Cargando…

Study of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovae

The underlying physics triggering core collapse supernovae is not fully understood but observations of material ejected during such events helps to solve this puzzle. In particular, several satellite based γ -ray observations of the isotope 44 Ti have been reported recently. Conveniently, the amount...

Descripción completa

Detalles Bibliográficos
Autores principales: Margerin, V, Murphy, A St J, Davinson, T, Dressler, R, Fallis, J, Kankainen, A, Laird, A M, Lotay, G, Mountford, D J, Murphy, C D, Seiffert, C, Schumann, D, Stowasser, T, Stora, T, Wang, C H -T, Woods, P J
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2014.03.003
http://cds.cern.ch/record/2135817
_version_ 1780949973330821120
author Margerin, V
Murphy, A St J
Davinson, T
Dressler, R
Fallis, J
Kankainen, A
Laird, A M
Lotay, G
Mountford, D J
Murphy, C D
Seiffert, C
Schumann, D
Stowasser, T
Stora, T
Wang, C H -T
Woods, P J
author_facet Margerin, V
Murphy, A St J
Davinson, T
Dressler, R
Fallis, J
Kankainen, A
Laird, A M
Lotay, G
Mountford, D J
Murphy, C D
Seiffert, C
Schumann, D
Stowasser, T
Stora, T
Wang, C H -T
Woods, P J
author_sort Margerin, V
collection CERN
description The underlying physics triggering core collapse supernovae is not fully understood but observations of material ejected during such events helps to solve this puzzle. In particular, several satellite based γ -ray observations of the isotope 44 Ti have been reported recently. Conveniently, the amount of this isotope in stellar ejecta is thought to depend critically on the explosion mechanism. The most influential reaction to the amount of 44 Ti in supernovae is 44 Ti ( α , p ) 47 V. Here we report on a direct study of this reaction conducted at the REX-ISOLDE facility, CERN. The experiment was performed with a 44 Ti beam at E lab = 2 . 16 MeV / u, corresponding to an energy distribution, for reacting α -particles, centred on E cm = 4 . 15 with a 1 σ width of 0.23 MeV. This is, for the first time, well within the Gamow window for core collapse supernovae. The material from which the 44 Ti beam was extracted originates from highly irradiated components of the SINQ spallation neutron source of the Paul Scherrer Institute. No yield above background was observed, enabling an upper limit for the rate of this reaction to be determined. This result is below expectation, suggesting that the 44 Ti ( α , p ) 47 V reaction proceeds more slowly than previously thought. Implications for astrophysical events, and remnant age, are discussed
id oai-inspirehep.net-1289788
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
record_format invenio
spelling oai-inspirehep.net-12897882022-08-10T20:15:03Zdoi:10.1016/j.physletb.2014.03.003http://cds.cern.ch/record/2135817engMargerin, VMurphy, A St JDavinson, TDressler, RFallis, JKankainen, ALaird, A MLotay, GMountford, D JMurphy, C DSeiffert, CSchumann, DStowasser, TStora, TWang, C H -TWoods, P JStudy of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovaeNuclear Physics - ExperimentThe underlying physics triggering core collapse supernovae is not fully understood but observations of material ejected during such events helps to solve this puzzle. In particular, several satellite based γ -ray observations of the isotope 44 Ti have been reported recently. Conveniently, the amount of this isotope in stellar ejecta is thought to depend critically on the explosion mechanism. The most influential reaction to the amount of 44 Ti in supernovae is 44 Ti ( α , p ) 47 V. Here we report on a direct study of this reaction conducted at the REX-ISOLDE facility, CERN. The experiment was performed with a 44 Ti beam at E lab = 2 . 16 MeV / u, corresponding to an energy distribution, for reacting α -particles, centred on E cm = 4 . 15 with a 1 σ width of 0.23 MeV. This is, for the first time, well within the Gamow window for core collapse supernovae. The material from which the 44 Ti beam was extracted originates from highly irradiated components of the SINQ spallation neutron source of the Paul Scherrer Institute. No yield above background was observed, enabling an upper limit for the rate of this reaction to be determined. This result is below expectation, suggesting that the 44 Ti ( α , p ) 47 V reaction proceeds more slowly than previously thought. Implications for astrophysical events, and remnant age, are discussedoai:inspirehep.net:12897882014
spellingShingle Nuclear Physics - Experiment
Margerin, V
Murphy, A St J
Davinson, T
Dressler, R
Fallis, J
Kankainen, A
Laird, A M
Lotay, G
Mountford, D J
Murphy, C D
Seiffert, C
Schumann, D
Stowasser, T
Stora, T
Wang, C H -T
Woods, P J
Study of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovae
title Study of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovae
title_full Study of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovae
title_fullStr Study of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovae
title_full_unstemmed Study of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovae
title_short Study of the $^{44}$Ti$(\alpha,p)^{47}$V47 reaction and implications for core collapse supernovae
title_sort study of the $^{44}$ti$(\alpha,p)^{47}$v47 reaction and implications for core collapse supernovae
topic Nuclear Physics - Experiment
url https://dx.doi.org/10.1016/j.physletb.2014.03.003
http://cds.cern.ch/record/2135817
work_keys_str_mv AT margerinv studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT murphyastj studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT davinsont studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT dresslerr studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT fallisj studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT kankainena studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT lairdam studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT lotayg studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT mountforddj studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT murphycd studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT seiffertc studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT schumannd studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT stowassert studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT storat studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT wangcht studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae
AT woodspj studyofthe44tialphap47v47reactionandimplicationsforcorecollapsesupernovae