Publications (25)
Double wells, scalar fields and quantum phase transitions in ions traps
A. Retzker, R. Thompson, D. Segal +1
Since Hund's work on the ammonia molecule, the double well potential has formed a key paradigm in physics. Its importance is further underlined by the central role it plays in the…
Mass Measurements of Neutron-Rich Gallium Isotopes Refine Production of Nuclei of the First r-Process Abundance Peak in Neutron Star Merger Calculations
M. P. Reiter, S. Ayet San Andrés, S. Nikas +33
We report mass measurements of neutron-rich Ga isotopes Ga with TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The measurements determine the masses of $^{80-8…
Emission-Line Galaxies from the NICMOS/HST GRISM Parallel Survey
P. J. McCarthy, L. Yan, W. Freudling +10
We present the first results of a survey of random fields with the slitless G141 () grism on NICMOS. Approximately 64 square arcminutes have been observed…
Spectral modeling of scintillator for the NEMO-3 and SuperNEMO detectors
J. Argyriades, R. Arnold, C. Augier +90
We have constructed a GEANT4-based detailed software model of photon transport in plastic scintillator blocks and have used it to study the NEMO-3 and SuperNEMO calorimeters employ…
The Minimum Halo Mass for Star Formation at z = 6 - 8
K. Finlator, M. K. M. Prescott, B. D. Oppenheimer +6
Recent analysis of strongly-lensed sources in the Hubble Frontier Fields indicates that the rest-frame UV luminosity function of galaxies at 6--8 rises as a power law down to $…
Interferometer Observations of Subparsec-scale Infrared Emission in the Nucleus of NGC 4151
M. Swain, G. Vasisht, R. Akeson +22
We report novel, high-angular resolution interferometric measurements that imply the near-infrared nuclear emission in NGC 4151 is unexpectedly compact. We have observed the nucleu…
The e p -> e' p eta reaction at and above the S11(1535) baryon resonance
The CLAS Collaboration, R. Thompson
New cross sections for the reaction e p -> ep eta are reported for total center of mass energy W = 1.5--1.86 GeV and invariant momentum transfer Q^2 = 0.25--1.5 GeV^2. This large k…
Keck Interferometer Observations of FU Orionis Objects
R. Millan-Gabet, J. D. Monnier, R. L. Akeson +31
We present new K-band long baseline interferometer observations of three young stellar objects of the FU Orionis class, V1057 Cyg, V1515 Cyg and Z CMa-SE, obtained at the Keck Inte…
Ultraviolet and Multiwavelength Variability of the Blazar 3C 279: Evidence for Thermal Emission
E. Pian, C. M. Urry, L. Maraschi +13
The gamma-ray blazar 3C 279 was monitored on a nearly daily basis with IUE, ROSAT and EGRET for three weeks between December 1992 and January 1993. During this period, the blazar w…
Exploring the Onset of Collectivity Approaching N=40 through Manganese Masses
C. Chambers, M. P. Reiter, A. T. Gallant +24
Isotopes in the region of the nuclear chart below have been the subject of intense experimental and theoretical effort due to the potential onset of a new ``isla…
High Mass, OB Star Formation in M51 : HST Halpha and Palpha Imaging
N. Z. Scoville, M. Polletta, S. Ewald +3
(first paragraph) We have obtained Halpha and Palpha emission line images covering the central 3 - 4 arcmin of M51 using the WFPC2 and NICMOS cameras on HST to study the high-mass…
The near-infrared size-luminosity relations for Herbig Ae/Be disks
J. D. Monnier, R. Millan-Gabet, R. Billmeier +31
We report the results of a sensitive K-band survey of Herbig Ae/Be disk sizes using the 85-m baseline Keck Interferometer. Targets were chosen to span the maximum range of stellar…
Integral field spectroscopy in the near infrared of NGC 3125-A and SBS 0335-052
L. Vanzi, G. Cresci, M. Sauvage +1
