The abundance of 44Ti in core collapse supernovae

Measuring the 44Ti(α, p)47V reaction

A. St J Murphy, T. Davinson, A. Kankainen, G. Lotay, D. J. Mountford, C. D. Murphy, P. J. Woods, R. Dressler, D. Schumann, T. Stowasser, J. Fallis, A. M. Laird, C. Seiffert, T. Stora, C. H T Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Downloads (Pure)

Abstract

Space-based γ-ray satellites such as BeppoSAX, COMPTEL and INTEGRAL have reported detection of 44Ti in the Cassiopeia-A and SN1987a core-collapse supernova remnants. The NuSTAR satellite has recently measured the distribution of 44Ti γ-ray emission in Cassiopeia-A finding a highly asymmetric distribution. In all cases, the amounts of 44Ti inferred in the ejecta are higher than expected, even assuming a wide range of progenitor models and masses. The dominant nuclear uncertainty within such models is the rate of the 44Ti(α, p)47V nuclear reaction rate. Through radiochemical separation, a sample of 44Ti was obtained from highly-irradiated martensitic steel accelerator components of the Paul Scherrer Institute. Transported to CERN, this material was then developed into a beam at the REX-ISOLDE facility and directed onto a gas filled cell. This enabled a study of the 44Ti(α, p)47V reaction at an energy of Ecm=4.15 MeV, finding an upper limit for the cross section of 40 μb (68% c.l.). Possible implications for core collapse supernovae are presented.

Original languageEnglish
Title of host publicationProceedings of Science
PublisherProceedings of Science (PoS)
Pages1-6
Number of pages6
Volume07-11-July-2015
Publication statusPublished - 2015
Event13th Nuclei in the Cosmos, NIC 2014 - Debrecen, Hungary
Duration: 7 Jul 201411 Jul 2014

Conference

Conference13th Nuclei in the Cosmos, NIC 2014
CountryHungary
CityDebrecen
Period7/07/1411/07/14

Fingerprint

Cassiopeia A
supernovae
rays
radiochemical separation
supernova remnants
ejecta
nuclear reactions
reaction kinetics
accelerators
steels
cross sections
cells
gases
energy

ASJC Scopus subject areas

  • General

Cite this

Murphy, A. S. J., Davinson, T., Kankainen, A., Lotay, G., Mountford, D. J., Murphy, C. D., ... Wang, C. H. T. (2015). The abundance of 44Ti in core collapse supernovae: Measuring the 44Ti(α, p)47V reaction. In Proceedings of Science (Vol. 07-11-July-2015, pp. 1-6). [126] Proceedings of Science (PoS).

The abundance of 44Ti in core collapse supernovae : Measuring the 44Ti(α, p)47V reaction. / Murphy, A. St J; Davinson, T.; Kankainen, A.; Lotay, G.; Mountford, D. J.; Murphy, C. D.; Woods, P. J.; Dressler, R.; Schumann, D.; Stowasser, T.; Fallis, J.; Laird, A. M.; Seiffert, C.; Stora, T.; Wang, C. H T.

