Large difference between two methods of calculating the integrated fermi function in superallowed β-decays
The integrated statistical rates for superallowed 0+-0+ β-transitions evaluated according to the most widely used methods proposed by Behrens-Jänecke-Bühring and Towner-Hardy are compared. It is shown that both calculations are in essential agreement up to mass A=38. However, for heavier nuclei ther...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v122_n2_p131_Szybisz |
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todo:paper_03702693_v122_n2_p131_Szybisz2023-10-03T15:28:39Z Large difference between two methods of calculating the integrated fermi function in superallowed β-decays Szybisz, L. Silbergleit, V.M. Sidelnik, J.I. The integrated statistical rates for superallowed 0+-0+ β-transitions evaluated according to the most widely used methods proposed by Behrens-Jänecke-Bühring and Towner-Hardy are compared. It is shown that both calculations are in essential agreement up to mass A=38. However, for heavier nuclei there is a discrepancy. The disagreement, which increases with increasing Z, ranges from 0.07% for 42Sc to as much as 0.13% for 54Co and is larger than the errors attached to f-values due to uncertainties in W0 (these being about 0.03-0.04%). Moreover, such differences are either comparable to or even larger than the uncertainties in t and δc. The disagreement is attributed to the different evaluations of the second-forbidden nuclear matrix elements. The choice of the parameters used in both methods is also discussed. © 1983. Fil:Szybisz, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Silbergleit, V.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sidelnik, J.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v122_n2_p131_Szybisz |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
The integrated statistical rates for superallowed 0+-0+ β-transitions evaluated according to the most widely used methods proposed by Behrens-Jänecke-Bühring and Towner-Hardy are compared. It is shown that both calculations are in essential agreement up to mass A=38. However, for heavier nuclei there is a discrepancy. The disagreement, which increases with increasing Z, ranges from 0.07% for 42Sc to as much as 0.13% for 54Co and is larger than the errors attached to f-values due to uncertainties in W0 (these being about 0.03-0.04%). Moreover, such differences are either comparable to or even larger than the uncertainties in t and δc. The disagreement is attributed to the different evaluations of the second-forbidden nuclear matrix elements. The choice of the parameters used in both methods is also discussed. © 1983. |
| format |
JOUR |
| author |
Szybisz, L. Silbergleit, V.M. Sidelnik, J.I. |
| spellingShingle |
Szybisz, L. Silbergleit, V.M. Sidelnik, J.I. Large difference between two methods of calculating the integrated fermi function in superallowed β-decays |
| author_facet |
Szybisz, L. Silbergleit, V.M. Sidelnik, J.I. |
| author_sort |
Szybisz, L. |
| title |
Large difference between two methods of calculating the integrated fermi function in superallowed β-decays |
| title_short |
Large difference between two methods of calculating the integrated fermi function in superallowed β-decays |
| title_full |
Large difference between two methods of calculating the integrated fermi function in superallowed β-decays |
| title_fullStr |
Large difference between two methods of calculating the integrated fermi function in superallowed β-decays |
| title_full_unstemmed |
Large difference between two methods of calculating the integrated fermi function in superallowed β-decays |
| title_sort |
large difference between two methods of calculating the integrated fermi function in superallowed β-decays |
| url |
http://hdl.handle.net/20.500.12110/paper_03702693_v122_n2_p131_Szybisz |
| work_keys_str_mv |
AT szybiszl largedifferencebetweentwomethodsofcalculatingtheintegratedfermifunctioninsuperallowedbdecays AT silbergleitvm largedifferencebetweentwomethodsofcalculatingtheintegratedfermifunctioninsuperallowedbdecays AT sidelnikji largedifferencebetweentwomethodsofcalculatingtheintegratedfermifunctioninsuperallowedbdecays |
| _version_ |
1807322404470390784 |