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

Physics

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

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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)
Pages	1-6
Number of pages	6
Volume	07-11-July-2015
Publication status	Published - 2015
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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The abundance of 44Ti in core collapse supernovae; Measuring the 44Ti(α, p)47V reaction (2014)
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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. (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). Article 126 Proceedings of Science (PoS).

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.

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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)",

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

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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 - 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.

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M3 - Published conference contribution

AN - SCOPUS:84957618168

VL - 07-11-July-2015

SP - 1

EP - 6

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

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