We present integral field spectroscopy in the near infrared of the nearby dwarf starburst galaxies NGC 3125-A and of the low metallicity dwarf galaxy SBS 0335-052. The use of adapt…
Collision-Induced Dissociation at TRIUMF's Ion Trap for Atomic and Nuclear science
A. Jacobs, C. Andreoiu, J. Bergmann +26
The performance of high-precision mass spectrometry of radioactive isotopes can often be hindered by large amounts of contamination, including molecular species, stemming from the…
High-resolution Near-Infrared Images and Models of the Circumstellar Disk in HH 30
A. S. Cotera, B. A. Whitney, E. Young +6
We present Hubble Space Telescope (HST) Near-Infrared Camera and Multi-object Spectrometer (NICMOS) observations of the reflection nebulosity associated with the T Tauri star HH 30…
Test Beam Results of 3D Silicon Pixel Sensors for the ATLAS upgrade
ATLAS 3D Collaboration, P. Grenier, G. Alimonti +90
Results on beam tests of 3D silicon pixel sensors aimed at the ATLAS Insertable-B-Layer and High Luminosity LHC (HL-LHC)) upgrades are presented. Measurements include charge collec…
Dawning of the N=32 shell closure seen through precision mass measurements of neutron-rich titanium isotopes
E. Leistenschneider, M. P. Reiter, S. Ayet San Andrés +42
A precision mass investigation of the neutron-rich titanium isotopes Ti was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range of the measur…
NICMOS Imaging of the Nuclei of Arp 220
N. Z. Scoville, A. S. Evans, N. Dinshaw +8
We report high resolution imaging of the ultraluminous infrared galaxy Arp 220 at 1.1, 1.6, and 2.22 microns with NICMOS on the HST. The diffraction-limited images at 0.1--0.2 arcs…
The Soft, Fluctuating UVB at as Traced by C IV, SiIV, and CII
K. Finlator, B. D. Oppenheimer, R. Davé +3
The sources that drove cosmological reionization left clues regarding their identity in the slope and inhomogeneity of the ultraviolet ionizing background (UVB): Bright quasars (QS…
A new variable for SRS plan quality evaluation based on normal tissue sparing: The Effect of Prescription Isodose Levels
Q. Zhang, D. Zheng, Y. Lei +10
Objectives: A new dosimetric variable, dose dropping speed (DDS), was proposed and used to evaluate normal tissue sparing among stereotactic radiosurgery (SRS) plans with different…
The FP420 R&D Project: Higgs and New Physics with forward protons at the LHC
M. G. Albrow, R. B. Appleby, M. Arneodo +95
We present the FP420 R&D project, which has been studying the key aspects of the development and installation of a silicon tracker and fast-timing detectors in the LHC tunnel at 42…
The Reionization of Carbon
K. Finlator, R. Thompson, S. Huang +3
Observations suggest that CII was more abundant than CIV in the intergalactic medium towards the end of the hydrogen reionization epoch. This transition provides a unique opportuni…
NICMOS Imaging of Infrared-Luminous Galaxies
N. Z. Scoville, A. S Evans, R. Thompson +6
We present near-infrared images obtained with the HST NICMOS camera for a sample of 9 luminous (LIGs: L_IR (8-1000 microns) >~ 10^11 L_sun) and 15 ultra-luminous (ULIGS: L_IR >~ 10…
SIGAME simulations of the [CII], [OI] and [OIII] line emission from star forming galaxies at z ~ 6
K. P. Olsen, T. R. Greve, D. Narayanan +4
Of the almost 40 star forming galaxies at z>~5 (not counting QSOs) observed in [CII] to date, nearly half are either very faint in [CII], or not detected at all, and fall well belo…
Precision mass measurements of magnesium isotopes and implications on the validity of the Isobaric Mass Multiplet Equation
M. Brodeur, A. A. Kwiatkowski, O. M. Drozdowski +21
If the mass excess of neutron-deficient nuclei and their neutron-rich mirror partners are both known, it can be shown that deviations of the Isobaric Mass Multiplet Equation (IMME)…