Function of Water T2 - Progress in Theoretical Chemistry and Physics Y1 - 2007 A1 - Piotr Piecuch A1 - M. Wloch A1 - A.J.C. Verandas AB -Conventional single-reference methods fail when bond breaking and other situations characterized by larger non-dynamical correlation effects are examined. In consequence, the adequate treatment of molecular potential energy surfaces involving signiﬁcant bond rearrangements has been the domain of expert multi-reference methods. The question arises if one can develop practical single-reference procedures that could be applied to at least some of the most frequent multi-reference situations, such as single and double bond dissociations. This question is addressed in the present paper by examining the performance of the conventional and renormalized coupled-cluster (CC) methods in calculations of the potential enery surface of the water molecule. A comparison with the results of the highly accurate internally contracted multi-reference conﬁguration interaction calculations including the quasi-degenerate Davidson correction (MRCI(Q)) and the spectroscopically accurate potential energy surface of water resulting from the use of the energy switching (ES) approach indicates that the relatively inexpensive completely renormalized (CR) CC methods with singles (S), doubles (D), and a non-iterative treatment of triples (T) or triples and quadruples (TQ), such as CR-CCSD(T), CR-CCSD(TQ), and the recently developed rigorously size extensive extension of the CR-CCSD(T), termed CR-CC(2,3), provide considerable improvements in the results of conventional CCSD(T) and CCSD(TQ) calculations at larger internuclear separations. It is shown that the CR-CC(2,3) results a posteriori corrected for the effect of quadruply excited clusters (the CR-CC(2,3)+Q approach) can compete with the highly accurate MRCI(Q) data. The excellent agreement between the CR-CC(2,3)+Q and MRCI(Q) results suggests ways of improving the global potential energy surface of water resulting from the use of the ES approach in the regions of intermediate bond stretches and intermediate and higher energies connecting the region of the global minimum with the asymptotic regions. In addition to the examination of the performance of the CR-CCSD(T), CR-CCSD(TQ), CR-CC(2,3), and CR-CC(2,3)+Q approaches, we provide a thorough review of the method of moments of CC equations (MMCC), as applied to ground electronic states, including the most recent biorthogonal formulation of MMCC theory employing the left eigenstates of the similarity-transformed Hamiltonian, and other mathematical and physical concepts that lie behind all renormalized CC approximations. In particular, we discuss the similarities and differences between the older CR-CCSD(T) and CR-CCSD(TQ) approximations and the recently formulated size extensive renormalized CC methods, such as CR-CC(2,3), and open questions that emerge in the process of designing higher-order schemes based on the biorthogonalMMCC formalism, such as CR-CC(2,4), which describe the combined effect of triples (already present in CR-CC(2,3) calculations) and quadruples in a proper manner.

JF - Progress in Theoretical Chemistry and Physics VL - 16 IS - Part 1 ER - TY - JOUR T1 - Shape and Structure of N = Z 64Ge: Electromagnetic Transition Rates from the Application ￼of the Recoil Distance Method to a Knockout Reaction JF - PHYSICAL REVIEW LETTERS Y1 - 2007 A1 - K. Starosta A1 - A. Dewald A1 - A. Dunomes A1 - P. Adrich A1 - A.M. Amthor A1 - T. Baumann A1 - D. Bazin A1 - M. Bowen A1 - B. A. Brown A1 - A. Chester A1 - A. Gade A1 - D. Galaviz A1 - T. Glasmacher A1 - T. Ginter A1 - M. Hausmann A1 - M. Horoi A1 - J. Jolie A1 - B. Melon A1 - D. Miller A1 - V. Moeller A1 - R.P. Norris A1 - T. Pissulla A1 - M. Portillo A1 - W. Rother A1 - Y. Shimbara A1 - A. Stolz A1 - C. Vaman A1 - P. Voss A1 - D. Weisshaar A1 - V. Zelevinsky VL - 99 UR - http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.99.042503 ER - TY - JOUR T1 - Z = 0 Shell Gap near 100Sn from Intermediate-Energy Coulomb Excitations ￼in Even-Mass 106-112Sn Isotopes JF - PHYSICAL REVIEW LETTERS Y1 - 2007 A1 - C. Vaman A1 - C. Andreoiu A1 - D. Bazin A1 - A. Beccerril A1 - B. A. Brown A1 - C.M. Campbell A1 - A. Chester A1 - J.M. Cook A1 - D.C. Dinca A1 - A. Gade A1 - D. Galaviz A1 - T. Glasmacher A1 - M. {Hjorth-Jensen} A1 - M. Horoi A1 - D. Miller A1 - V. Moeller A1 - W. F. Mueller A1 - A. Schiller A1 - K. Starosta A1 - A. Stolz A1 - J.R. Terry A1 - A. Volya A1 - V. Zelevinsky A1 - H. Zwahlen VL - 99 UR - http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.99.162501 ER - TY - JOUR T1 - Extrapolating Potential Energy Surfaces by Scaling Electron Correlation at a Single Geometry JF - Chemical Physics Letters Y1 - 2006 A1 - A.J.C. Varandas A1 - Piotr Piecuch AB -It is shown that the molecular potential energy surface corresponding to a high level of ab initio theory can be accurately predicted by performing calculations with smaller basis sets and then scaling the electron correlation at a single point calculated with the larger target basis set.

VL - 430 IS - 4-6 ER - TY - JOUR T1 - Where Does the Planar-to-Nonplanar Turnover Occur in Small Gold Clusters JF - Journal of the American Chemical Society Y1 - 2005 A1 - Piotr Piecuch A1 - R.M. Olson A1 - S. Varganov A1 - M.S. Gordon A1 - S. Chretien A1 - H. Metiu A1 - K. Kowalski A1 - S. A. Kucharski A1 - M. Musial AB -Several levels of theory, including both Gaussian-based and plane wave density functional theory (DFT), second-order perturbation theory (MP2), and coupled cluster methods (CCSD(T)), are employed to study Au6 and Au8 clusters. All methods predict that the lowest energy isomer of Au6 is planar. For Au8, both DFT methods predict that the two lowest isomers are planar. In contrast, both MP2 and CCSD(T) predict the lowest Au8 isomers to be nonplanar.

VL - 127 IS - 3 ER -