Energy-dispersive x-ray diffraction for on-stream monitoring of m
British Experimental Physicist Seeking Research Position
1. Dr. Amir H. Sanjari
E-Mail: Physicist@nuradmp.com Mobile Telephone: +44 (0)750 886 2073
Profile
British Experimental Particle, Nuclear and Radiation Physics researcher and former
university lecturer with extensive experience in R&D, Devices, Instrumentation &
Measurement, Hardware / Software, Design, Monte-Carlo Simulation, Algorithmic
Modelling & Analysis, Scientific Project and Team Management.
Experience and skills attained in academia, international laboratories and industry.
Critical thinking, detail-oriented with global objectives in mind, pro-active.
Seeking a research related position.
Most Prominent Achievements
Research: Comment upon my major contribution to the award-winning (the UK
Rutherford Medal in Physics) discoveries in particle physics research:
' …“If Crystal Barrel uncovers convincing evidence for glueball states, Sanjari's work
[analysis, simulation, special trigger development] will have been of highest importance
in this.” The evidence is now to hand. Professor Bugg has been awarded the Rutherford
Medal … for his work…, including specifically these recent advances. Substantial credit
must go to Amir Sanjari whose careful analysis was of great importance in clarifying
alternative and sometimes conflicting interpretations of the data. ‘ [Letter of testimonial by
Prof. J. A. Edgington, Head, Physics Dept., QMUL, London, U.K., available upon request.]
Research Proposals and Grants: Successful track record of submission of proposals
and obtaining research funding. My work was instrumental in obtaining funding from the
government and private bodies for research in radiation interactions in various media.
Teaching & Training: Due to my initiative and pro-active efforts, I designed, setup
and managed (formerly NOMOS Corporation) a training course of exceptional standards
and quality in radiation physics for oncologists, physicists and dosimetrists which gained
accreditation by the relevant U.S. national professional bodies (CAMPEP AAMP &
AAMD). Such accreditation had never been bestowed on any commercial company.
Management
Management and coordination of, and active participation in, international Monte-Carlo
Simulation (U.S., CERN) groups, experiments and collaborations (small and large,
international) involving design, development and use of various software and hardware
systems resulting in innovative processes and discoveries. In addition to being the simulation
group coordinator at CERN, I was also the Stony Brook's liaison scientist there. Similarly,
later, I represented University of Notre Dame at the Brookhaven National Laboratory.
I, furthermore, coordinated and managed, during the experimental runs an international
HEP research collaboration (U.S.) consisting of approximately 60 scientists and technical
personnel. In addition, I was responsible for design and implementation of some innovative
ideas on the technical and management aspects of the experiment.
Also Chief of Radiation Physics Department consisting of physicists, et al..
2. CV for Dr. Amir H. Sanjari Page 2 of 5
Managing director of an Advanced Technologies Consultancy company with services in
various aspects of computing such as Information Systems (MIS) issues, Hardware, Software,
Internet, Networking, Training, Electronics, etc.
As carrying out research at the above laboratories involved working in radiation environment,
a deep understanding of the radiation health and safety issues and satisfying the relevant
criteria and standards at various laboratories were gained.
Research
Radiation Physicist (2001 – 2006)
Working in regulated radiation physics field with teams of scientists and technical personnel
in university and commercial (radiation devices company) environments.
Applying my extensive experience in Monte-Carlo simulation and R&D to design,
production and fault resolution of innovative radiation delivery, shielding, measurement
and diagnostic devices in conjunction with various linac delivery systems with Multi-Leaf
Collimators. I also had responsibility for problem-solving, System Calibration,
Measurement and Alignment, Quality Assurance, Intensity Modulated Radiation
Systems utilising, e.g., such data as from Chamber Dosimetry. Commissioning, validation,
performance and safety certification of devices in-situ and training of the client personnel
(physicists, et al.). Understanding performance, precision and safety issues of relevant
radiation systems. Also being pro-active in creating and setting up protocols for the optimum
operation, performance and quality assurance of the devices and systems in accordance with
the regulatory, efficiency, precision and other relevant criteria.
Also responsible for the management of the pertinent computer system.
Liaising extensively with clients and in-house technical groups to provide optimum solutions
by bringing to bear my scientific, technical, analytical, organisational and interpersonal skills.
