231 citations · 1.2k across the 50 of their papers we have counts for
51 papers
A New Low Measurement of the Proton's Spin Structure Function from Longitudinal & Transverse Polarized Data
D. Ruth, R. Zielinski, C. Gu +94
The proton's spin structure has proven to be far more complicated than was originally believed, and has been the subject of a number of experimental investigations. %Early measurem…
Compact sub-10 ps Resolution Radio Frequency Photomultiplier Tube
Sergey Abrahamyan, Simon Zhamkochyan, Hasmik Rostomyan +16
Experimental measurements of the radial spreading of photoelectrons emitted from a multi-alkali photocathode in a MCP-based photomultiplier tube have shown that, for photon wavelen…
A Helical-Deflector-Based Radio-Frequency Spiral Scanning System for keV Energy Electrons
Simon Zhamkochyan, Vanik Kakoyan, Vardan Bardakhchyan +21
We present the design, modeling, and experimental validation of a radio-frequency based time-to-position conversion system for keV electrons incorporating a helical deflector opera…
Picosecond Precision Heavy-Ion Detector for Λ Hypernuclei Lifetime Studies
Simon Zhamkochyan, Sergey Abrahamyan, Amur Margaryan +18
In this paper, we present the design and preliminary performance evaluation of a new heavy-ion detector for direct measurements of heavy Λ hypernuclei lifetime. The detector employ…
Picosecond resolution photoelectron emission lifetime detection system
V. Kakoyan, S. Zhamkochyan, S. Abrahamyan +21
This paper describes a new photoelectron emission lifetime detection system. It is based on a recently developed Radio Frequency Timing technique of keV electrons and a 40 MHz, ult…
Measuring short-range correlations and quasi-elastic cross sections in A(e,e') at x>1 and modest Q
Y. P. Zhang, Z. H. Ye, D. Nguyen +96
We present results from the Jefferson Lab E08-014 experiment, investigating short-range correlations (SRC) through measurements of inclusive quasi-elastic scattering from H, $^…
Advanced Radio Frequency Timing AppaRATus (ARARAT) Technique and Applications
Ani Aprahamian, Amur Margaryan, Vanik Kakoyan +28
The development of the advanced Radio Frequency Timer of electrons is described. It is based on a helical deflector, which performs circular or elliptical sweeps of keV electrons,…
Technique for the measurement of intrinsic pulse-shape discrimination for organic scintillators using tagged neutrons
N. Mauritzson, K. G. Fissum, J. R. M. Annand +10
Fast-neutron/gamma-ray pulse-shape discrimination has been performed for the organic liquid scintillators NE 213A and EJ 305 using a time-of-flight based neutron-tagging technique…
The Proton Spin Structure Function and Generalized Polarizabilities in the Strong QCD Regime
D. Ruth, R. Zielinski, C. Gu +94
The strong interaction is not well understood at low energy, or for interactions with low momentum transfer , but one of the clearest insights we have comes from Chiral Pertur…
An RF Timer of Electrons and Photons with the Potential to reach Picosecond Precision
Amur Margaryan, Vanik Kakoyan, Simon Zhamkochyan +17
This paper describes a new radio frequency timer of keV energy electrons. It is based on a helical deflector, which performs circular or elliptical sweeps of keV electrons, by mean…
Geant4-based calibration of an organic liquid scintillator
N. Mauritzson, K. G. Fissum, H. Perrey +8
A light-yield calibration of an NE 213A organic liquid scintillator detector has been performed using both monoenergetic and polyenergetic gamma-ray sources. Scintillation light wa…
International Workshop on Next Generation Gamma-Ray Source
C. R. Howell, M. W. Ahmed, A. Afanasev +50
A workshop on The Next Generation Gamma-Ray Sources sponsored by the Office of Nuclear Physics at the Department of Energy, was held November 17--19, 2016 in Bethesda, Maryland. Th…
Novel observation of isospin structure of short-range correlations in calcium isotopes
D. Nguyen, Z. Ye, P. Aguilera +101
Short Range Correlations (SRCs) have been identified as being responsible for the high momentum tail of the nucleon momentum distribution, n(k). Hard, short-range interactions of n…
Measurement of neutron and proton analyzing powers on , , and targets in the momentum region 3-4.2 GeV/c
S. N. Basilev, Yu. P. Bushuev, O. P. Gavrishchuk +28
The analyzing powers for proton elastic scattering () and neutron charge exchange () reactions on nuclei have been measured on , , a…
Measurement of the single-spin asymmetry in quasi-elastic He() scattering at GeV
E. Long, Y. W. Zhang, M. Mihoviloviv +88
Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either H or He targets. In order to extract…
Probing for high momentum protons in He via the reaction
S. Iqbal, F. Benmokhtar, M. Ivanov +107
Experimental cross sections for the reaction up to a missing momentum of 0.632 GeV/ at and =2(GeV/) are reported. The data are compared to…
Decay pion spectroscopy: a new approach
A. Margaryan, R. Ajvazyan, N. Grigoryan +12
We propose a new experiment for decay pion spectroscopy of light hypernuclei at electron- and proton-beam facilities, using the recoil distance technique for separation of produced…
Near-threshold photoproduction on the deuteron
B. Strandberg, K. G. Fissum, J. R. M. Annand +29
The first experimental investigation of the near-threshold cross section for incoherent photoproduction on the deuteron d -> pp is presented. The experimental techn…
Measurement of double-polarization asymmetries in the quasi-elastic process
M. Mihovilovič, G. Jin, E. Long +99
We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of proceeding to and final states, pe…
Compton Scattering from the Deuteron above Pion-Production Threshold
B. Strandberg, J. R. M. Annand, W. Briscoe +26
The electromagnetic polarizabilities of the nucleon are fundamental nucleon-structure observables that characterize its response to external electromagnetic fields. The neutron pol…
Search for three-nucleon short-range correlations in light nuclei
Z. Ye, P. Solvignon, D. Nguyen +100
We present new data probing short-range correlations (SRCs) in nuclei through the measurement of electron scattering off high-momentum nucleons in nuclei. The inclusive 4He/3He cro…
Tagging fast neutrons from a 252Cf fission-fragment source
Julius Scherzinger, Ramsey Al Jebali, John Annand +6
Coincidence and time-of-flight measurement techniques are employed to tag fission neutrons emitted from a 252Cf source sealed on one side with a very thin layer of Au. The source i…
First measurement of unpolarized SIDIS cross section and cross section ratios from a He target
X. Yan, K. Allada, K. Aniol +114
The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in He() have been measured for the first time in Jefferson…
A comparison of untagged gamma-ray and tagged-neutron yields from 241AmBe and 238PuBe sources
Julius Scherzinger, Ramsey Al Jebali, John Annand +7
Untagged gamma-ray and tagged-neutron yields from 241AmBe and 238PuBe mixed-field sources have been measured. Gamma-ray spectroscopy measurements from 1 - 5 MeV were performed in a…