Muon capture in 28Si and gp/ga

B. A. Moftah; E. Gete; D. F. Measday; D. S. Armstrong; J. Bauer; T. P. Gorringe; B. L. Johnson; B. Siebels; S. Stanislaus

doi:10.1016/S0370-2693(97)00081-6

Muon capture in ²⁸Si and g_p/g_a

B. A. Moftah, E. Gete, D. F. Measday, D. S. Armstrong, J. Bauer, T. P. Gorringe, B. L. Johnson, B. Siebels, S. Stanislaus

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Negative muon capture in ²⁸Si was used to determine the angular correlation between the neutrino and the 1229 keV γ-ray from the de-excitation of the 2201 keV 1⁺ level in ²⁸Al. To suppress backgrounds in the HPGe detectors, a coincidence was required with the 942 keV γ-ray in the de-excitation cascade detected in a NaI array. The extracted angular correlation coefficient a is 0.360 ± 0.059, consistent with previous measurements. Using a recent shell model calculation employing a full 1s-0d model space and the USD empirical interaction, this value of a implies a value for the induced pseudoscalar coupling of g_p/g_a = 0.0 ± 3.2, substantially smaller than the prediction of PCAC and pion-pole dominance.

Original language	English
Pages (from-to)	157-162
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	395
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(97)00081-6
State	Published - Mar 13 1997

Bibliographical note

Funding Information:
This experiment was conducted with the financial assistanceo f theN atural Sciencesa nd Engineering Re-searchC ouncil of Canada,t he National Science Foundation, USA, and the Department of Energy, USA, which are hereby gratefully acknowledged.

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/S0370-2693(97)00081-6

Cite this

@article{8b7f7f817de44d42bdd460e61b91968e,

title = "Muon capture in 28Si and gp/ga",

abstract = "Negative muon capture in 28Si was used to determine the angular correlation between the neutrino and the 1229 keV γ-ray from the de-excitation of the 2201 keV 1+ level in 28Al. To suppress backgrounds in the HPGe detectors, a coincidence was required with the 942 keV γ-ray in the de-excitation cascade detected in a NaI array. The extracted angular correlation coefficient a is 0.360 ± 0.059, consistent with previous measurements. Using a recent shell model calculation employing a full 1s-0d model space and the USD empirical interaction, this value of a implies a value for the induced pseudoscalar coupling of gp/ga = 0.0 ± 3.2, substantially smaller than the prediction of PCAC and pion-pole dominance.",

author = "Moftah, {B. A.} and E. Gete and Measday, {D. F.} and Armstrong, {D. S.} and J. Bauer and Gorringe, {T. P.} and Johnson, {B. L.} and B. Siebels and S. Stanislaus",

note = "Funding Information: This experiment was conducted with the financial assistanceo f theN atural Sciencesa nd Engineering Re-searchC ouncil of Canada,t he National Science Foundation, USA, and the Department of Energy, USA, which are hereby gratefully acknowledged.",

year = "1997",

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doi = "10.1016/S0370-2693(97)00081-6",

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volume = "395",

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T1 - Muon capture in 28Si and gp/ga

AU - Moftah, B. A.

AU - Gete, E.

AU - Measday, D. F.

AU - Armstrong, D. S.

AU - Bauer, J.

AU - Gorringe, T. P.

AU - Johnson, B. L.

AU - Siebels, B.

AU - Stanislaus, S.

N1 - Funding Information: This experiment was conducted with the financial assistanceo f theN atural Sciencesa nd Engineering Re-searchC ouncil of Canada,t he National Science Foundation, USA, and the Department of Energy, USA, which are hereby gratefully acknowledged.

PY - 1997/3/13

Y1 - 1997/3/13

N2 - Negative muon capture in 28Si was used to determine the angular correlation between the neutrino and the 1229 keV γ-ray from the de-excitation of the 2201 keV 1+ level in 28Al. To suppress backgrounds in the HPGe detectors, a coincidence was required with the 942 keV γ-ray in the de-excitation cascade detected in a NaI array. The extracted angular correlation coefficient a is 0.360 ± 0.059, consistent with previous measurements. Using a recent shell model calculation employing a full 1s-0d model space and the USD empirical interaction, this value of a implies a value for the induced pseudoscalar coupling of gp/ga = 0.0 ± 3.2, substantially smaller than the prediction of PCAC and pion-pole dominance.

AB - Negative muon capture in 28Si was used to determine the angular correlation between the neutrino and the 1229 keV γ-ray from the de-excitation of the 2201 keV 1+ level in 28Al. To suppress backgrounds in the HPGe detectors, a coincidence was required with the 942 keV γ-ray in the de-excitation cascade detected in a NaI array. The extracted angular correlation coefficient a is 0.360 ± 0.059, consistent with previous measurements. Using a recent shell model calculation employing a full 1s-0d model space and the USD empirical interaction, this value of a implies a value for the induced pseudoscalar coupling of gp/ga = 0.0 ± 3.2, substantially smaller than the prediction of PCAC and pion-pole dominance.

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