We performed theoretical studies on Heavy ion charge exchange reactions, at low energies, focusing on the interplay between nuclear structure and reaction dynamics. Such studies allow also to enlight the existence of a relation between Heavy ion double charge exchange (HIDCE) cross section at forward scattering angles and double beta ($\beta\beta$) decay nuclear matrix element (NME) of the target or projectile nucleus considered. HIDCE reactions can be described as a sequence of two single charge changing processes, which can be correlated or not, thus mimicking $0\nu\beta\beta$ and $2\nu\beta\beta$ decays, respectively. The dominance of the former mechanism would allow to gain information on $0\nu\beta\beta$ NME, thus in turn allowing to determine neutrino Majorana mass with a significant accuracy, if such weak decay were observed.
Sono stati condotti studi teorici sulle reazioni nucleari di scambio di carica tra ioni pesanti, a basse energie, ponendo l'attenzione sull'interazione tra la struttura nucleare e la dinamica di reazione. Tali studi hanno anche permesso di mettere in luce il legame fra la sezione d urto, a piccoli angoli, associata ai processi di doppio scambio di carica (DCE) fra ioni pesanti e l'elemento di matrice nucleare (NME) che descrive il doppio decadimento beta nei nuclei proiettile e bersaglio. Le reazioni nucleari DCE possono essere interpretate come convoluzione di due processi di singolo scambio correlati o meno, mimando così i decadimenti $0\nu\beta\beta$ e $2\nu\beta\beta$, rispettivamente. Il predominio del primo meccanismo permetterebbe di dedurre informazioni sul NME di $0\nu\beta\beta$ e, in ultima analisi, sulla massa efficace del neutrino, qualora tale decadimento fosse osservato.
Determination of the link between heavy ion charge exchange reactions and single and double beta decay matrix elements / Bellone, JESSICA ILARIA. - (2018 Nov 29).
Determination of the link between heavy ion charge exchange reactions and single and double beta decay matrix elements
BELLONE, JESSICA ILARIA
2018-11-29
Abstract
We performed theoretical studies on Heavy ion charge exchange reactions, at low energies, focusing on the interplay between nuclear structure and reaction dynamics. Such studies allow also to enlight the existence of a relation between Heavy ion double charge exchange (HIDCE) cross section at forward scattering angles and double beta ($\beta\beta$) decay nuclear matrix element (NME) of the target or projectile nucleus considered. HIDCE reactions can be described as a sequence of two single charge changing processes, which can be correlated or not, thus mimicking $0\nu\beta\beta$ and $2\nu\beta\beta$ decays, respectively. The dominance of the former mechanism would allow to gain information on $0\nu\beta\beta$ NME, thus in turn allowing to determine neutrino Majorana mass with a significant accuracy, if such weak decay were observed.File | Dimensione | Formato | |
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