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

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

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 E_cm=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 language	English
Title of host publication	Proceedings of Science
Publisher	Proceedings of Science (PoS)
Volume	07-11-July-2015
Publication status	Published - 2014
Event	13th Nuclei in the Cosmos, NIC 2014 - Debrecen, Hungary Duration: 7 Jul 2014 → 11 Jul 2014

Conference

Conference	13th Nuclei in the Cosmos, NIC 2014
Country/Territory	Hungary
City	Debrecen
Period	7/07/14 → 11/07/14

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Murphy, A. S. 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. (2014). The abundance of ⁴⁴Ti in core collapse supernovae: Measuring the ⁴⁴Ti(α, p)⁴⁷V reaction. In Proceedings of Science (Vol. 07-11-July-2015). Article 126 Proceedings of Science (PoS).

@inproceedings{fc3f2e8bef8e4e3cba97e0f33b9646f7,

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 = "2014",

language = "English",

volume = "07-11-July-2015",

booktitle = "Proceedings of Science",

publisher = "Proceedings of Science (PoS)",

note = "13th Nuclei in the Cosmos, NIC 2014 ; Conference date: 07-07-2014 Through 11-07-2014",

}

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 2014, 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), 13th Nuclei in the Cosmos, NIC 2014, Debrecen, Hungary, 7/07/14.

TY - GEN

T1 - The abundance of 44Ti in core collapse supernovae

T2 - 13th Nuclei in the Cosmos, NIC 2014

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 - 2014

Y1 - 2014

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 - https://www.scopus.com/pages/publications/84957618168

M3 - Conference contribution

AN - SCOPUS:84957618168

VL - 07-11-July-2015

BT - Proceedings of Science

PB - Proceedings of Science (PoS)

Y2 - 7 July 2014 through 11 July 2014

ER -

The abundance of ⁴⁴Ti in core collapse supernovae: Measuring the ⁴⁴Ti(α, p)⁴⁷V reaction

Abstract

Conference

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