Photon asymmetry measurement in radiative muon capture on calcium-40
A photon asymmetry measurement in radiative muon capture (RMC) on ⁴⁰Ca has been carried out in order to determine a value for the induced-pseudoscalar coupling constant (ցƿ), thereby allowing us to investigate the possible renormalisation effect for this coupling constant inside nuclear matter. Neg...
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ndltd-UBC-oai-circle.library.ubc.ca-2429-265152018-01-05T17:43:41Z Photon asymmetry measurement in radiative muon capture on calcium-40 Pouladdej, Ali Muons Weak interactions (Nuclear physics) A photon asymmetry measurement in radiative muon capture (RMC) on ⁴⁰Ca has been carried out in order to determine a value for the induced-pseudoscalar coupling constant (ցƿ), thereby allowing us to investigate the possible renormalisation effect for this coupling constant inside nuclear matter. Negative muons from the M20A channel at TRIUMF were stopped in a ⁴⁰Ca target. The resulting RMC photons were then converted by a 5 cm thick Nal converter placed immediately in front of our main detector, a Nal crystal of size 46 cm∅x51 cm. The purpose of the converter was to provide discrimination against the prolific high energy neutron background. From a fit to our time spectrum for the high-energy (57 MeV< E⋎ <95 MeV) photons, we were able to extract a value for the RMC photon asymmetry (⍺⋎). This time spectrum, with 5200 "clean" photons and a signal to noise ratio of ~7, showed the photon asymmetry quite clearly. With our measured value for the photon asymmetry: ⍺⋎ = 1.00±0.23, the predicted value of the induced-pseudoscalar coupling constant becomes: ցƿ = (0.0±⁸‧⁰₆․₇) ցA;, this range contains the (theoretical) unrenormalised value of Goldberger-Treiman: ցƿ ≈ 7 ցA⋅ Science, Faculty of Physics and Astronomy, Department of Graduate 2010-07-16T00:45:50Z 2010-07-16T00:45:50Z 1987 Text Thesis/Dissertation http://hdl.handle.net/2429/26515 eng For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. University of British Columbia |
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English |
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Muons Weak interactions (Nuclear physics) |
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Muons Weak interactions (Nuclear physics) Pouladdej, Ali Photon asymmetry measurement in radiative muon capture on calcium-40 |
description |
A photon asymmetry measurement in radiative muon capture (RMC) on ⁴⁰Ca has been carried out in order to determine a value for the induced-pseudoscalar coupling constant (ցƿ), thereby allowing us to investigate the possible renormalisation effect for this coupling constant inside nuclear matter.
Negative muons from the M20A channel at TRIUMF were stopped in a ⁴⁰Ca target. The resulting RMC photons were then converted by a 5 cm thick Nal converter placed immediately in front of our main detector, a Nal crystal of size 46 cm∅x51 cm. The purpose of the converter was to provide discrimination against the prolific high energy neutron background.
From a fit to our time spectrum for the high-energy (57 MeV< E⋎ <95 MeV) photons, we were able to extract a value for the RMC photon asymmetry (⍺⋎). This time spectrum, with 5200 "clean" photons and a signal to noise ratio of ~7, showed the photon asymmetry quite clearly.
With our measured value for the photon asymmetry: ⍺⋎ = 1.00±0.23, the predicted value of the induced-pseudoscalar coupling constant becomes: ցƿ = (0.0±⁸‧⁰₆․₇) ցA;, this range contains the (theoretical) unrenormalised value of Goldberger-Treiman: ցƿ ≈ 7 ցA⋅ === Science, Faculty of === Physics and Astronomy, Department of === Graduate |
author |
Pouladdej, Ali |
author_facet |
Pouladdej, Ali |
author_sort |
Pouladdej, Ali |
title |
Photon asymmetry measurement in radiative muon capture on calcium-40 |
title_short |
Photon asymmetry measurement in radiative muon capture on calcium-40 |
title_full |
Photon asymmetry measurement in radiative muon capture on calcium-40 |
title_fullStr |
Photon asymmetry measurement in radiative muon capture on calcium-40 |
title_full_unstemmed |
Photon asymmetry measurement in radiative muon capture on calcium-40 |
title_sort |
photon asymmetry measurement in radiative muon capture on calcium-40 |
publisher |
University of British Columbia |
publishDate |
2010 |
url |
http://hdl.handle.net/2429/26515 |
work_keys_str_mv |
AT pouladdejali photonasymmetrymeasurementinradiativemuoncaptureoncalcium40 |
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1718593113235128320 |