High-precision half-life determination for the superallowed [beta][superscript +] emitter [superscript 62]Ga

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dc.creator Austin, Roby Anne Elizabeth, 1974-
dc.creator Grinyer, G. F.
dc.creator Finlay, P.
dc.creator Svensson, C. E.
dc.creator Ball, G. C.
dc.creator Leslie, J. R.
dc.creator Bandyopadhyay, D.
dc.creator Chaffey, A.
dc.creator Chakrawarthy, R. S.
dc.creator Garrett, P. E.
dc.date.accessioned 2015-03-09T17:25:55Z
dc.date.available 2015-03-09T17:25:55Z
dc.date.issued 2008-01
dc.identifier.issn 0556-2813
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/25976
dc.description Publisher's version/PDF en_CA
dc.description.abstract The half-life of the superallowed [beta][superscript +] emitter [superscript 62]Ga has been measured at TRIUMF’s Isotope Separator and Accelerator facility using a fast-tape-transport system and 4[pi] continuous-flow gas proportional counter to detect the positrons from the decay of [superscript 62]Ga to the daughter [superscript 62]Zn. The result, T[subscript 1/2] = 116.100 [plus or minus] 0.025 ms, represents the most precise measurement to date (0.022%) for any superallowed [beta]-decay half-life. When combined with six previous measurements of the [superscript 62]Ga half-life, a new world average of T[subscript 1/2] = 116.121 [plus or minus] 0.021 ms is obtained. This new half-life measurement results in a 20% improvement in the precision of the [superscript 62]Ga superallowed f t value while reducing its mean by 0.9[sigma] to f t = 3074.3(12) s. The impact of this half-life measurement on precision tests of the CVC hypothesis and isospin symmetry breaking corrections for A [greater than or equal to] 62 superallowed decays is discussed. en_CA
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dc.description.provenance Made available in DSpace on 2015-03-09T17:25:55Z (GMT). No. of bitstreams: 1 Austin_Roby_AE_article_2008.pdf: 294100 bytes, checksum: ae1c0685139bc061f81477e95b12f211 (MD5) Previous issue date: 2008 en
dc.language.iso en en_CA
dc.publisher American Physical Society en_CA
dc.relation.uri http://dx.doi.org/10.1103/PhysRevC.77.015501
dc.rights Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
dc.subject.lcsh Half-life (Nuclear physics)
dc.subject.lcsh Beta decay
dc.subject.lcsh Gallium -- Isotopes
dc.subject.lcsh Isobaric spin
dc.title High-precision half-life determination for the superallowed [beta][superscript +] emitter [superscript 62]Ga en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Physical Review C 77(1), 015501. (2008) en_CA
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Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
 
Published Version: http://dx.doi.org/10.1103/PhysRevC.77.015501
 
 

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