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

28 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.

Funding

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.

Funders	Funder number
Sciencesa nd Engineering Re-searchC ouncil of Canada
National Science Foundation Arctic Social Science Program
U.S. Department of Energy EPSCoR

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",

month = mar,

day = "13",

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

language = "English",

volume = "395",

pages = "157--162",

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TY - JOUR

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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VL - 395

SP - 157

EP - 162

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -