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• W3043105844 abstract "Abstract In this review we will present the results of recent $$beta $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>β</mml:mi> </mml:math> -decay studies using the total absorption technique that cover topics of interest for applications, nuclear structure and astrophysics. The decays studied were selected primarily because they have a large impact on the prediction of (a) the decay heat in reactors, important for the safety of present and future reactors and (b) the reactor electron anti-neutrino spectrum, of interest for particle/nuclear physics and reactor monitoring. For these studies the total absorption technique was chosen, since it is the only method that allows one to obtain $$beta $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>β</mml:mi> </mml:math> -decay probabilities free from a systematic error called the Pandemonium effect. The total absorption technique is based on the detection of the $$gamma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>γ</mml:mi> </mml:math> cascades that follow the initial $$beta $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>β</mml:mi> </mml:math> decay. For this reason the technique requires the use of calorimeters with very high $$gamma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>γ</mml:mi> </mml:math> detection efficiency. The measurements presented and discussed here were performed mainly at the IGISOL facility of the University of Jyväskylä (Finland) using isotopically pure beams provided by the JYFLTRAP Penning trap. Examples are presented to show that the results of our measurements on selected nuclei have had a large impact on predictions of both the decay heat and the anti-neutrino spectrum from reactors. Some of the cases involve $$beta $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>β</mml:mi> </mml:math> -delayed neutron emission thus one can study the competition between $$gamma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>γ</mml:mi> </mml:math> - and neutron-emission from states above the neutron separation energy. The $$gamma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>γ</mml:mi> </mml:math> -to-neutron emission ratios can be used to constrain neutron capture (n, $$gamma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>γ</mml:mi> </mml:math> ) cross sections for unstable nuclei of interest in astrophysics. The information obtained from the measurements can also be used to test nuclear model predictions of half-lives and Pn values for decays of interest in astrophysical network calculations. These comparisons also provide insights into aspects of nuclear structure in particular regions of the nuclear chart." @default.
• W3043105844 created "2020-07-23" @default.
• W3043105844 creator A5011315934 @default.
• W3043105844 creator A5019345633 @default.
• W3043105844 creator A5043196088 @default.
• W3043105844 creator A5058288841 @default.
• W3043105844 creator A5077543425 @default.
• W3043105844 date "2021-03-01" @default.
• W3043105844 modified "2023-10-16" @default.
• W3043105844 title "Beta-decay studies for applied and basic nuclear physics" @default.
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