Proceedings of Science. Vol. 07-11-July-2015 Proceedings of Science (PoS), 2015. p. 1-6 126.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Murphy, ASJ, Davinson, T, Kankainen, A, Lotay, G, Mountford, DJ, Murphy, CD, Woods, PJ, Dressler, R, Schumann, D, Stowasser, T, Fallis, J, Laird, AM, Seiffert, C, Stora, T & Wang, CHT 2015, The abundance of 44Ti in core collapse supernovae: Measuring the 44Ti(α, p)47V reaction. in Proceedings of Science. vol. 07-11-July-2015, 126, Proceedings of Science (PoS), pp. 1-6, 13th Nuclei in the Cosmos, NIC 2014, Debrecen, Hungary, 7/07/14.
Murphy ASJ, Davinson T, Kankainen A, Lotay G, Mountford DJ, Murphy CD et al. The abundance of 44Ti in core collapse supernovae: Measuring the 44Ti(α, p)47V reaction. In Proceedings of Science. Vol. 07-11-July-2015. Proceedings of Science (PoS). 2015. p. 1-6. 126
Murphy, A. St J ; Davinson, T. ; Kankainen, A. ; Lotay, G. ; Mountford, D. J. ; Murphy, C. D. ; Woods, P. J. ; Dressler, R. ; Schumann, D. ; Stowasser, T. ; Fallis, J. ; Laird, A. M. ; Seiffert, C. ; Stora, T. ; Wang, C. H T. / The abundance of 44Ti in core collapse supernovae : Measuring the 44Ti(α, p)47V reaction. Proceedings of Science. Vol. 07-11-July-2015 Proceedings of Science (PoS), 2015. pp. 1-6
@inproceedings{6812fd2baf3246f1b6dbdd0c57c6b40a,
title = "The abundance of 44Ti in core collapse supernovae: Measuring the 44Ti(α, p)47V reaction",
abstract = "Space-based γ-ray satellites such as BeppoSAX, COMPTEL and INTEGRAL have reported detection of 44Ti in the Cassiopeia-A and SN1987a core-collapse supernova remnants. The NuSTAR satellite has recently measured the distribution of 44Ti γ-ray emission in Cassiopeia-A finding a highly asymmetric distribution. In all cases, the amounts of 44Ti inferred in the ejecta are higher than expected, even assuming a wide range of progenitor models and masses. The dominant nuclear uncertainty within such models is the rate of the 44Ti(α, p)47V nuclear reaction rate. Through radiochemical separation, a sample of 44Ti was obtained from highly-irradiated martensitic steel accelerator components of the Paul Scherrer Institute. Transported to CERN, this material was then developed into a beam at the REX-ISOLDE facility and directed onto a gas filled cell. This enabled a study of the 44Ti(α, p)47V reaction at an energy of Ecm=4.15 MeV, finding an upper limit for the cross section of 40 μb (68{\%} c.l.). Possible implications for core collapse supernovae are presented.",
author = "Murphy, {A. St J} and T. Davinson and A. Kankainen and G. Lotay and Mountford, {D. J.} and Murphy, {C. D.} and Woods, {P. J.} and R. Dressler and D. Schumann and T. Stowasser and J. Fallis and Laird, {A. M.} and C. Seiffert and T. Stora and Wang, {C. H T}",
year = "2015",
language = "English",
volume = "07-11-July-2015",
pages = "1--6",
booktitle = "Proceedings of Science",
publisher = "Proceedings of Science (PoS)",

}

TY - GEN

T1 - The abundance of 44Ti in core collapse supernovae

T2 - Measuring the 44Ti(α, p)47V reaction

AU - Murphy, A. St J

AU - Davinson, T.

AU - Kankainen, A.

AU - Lotay, G.

AU - Mountford, D. J.

AU - Murphy, C. D.

AU - Woods, P. J.

AU - Dressler, R.

AU - Schumann, D.

AU - Stowasser, T.

AU - Fallis, J.

AU - Laird, A. M.

AU - Seiffert, C.

AU - Stora, T.

AU - Wang, C. H T

PY - 2015

Y1 - 2015

N2 - Space-based γ-ray satellites such as BeppoSAX, COMPTEL and INTEGRAL have reported detection of 44Ti in the Cassiopeia-A and SN1987a core-collapse supernova remnants. The NuSTAR satellite has recently measured the distribution of 44Ti γ-ray emission in Cassiopeia-A finding a highly asymmetric distribution. In all cases, the amounts of 44Ti inferred in the ejecta are higher than expected, even assuming a wide range of progenitor models and masses. The dominant nuclear uncertainty within such models is the rate of the 44Ti(α, p)47V nuclear reaction rate. Through radiochemical separation, a sample of 44Ti was obtained from highly-irradiated martensitic steel accelerator components of the Paul Scherrer Institute. Transported to CERN, this material was then developed into a beam at the REX-ISOLDE facility and directed onto a gas filled cell. This enabled a study of the 44Ti(α, p)47V reaction at an energy of Ecm=4.15 MeV, finding an upper limit for the cross section of 40 μb (68% c.l.). Possible implications for core collapse supernovae are presented.

AB - Space-based γ-ray satellites such as BeppoSAX, COMPTEL and INTEGRAL have reported detection of 44Ti in the Cassiopeia-A and SN1987a core-collapse supernova remnants. The NuSTAR satellite has recently measured the distribution of 44Ti γ-ray emission in Cassiopeia-A finding a highly asymmetric distribution. In all cases, the amounts of 44Ti inferred in the ejecta are higher than expected, even assuming a wide range of progenitor models and masses. The dominant nuclear uncertainty within such models is the rate of the 44Ti(α, p)47V nuclear reaction rate. Through radiochemical separation, a sample of 44Ti was obtained from highly-irradiated martensitic steel accelerator components of the Paul Scherrer Institute. Transported to CERN, this material was then developed into a beam at the REX-ISOLDE facility and directed onto a gas filled cell. This enabled a study of the 44Ti(α, p)47V reaction at an energy of Ecm=4.15 MeV, finding an upper limit for the cross section of 40 μb (68% c.l.). Possible implications for core collapse supernovae are presented.

UR - http://www.scopus.com/inward/record.url?scp=84957618168&partnerID=8YFLogxK

M3 - Conference contribution

VL - 07-11-July-2015

SP - 1

EP - 6

BT - Proceedings of Science

PB - Proceedings of Science (PoS)

ER -