Lecturer & Researcher in Experimental Radiation Physics (Research & Teaching)
Wayne State University, USA, (1999 – 2000)
Research in Electronic Portal Imaging Devices (EPIDs). Simulation (programs written and
implemented in C and FORTRAN on Unix systems), investigating radiation
deposition/detection and scattering. Having been one of the few participants in the successful
proposal for funding this research work involving simulating EPIDs (MCNP, etc) particle
interaction and energy deposition behaviour in various media for the purpose of
characterisation of dose/radiation deposition and distribution. I instigated the implementation
of a powerful simulation programme.
Researcher & Lecturer in Experimental Particle (sub-nuclear) Physics
University of Notre Dame, USA, (Research and Teaching) (1994 - 1996)
A key and active participant in the E852 experiment (π p → exotic meson states) carried out
at the Brookhaven National Laboratory’s AGS (Alternating Gradient Synchrotron), where I
was based for a period liaising with, and availing my previously gained experience in
spectroscopy to the collaboration. The aim of this experiment, which consisted of a forward
magnetic spectrometer, was to search for the possible existence of exotic, hybrid and
glueball states as predicted by the Quantum Chromo Dynamics.
My contributions included the responsibility of overseeing and ensuring the optimum
performance of the various neutral and charged particle detectors during the maiden three-
month run period of the experiment.
I was also the experimental run coordinator (see “Management”) with daily management of
the running of the experiment and collaborators including scientific and technical stuff.
3. CV for Dr. Amir H. Sanjari Page 3 of 5
The focus of efforts included Monte Carlo Simulation, software and analysis issues, with
the analysis topic of personal interest being E/i and f1(1420) particles.
In addition, I participated in the BaBar collaboration effort, on trigger mechanism issues, at
the SLAC (Stanford Linear Accelerator Center) B factory, as well as in the Radiative Phi
Decay experiment at the CEBAF (Continuous Electron Beam Accelerator facility, Jefferson
Lab.) where my experience in spectroscopy was applied.
Researcher (post-doctoral) in Experimental Particle (sub-nuclear) Physics
State University of New York Stony Brook, USA, (Research and Teaching) (1992 - 1994)
Involvement in research and development for the GEM detector at the Superconducting
Super Collider. As part of this effort, I was based at CERN where I took part in R&D, in
conjunction with the LHC, utilising a magnetic spectrometer carrying out such physics
programmes as punch-through measurement and radiation damage assessments to
determine suitability of various materials for particle detection by studying the energy
deposition and behaviour of various nuclear particles. I also coordinated the Monte-Carlo
simulation team (see “Management”) with the additional responsibility for developing the
relevant large-scale simulation and analysis programmes that incorporated such factors as
hardware components, their properties and performance as well as physics interaction
processes involved. I and others utilised these to study electromagnetic and hadronic
shower generation and penetration.
Researcher (post-doctoral) in Experimental Particle (sub-nuclear) Physics
Queen Mary University of London, UK, (Research and Teaching) (1988 – 1992)
My research consisted of work on the Crystal Barrel (PS197) experiment, which is a 4-π CsI
detector designed to study the proton - antiproton (pp̅ ) annihilation at the CERN LEAR,
utilising the beam from the CERN Proton Synchrotron (PS), with almost full charged and
neutral particle and radiation detection capability inside a superconducting magnet of ~
1.5 T (a magnetic spectrometer). As part of my various contributions to this international
collaboration I worked on the Slow Control system of the CsI detector (see computing).
One of the basic motivations for investigating p̅ p annihilation with full 4π detection, as in
this experiment, is Meson Spectroscopy by studying exclusive final states.
Of special interest was the possible production and decay of the hybrid M(1405) in the
reaction p̅ p → π M, where M decays into π η. Having written the necessary Monte-Carlo
simulation and analysis programmes, I embarked upon simulating and analysing the
preliminary data and the investigation of the trigger efficiency and performance, in
particular that of the p̅ p → π π η channel. This work contributed substantially to the
understanding of the special trigger mechanism that I utilised to take relevant data
efficiently for analysis.
This experimental group was instrumental in identifying the existence of glueballs and
absence of the hybrid M(1405).
