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Title: THE INTERACTIONS OF POSITIVE K-MESONS WITH NUCLEI IN PHOTOGRAPHIC EMULSION AT ENERGIES IN THE REGION 0 + 130 Mev

Abstract

Some 148 m of K/sup +/ track have been followed in an unbiassed way and 109 inelastic interactions with emulsion nuclei found. In addition 3 K/sup +/- proton scattering events have been found and numerous cases of elastic scattering from emulsion nuclei. The differential cross-section for the elastic scattering has been plotted for three energy intervals and the results compared with those predicted by the optical model for various nuclear well depths. The variation of cross-section with energy for the inelastic events is found to be consistent with isotropy if the Pauli Exclusion Principle is taken into account and the best fit for the experimental points is obtained for a repulsive potential well of 20 Mev. The inelastic events have been analyzed on the basis of the statistical model of the nucleus and an attempt has also been made to obtain from the experimental data the angular distribution in the C.M. system of the Knucleon cross-section. On any reasonable assumption this appears to be peaked backwards. These data also demand a repulsive potential of ~20 Mev. The value of the average K-nucleon cross-section within nuclear matter for meson energies between 40 and 120 Mev is 4 mb/nucleon; allowing for themore » events forbidden by the exclusion principle this implies a cross-section of 6 mb on a free nucleon. Taking sigma /sub p/= (14 plus or minus 3) mb, it follows that sigma /sub n/= (2 plus or minus 2) mb. The ratio of charge exchange events to non-charge exchange events is .20 plus or minus .07---the value expected in the limit of a vanishingly small interaction in the T = 0 state. (auth)« less

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
H.H. Wills Physical Lab., Bristol; Univ. Coll., Dublin
OSTI Identifier:
4327760
NSA Number:
NSA-12-001555
Resource Type:
Journal Article
Journal Name:
Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B
Additional Journal Information:
Journal Volume: Vol: (10) 6; Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; ANGULAR DISTRIBUTION; BEAMS; CROSS SECTIONS; ELECTRIC CHARGES; ENERGY; ENERGY RANGE; INTERACTIONS; KAONS; MEASURED VALUES; MESONS; NUCLEAR EMULSIONS; NUCLEAR MODELS; NUCLEI; NUCLEONS; PARTICLE MODELS; PARTICLE TRACKS; PAULI PRINCIPLE; SCATTERING; TARGETS

Citation Formats

Bhowmik, B, Evans, D, Nilsson, S, Prowse, D J, Anderson, F, Keefe, D, Kernan, A, and Losty, J. THE INTERACTIONS OF POSITIVE K-MESONS WITH NUCLEI IN PHOTOGRAPHIC EMULSION AT ENERGIES IN THE REGION 0 + 130 Mev. Country unknown/Code not available: N. p., 1957. Web.
Bhowmik, B, Evans, D, Nilsson, S, Prowse, D J, Anderson, F, Keefe, D, Kernan, A, & Losty, J. THE INTERACTIONS OF POSITIVE K-MESONS WITH NUCLEI IN PHOTOGRAPHIC EMULSION AT ENERGIES IN THE REGION 0 + 130 Mev. Country unknown/Code not available.
Bhowmik, B, Evans, D, Nilsson, S, Prowse, D J, Anderson, F, Keefe, D, Kernan, A, and Losty, J. Sun . "THE INTERACTIONS OF POSITIVE K-MESONS WITH NUCLEI IN PHOTOGRAPHIC EMULSION AT ENERGIES IN THE REGION 0 + 130 Mev". Country unknown/Code not available.
@article{osti_4327760,
title = {THE INTERACTIONS OF POSITIVE K-MESONS WITH NUCLEI IN PHOTOGRAPHIC EMULSION AT ENERGIES IN THE REGION 0 + 130 Mev},
author = {Bhowmik, B and Evans, D and Nilsson, S and Prowse, D J and Anderson, F and Keefe, D and Kernan, A and Losty, J},
abstractNote = {Some 148 m of K/sup +/ track have been followed in an unbiassed way and 109 inelastic interactions with emulsion nuclei found. In addition 3 K/sup +/- proton scattering events have been found and numerous cases of elastic scattering from emulsion nuclei. The differential cross-section for the elastic scattering has been plotted for three energy intervals and the results compared with those predicted by the optical model for various nuclear well depths. The variation of cross-section with energy for the inelastic events is found to be consistent with isotropy if the Pauli Exclusion Principle is taken into account and the best fit for the experimental points is obtained for a repulsive potential well of 20 Mev. The inelastic events have been analyzed on the basis of the statistical model of the nucleus and an attempt has also been made to obtain from the experimental data the angular distribution in the C.M. system of the Knucleon cross-section. On any reasonable assumption this appears to be peaked backwards. These data also demand a repulsive potential of ~20 Mev. The value of the average K-nucleon cross-section within nuclear matter for meson energies between 40 and 120 Mev is 4 mb/nucleon; allowing for the events forbidden by the exclusion principle this implies a cross-section of 6 mb on a free nucleon. Taking sigma /sub p/= (14 plus or minus 3) mb, it follows that sigma /sub n/= (2 plus or minus 2) mb. The ratio of charge exchange events to non-charge exchange events is .20 plus or minus .07---the value expected in the limit of a vanishingly small interaction in the T = 0 state. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4327760}, journal = {Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B},
number = ,
volume = Vol: (10) 6,
place = {Country unknown/Code not available},
year = {1957},
month = {9}
}