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Title: LARGE-ANGLE ELASTIC SCATTERING OF NEGATIVE PIONS BY PROTONS AT 1.51, 2.01, AND 2.53 Bev/C

Abstract

The differential elastic scattering cross sections for negative pions on protons were measured at incident momenta of 1.51, 2.01, and 2.53 Bev/c with emphasis on the angular region outside the diffraction peak. The purpose of the experiment was to examine the behavior of the largeangle differential elastic cross section as a function of energy from the energy of the highest known resonance in the pion-nucleon system into the region where the total. cross sections appear to be approaching an asymptotic value. The experiment was performed at the Bevatron, using a luminescent chamber system to photograph the tracks of the scattered pion and the recoil proton from a liquid hydrogen target. A total of 2412 elastic scatterings were analyzed at 1.51 Bev/c, 1300 events at 2.01 Bev/c, and 1080 events at 2.53 Bev/c. From the existing data it may be noted that the backward bump, which has a maximum height of 2.1 mb/sr at 900 Mev and 1.1 mb/sr at 1020 Mev, is down to 0.4 mb/sr at 1.51 Bev/c (1.37 Bev), and is not present at 2.01 or 2.53 Bev/c. The angular distributions behind the diffraction peak at 2.01 and 2.53 Bev/c are rougly constant, decreasing from 0.18 mb/sr atmore » 2.01 Bev/c to 0.125 mb/sr at 2.53 Bev/c. Although the data can be taken to suggest some oscillatory structure in this region, they are not inconsistent with an isotropic distribution that might be interpreted as evidence for an S- wave scattering behind the diffraction peak. (Dissertation Abstr.)« less

Authors:
Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4635599
NSA Number:
NSA-17-037990
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis. Orig. Receipt Date: 31-DEC-63
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; ANGULAR DISTRIBUTION; BETATRONS; CONFIGURATION; CROSS SECTIONS; DIFFRACTION; ENERGY; HYDROGEN; LIQUIDS; LUMINESCENCE; MEASURED VALUES; MOMENTUM; NUCLEONS; OSCILLATIONS; PARTICLE TRACKS; PHOTOGRAPHY; PIONS; PROTONS; RECOILS; RESONANCE; S-WAVE; SCATTERING; TARGETS

Citation Formats

Lai, K W. LARGE-ANGLE ELASTIC SCATTERING OF NEGATIVE PIONS BY PROTONS AT 1.51, 2.01, AND 2.53 Bev/C. Country unknown/Code not available: N. p., 1963. Web.
Lai, K W. LARGE-ANGLE ELASTIC SCATTERING OF NEGATIVE PIONS BY PROTONS AT 1.51, 2.01, AND 2.53 Bev/C. Country unknown/Code not available.
Lai, K W. Tue . "LARGE-ANGLE ELASTIC SCATTERING OF NEGATIVE PIONS BY PROTONS AT 1.51, 2.01, AND 2.53 Bev/C". Country unknown/Code not available.
@article{osti_4635599,
title = {LARGE-ANGLE ELASTIC SCATTERING OF NEGATIVE PIONS BY PROTONS AT 1.51, 2.01, AND 2.53 Bev/C},
author = {Lai, K W},
abstractNote = {The differential elastic scattering cross sections for negative pions on protons were measured at incident momenta of 1.51, 2.01, and 2.53 Bev/c with emphasis on the angular region outside the diffraction peak. The purpose of the experiment was to examine the behavior of the largeangle differential elastic cross section as a function of energy from the energy of the highest known resonance in the pion-nucleon system into the region where the total. cross sections appear to be approaching an asymptotic value. The experiment was performed at the Bevatron, using a luminescent chamber system to photograph the tracks of the scattered pion and the recoil proton from a liquid hydrogen target. A total of 2412 elastic scatterings were analyzed at 1.51 Bev/c, 1300 events at 2.01 Bev/c, and 1080 events at 2.53 Bev/c. From the existing data it may be noted that the backward bump, which has a maximum height of 2.1 mb/sr at 900 Mev and 1.1 mb/sr at 1020 Mev, is down to 0.4 mb/sr at 1.51 Bev/c (1.37 Bev), and is not present at 2.01 or 2.53 Bev/c. The angular distributions behind the diffraction peak at 2.01 and 2.53 Bev/c are rougly constant, decreasing from 0.18 mb/sr at 2.01 Bev/c to 0.125 mb/sr at 2.53 Bev/c. Although the data can be taken to suggest some oscillatory structure in this region, they are not inconsistent with an isotropic distribution that might be interpreted as evidence for an S- wave scattering behind the diffraction peak. (Dissertation Abstr.)},
doi = {},
journal = {},
number = ,
volume = ,
place = {Country unknown/Code not available},
year = {1963},
month = {1}
}

Thesis/Dissertation:
Other availability
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