As the most active member of the departmental physics group, the software, hardware and
analysis responsibilities rested with me for which my senior colleague was awarded the
Rutherford Medal by the UK Institute of Physics (see “Most Prominent Achievement”).
Ph.D. Research in Experimental Particle (sub-nuclear) Physics
Royal Holloway University of London, UK, (1983-1987)
I became involved in the running of the NA1 experiment, one of whose aims was to
investigate the photo-production of vector mesons.
This fixed target experiment, carried out at the CERN (European Centre for Nuclear
Research, in Geneva) SPS (Super Proton Synchrotron), consisted of a magnetic detector and
4. CV for Dr. Amir H. Sanjari Page 4 of 5
collected data at the photon beam energy range of 70 - 225 GeV with a novel active
germanium - silicon target. The detector comprised a series of Drift and Multi-Wire
Proportional Chambers, Magnets, Scintillators and Lead-glass counters. Responsibilities
included data-taking, detector maintenance, event reconstruction, off-line analysis and
simulation of the data.
M.Sc. Research in Nuclear, Particle & Reactor Physics
Bedford College University of London, UK, (1980-1982)
As part of my M.Sc. studies I carried out experiments in Nuclear Spectroscopy and Reactor
Physics at the University of London Reactor Centre. My dissertation involved tensor
calculations of particle production and decay in perturbative Quantum Chromo-Dynamics
pertaining to e+e- interactions and their comparison with the experimental results.
Computing (Software & Hardware) and Electronics
Contribution to off-line and on-line programmes for both the analysis of Particle, Nuclear,
Radiation Physics data and the simulation of their production/decay mechanisms as well as
that of detector / device performance in a variety of languages using appropriate
(customised & commercial) packages such as for data fitting, analysis and presentation.
Programming and system management (below) in the context of Simulation, Data-
acquisition and processing, Automation, Analysis, System Integration, Monitoring &
Control of various electronic systems and particle / radiation detectors, both on-line (real-
time) and off-line. Consultancy in many aspects of Computing, Training, Systems &
Technical Staff Management, Trouble- Shooting, Software & Hardware Systems
Implementation. Some of the systems utilised are:
Operating Systems: Unix (various flavours and platforms), Windows
Mainframes, Mini, Micro & IBM (VM/CMS) and Cray Super Computers, VAX
Embedded Systems Various OSs and customised Embedded Processors
Computing Languages: C - FORTRAN - REXX - HTML
Software & Internet Scientific, Commercial & Customised – Vectorisation,
Firmware Packages: Simulation, Analysis, Data-acquisition; Statistical
Analysis, Computer Algebra, Memory & Code
Management, Graphics, Databases, MS Office
Computing, Software: On - Line (Real-Time)
Contributions included on-line monitoring, data-acquisition and remote sensing of the
spectrometer components written in ‘C’ and implemented on VME systems run by the OS9
Operating System, which resided on customised VIP processor boards.
Electronics: VME based systems with generic and custom - built processors & various
other electronic modules. Design, construction, testing, trouble-shooting of particle
detectors / devices & spectrometers, and writing the associated remote-controlling, data-
acquisition and analysis software programs. Supervision, as the data-taking run coordinator,
of the whole spectrometer setup, fault-resolution, and dealing with the hardware performance
5. CV for Dr. Amir H. Sanjari Page 5 of 5
and repair issues, in particular those concerning the tracking and beam hodoscope systems
for which I was responsible.
Teaching / Training Experience and Philosophy
Amongst the subjects I am a-priori capable of teaching are: Physics (& Medical Physics)
Mathematics, Astronomy / Astrophysics (re: B.Sc. degree), Computing (software &
hardware). I, furthermore, have experience of pre-university levels teaching in the U. K.. I
have taught the above subjects, being in charge of the complete course design, preparing and
giving lectures, laboratory classes, tutorial and recitation and supervision. I have organised
and taught classes of varying sizes and seniority during my academic work at different
universities, in U.K. and U.S., for both physics - major and other interdisciplinary students.
I have also supervised graduate Ph.D. research students and been on the Instructional
Laboratory Committee overhauling and computerizing laboratory courses.
