Oscar A. Rondon's Home Page
Principal Scientist
INPP - INSTITUTE OF NUCLEAR AND PARTICLE PHYSICS,
University
of Virginia.
A Very Brief "Introduction to Nucleon Spin Physics":
Nucleon structure as revealed by polarized lepton (electrons, muons,
neutrinos)
scattering on polarized nuclei.
Cartoon of a nucleon. Click here
to see more details
The quarks and gluons (= PARTONS) are confined inside the nucleon by
the strong force. This force binds the partons more strongly a low
energies
than at high energies. At very high energies the partons behave like
free
particles, without interactions (asymptotic freedom).
To view an indicator of how asymptotic freedom sets in, click on the
plot
of alphaS. The plot displays the strong coupling
constant
as function of Q, the momentum transferred from the incident
particle
to the target.
Oscar A. Rondon, co-spokesman
and proposal author.
SANE - Spin Asymmetries of the
Nucleon Experiment (JLab E07-003)
Oscar A. Rondon, co-spokesman and
contact.
RSS and SANE: Spin Physics in Hall C at JLab
(Talk at JLab's Workshop on Spin Structure at
Long Distance JLab, March 12 -13, 2009)
Nucleon
Structure
Studies with Polarized Photons and Nucleons
(Colloquium at UVA, April 7, 2006 -
Nuclear Seminar 3/21/2006)
Measuring g1p in 7Li
(Talk given at JLab
2000 Workshop on Physics
Opportunities
with 12 GeV Electrons,
JLAB, January 13-15, 2000, Session
I
- Hadrons in the Nuclear Medium)
https://www.jlab.org/div_dept/physics_division/GeV/workshops/12gev-hadrons.html
DIS 2001 , Bologna, Italy
Oscar A. Rondon, "The transverse spin structure of the nucleon
measured
in SLAC experiments E155/E155x, Presentation
in
HTML format.
Workshop
on
"Testing QCD through Spin Observables in Nuclear Targets",
Charlottesville, VA April 18-20, 2002
Oscar A. Rondon, "Effective Nucleon Polarization in Polarized Targets",
Abstract
in pdf format, Presentation
in HTML format
Corrections to Spin Structure Asymmetries Measured in Nuclear
Polarized
Targets
Oscar A. Rondon
(Published in Phys. Rev. C60:035201,1999 )
ABSTRACT
The nucleon spin structure functions have been extracted from
measurements
of asymmetries in deep inelastic scattering of polarized leptons
on polarized nuclei \cite{EMC,E142,E143,SMC,E154,hermes,E155}. The
polarized
nuclei present in practical targets: H, $^2$H, ^3$He, $^{14}$N,
$^{15}$N,
$^6$Li and $^7$Li, are, with the exception of hydrogen, systems of
bound
nucleons, some of which can attain significant degrees of alignment.
All
the aligned nucleons contribute to the asymmetries. The contributions
of
each nuclear species to the asymmetry have to be carefully determined,
before a reliable value for the net nucleon asymmetry is obtained. For
this purpose, the spin component of the nuclear angular momentum for
every
nuclear state and the probability of each state have to be known with
sufficient
accuracy. In this paper I discuss the basic corrections used to
estimate
the contributions of the different nuclei, with emphasis on the A = 6
and
7 Li isotopes present in the Li$^2$H polarized target used during SLAC
Experiment 155 to study the deuteron spin structure.
Full PostScript
text.
Density of ammonia (NH3) and deuterated
ammnonia (ND3) at cryogenic temperatures
Oscar A. Rondon
Density of ammonia at
low temperatures (pdf)
Ian Fisk's UVA 4th. year Physics project paper
Ammonia Density
Measurements (pdf)
The dilution factor for lithium deuteride target in SLAC E155.
This is a PostScript version of the (updated) transparencies on the
subject
presented at the E155 collaboration meeting at SLAC on 02/23/98:
pdf
version of LiD dilution factor
Neutron electric form factor GEn (JLab experiment E93-026)
GEn-related technical notes
Angular
dependence
of asymmetry
Sensitivity
of
asymmetry
to approximations
F.o.M.
for GEp
GEp,n by
absolute cross sections
Kinematics
summary
for
GEn
All
GEn runs database DBF IV format
Summary
of
hclog
entries on shielding for GEn Compressed PostScript:
Download and print.
(Can be viewed/printed directly with GSview 2.5 or later, available
from http://www.cs.wisc.edu/~ghost/gsview/)
Associated note on shielding configurations here
.
Neutron
Detector
Lead Shield
GEn TN # 2000-10
AedV for
all
combinations of beam and target polarizations
Nitrogen correction to asymmetries measured on ammonia
SLAC Experiment 155x: transverse nucleon spin
structure function
TN 2001-XX:
Asymmetries
in
e-nucleon
DIS Inclusive Polarized Scattering Including Electroweak
Interference.
LINKS
My e-mail address is: or@virginia.edu
This page was last updated 2/6/2013
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