In addition to academic teaching, I have extensive experience in the industry and business
arena which has brought into focus the educational pre-requisites to better prepare
undergraduate and graduate students for their careers in industry and business.
Education & Employment
Lecturer in Physics and Mathematics – UK 2016-
Consultant Physicist – UK 2015-
Details available in due course 2006 - 2014
Chief of Radiation Physics- D’Amour Radiation Center, MA, US 2005 - 2006
Radiation Physicist- Radiation Physics Consultancy, MI, US 2004 - 2005
Radiation Physicist- NOMOS Corporation, PA, US 2001 - 2004
Lecturer- Indiana Institute of Technology, IN, US 2000 - 2001
Radiation Physics Researcher & Lecturer- Wayne State University, MI, US 1999 - 2000
Lecturer in Physics & Astronomy- Indiana University, IN, US 1996 - 1999
Lecturer & Researcher in Exptl. Particle Physics- Univ. of Notre Dame, IN, US 1994 - 1996
Researcher in Exptl. Particle Physics State Univ. of N.Y. Stony Brook, NY, US 1992 - 1994
Researcher in Exptl. Particle Physics- Queen Mary, Univ. of London, UK 1988 – 1992
Ph.D. Experimental Particle (sub-nuclear) Physics, University of London, U. K. 1983 - 1987
M.Sc. Nuclear, Particle & Reactor Physics, University of London, U. K. 1980 - 1982
B.Sc. Physics & Astronomy, University of London, U. K. 1977 – 1980
Professional Membership
Member, The Institute of Physics, UK (Current)
Chartered Physicist, The Institute of Physics, UK (app. 1988–1994, pending renewal)
Member, American Nuclear Society, USA (app. 1995–2005)
Member, American Association of Physicists in Medicine, USA (app. 2000–2007)
Current (clean) Enhanced DBS available.
Publications A list of scientific publications (50+) is available.
6. List of Publications
for: Dr. Amir H. Sanjari
(Conference proceedings and presentations are not included here)
(NB. Each experimental collaboration listed below included the undersigned as one of its active members and contributors)
( 1) λc Photoproduction & Lifetime Measurement
The NA1 Collaboration
Zeitschrift fur Physik C, Vol. 36, No. 4 (1987) 513
Also CERN pre-print CERN-EP / 87-139, 1987
( 2) A Measurement of D0
Lifetime
The NA1 Collaboration
Europhysics Letters, Vol. 5, No. 5 (1988) 407
Also CERN pre-print CERN-EP / 87-20, 1987
( 3) The Measurement of Neutral and Charged Particles with the Crystal Barrel Detector
at LEAR
The Crystal Barrel Collaboration
Nuclear Physics B (Proc. Suppl.), Vol. 8 (1989) 65
( 4) Spin Dependence of p p → n p π+
from 492 to 796 MeV
LAMPF, Physical Review C, Vol. 40, No. 5 (1989) 2203
( 5) Tensor Mesons in PP̅ Annihilations
The Crystal Barrel Collaboration
Nuclear Physics B (Proc. Suppl.), Vol. 21 (1991)
( 6) Observation of a 2++
Resonance at 1515 MeV in PP̅ Annihilations into 3π0
The Crystal Barrel Collaboration
Physics Letters B, Vol. 260 No. 1,2 (1991) 249
( 7) Recent results from the Crystal Barrel Experiment
The Crystal Barrel Collaboration
Soviet Journal of Nuclear Physics, Vol. 55 (1992) 767
Also CERN pre-print CERN-PPE / 91-188, October 1991
( 8) PP̅ Annihilation into ηηπ0
-- Observation of a Scalar Resonance Decaying into η η
The Crystal Barrel Collaboration
Physics Letters B, Vol. 291 (1992) 347
( 9) The Crystal Barrel Spectrometer at LEAR
The Crystal Barrel Collaboration
Nuclear Instruments and Methods, A321 (1992) 69
(10) The Pseudoscalar Mixing Angle ϴ(PS)
from η η' Production in p̅ p Annihilation at Rest
The Crystal Barrel Collaboration
Physics Letters B, Vol. 294 (1992) 451
7. Publication List for Dr. Amir H. Sanjari Page 2 of 5
(11) P--
versus S--
Wave pp̅ Annihilation at Rest in LH2
The Crystal Barrel Collaboration
Physics Letters B, Vol. 297 (1992) 214
(12) Meson Spectroscopy with the Crystal Barrel Detector at LEAR
Sanjari, A. H.
Invited Talk at the State University of New York at Stony Brook, New York
U.S.A., September 1992
(13) Measurements and Simulations of Muon Backgrounds and Muon Chamber
Performance for the GEM Experiment at the SSCL
Proposal to the Texas National Research Laboratory Commission, October 29, 1992
(14) P̅ P Annihilation at Rest into Two-body Final States
The Crystal Barrel Collaboration
Zeitschrift fur Physik C, Vol. 58, No. 2 (1993) 175
(15) GEM Technical Design Report
The GEM Collaboration
GEM-TN-93-262, April 1993
(16) P̅ P Annihilation at Rest into ω π0
π0
The Crystal Barrel Collaboration
Physics Letters B, Vol. 311 (1993) 362
Also, CERN pre-print CERN-PPE / 93-74, April 1993
(17) Radiative Protonium Annihilation into η η, γ π0
, γ η, γ ω and γ η'
The Crystal Barrel Collaboration
Physics Letters B, Vol. 311 (1993) 371
Also, CERN pre-print CERN-PPE / 93-103, May 1993
(18) Running Simulations for RD5
Sanjari A. H. and Lyndon C.
RD5 Technical Note TN93-12, September 1993
(19) Simulation Studies of Punch-through Measurements for CERN Experiment RD5
Sanjari A. H., Lyndon C., et al.
RD5 Technical Note TN93-13, September 1993
(20) a - Meson Spectroscopy with the Crystal Barrel Detector at LEAR
b - Research & Development for the GEM Experiment at the SSC
Sanjari, A. H.
Invited Talks at the University of Notre Dame, Indiana, U.S.A., September 1993
(21) a - Meson Spectroscopy at LEAR
b - Research & Development at CERN RD5
Sanjari, A. H.
Invited Talks at the University of Minnesota, Minnesota, U.S.A., October 1993
8. Publication List for Dr. Amir H. Sanjari Page 3 of 5
(22) Protonium Annihilation into K0L
K0S
π0
and K0L
K0S
η
The Crystal Barrel Collaboration
Physics Letters B, Vol. 319 (1993) 373
(23) New States as Observed by the Crystal Barrel Experiment
The Crystal Barrel Collaboration
Nuclear Physics A, Vol. 558 (1993) 3c
(24) P̅ P Annihilation at Rest into Two Mesons
The Crystal Barrel Collaboration
Nuclear Physics A, Vol. 558 (1993) 127c
(25) Final States with Strangeness from Crystal Barrel and Asterix
The Crystal Barrel Collaboration
Nuclear Physics A, Vol. 558 (1993) 269c
(26) Status Report of the RD5 Experiment
The RD5 Collaboration
CERN DRDC-93-49, January 1994
(27) Letter of Intent for the Study of CP Violation and Heavy Flavor Physics at PEP-II
The BaBar Collaboration
SLAC-0443, June 1994
(28) Observation of a Scalar Resonance Decaying to π+
π-
π0
π0
in P̅ P Annihilation at Rest
The Crystal Barrel Collaboration
Physics Letters B, Vol. 322 (1994) 431
(29) Observation of Two JPC
= 0++
Resonances at 1365 MeV and 1520 MeV
The Crystal Barrel Collaboration
Physics Letters B, Vol. 323 (1994) 233
(30) Study of P̅ P Annihilation at Rest into ω η π0
The Crystal Barrel Collaboration
Physics Letters B, Vol. 327 (1994) 425
(31) Search for a New Light Gauge Boson in Decays of π0
and η
The Crystal Barrel Collaboration
Physics Letters B, Vol. 333 (1994) 271 Also, CERN-PPE / 94-078, May 1994
(32) Physics with The Crystal Barrel: New Mesons in P̅ P Annihilation
The Crystal Barrel Collaboration
Phys. Atom. Nucl., Vol. 57 (1994) 1465 Also, Yad. Fiz. 57 (1994) 1542
(33) Search for Hybrids
The Crystal Barrel Collaboration
Phys. Atom. Nucl., Vol. 57 (1994) 1497 Also, Yad. Fiz. 57 (1994) 1572
(34) Pontecorvo Reactions in P̅ D Annihilations at Rest
The Crystal Barrel Collaboration
Phys. Atom. Nucl., Vol. 57 (1994) 1602 Also, Yad. Fiz. 57 (1994) 1672
9. Publication List for Dr. Amir H. Sanjari Page 4 of 5
(35) η Decay Branching Ratios
The Crystal Barrel Collaboration
Phys. At. Nucl., Vol. 57 (1994) 1711 Also, Yad. Fiz. 57 (1994) 1782
(36) Extension for E852
The E852 Collaboration
BNL-Proposal-852-ADD, October 1994
(37) Search for Exotic and Hybrid Mesons at Brookhaven National Laboratory
Sanjari, A. H.
Invited Talk at the University of Notre Dame, Indiana, U.S.A., November 1994
(38) New Results from Crystal Barrel
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 1815
(39) High Statistics Analysis of p̅ p → π0
π0
π0
at Rest
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 2227
(40) Hidden and Open s̅ s Production in p̅ p Annihilation at Rest
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 2235
(41) p̅ p Annihilation at Rest into K0L
K0S
π0
π0
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 2253
(42) P̅ P Annihilation in Flight
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 2305
(43) Partial Wave Analysis of ππη in p̅ p Annihilation at Rest
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 2321
(44) P̅ P Annihilation at Rest in Liquid Deuterium into π- π0
π0
P(S)
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 2339
(45) Test of Chiral Perturbation Theory in η Decays
The Crystal Barrel Collaboration
Nuovo Cimento, Vol. 107 A (1994) 2589
(46) Meson Spectroscopy at the Crystal Barrel Detector at CERN
Sanjari, A. H.
Invited Talk at the Rensselaer Polytechnic Institute, Troy, New York, May 1995
(47) BaBar Technical Design Report
The BaBar Collaboration - SLAC-R-95-0457, March 1995
10. Publication List for Dr. Amir H. Sanjari Page 5 of 5
(48) Measurement of Hadronic Shower Punch-through in Magnetic Field
The RD5 Collaboration
Zeitschrift fur Physik C, Vol. 69, (1996) 415
(49) Design and Performance of a Cesium Iodide Detector
The E852 Collaboration
Nuclear Instruments and Methods, Vol. A 368 (1996) 617
(50) Search for Exotic Mesons in π¯p Interactions at 18-GeV/c
E852 Collaboration
Prog. Part. Nucl. Phys. Vol. 36, (1996) 437 Also, hep-ex/9510004
(51) Measurement of Momentum and Angular Distribution of Punch-through Muons at the
RD5 Experiment
The RD5 Collaboration
Nuclear Instruments and Methods, Vol. A 386 (1997) 421
Also, CERN-PPE-95-195, August 1995
(52) A cylindrical drift chamber with azimuthal and axial position readout
E852 Collaboration
Nuclear Instruments and Methods, Vol. A386 (1997) 235-248
(53) A 3000 Element Lead Glass Electromagnetic Calorimeter
E852 Collaboration
Nuclear Instruments and Methods, Vol. A387 (1997) 377-394
(54) Evidence for Exotic Meson Production in the Reaction π¯ p → η π¯ p at 18-GeV/c
The E852 Collaboration
Phys. Rev. Lett. Vol. 79 (1997) 1630 Also, hep-ex/9705011
(55) Evidence for A New JPC
= 1-+
Exotic State in the Reaction pp̅ at 18-GeV/c
The E852 Collaboration
Phys. Rev. Lett. Vol. 81 (1998) 5760-5763
(56) Properties of the a0
(980) Meson
The E852 Collaboration
Phys. Rev. D59 (1999) 12001-12012
(57) Evidence for Exotic JPC
= 1-+
Meson Production in the Reaction π-
p → η π-
p
at 18 GeV/c
The E852 Collaboration
Phys. Rev. D60 (1999) 092001, 1-24
(58) Partial-wave analysis of the η π+
π-
system produced in the reaction π-
p → η π+ π-
n
at 18 GeV/c
The E852 Collaboration
Phys. Rev. D 62 (2000) 012003
1 Further details are available upon request.