40Ca(α,γ)44Ti and the production of 44Ti in supernovae

C. Vockenhuber; C. O. Ouellet; L. S. The; L. Buchmann; J. Caggiano; A. A. Chen; J. M. D'Auria; B. Davids; L. Fogarty; D. Frekers; A. Hussein; D. A. Hutcheon; W. Kutschera; D. Ottewell; M. Paul; M. M. Pavan; J. Pearson; C. Ruiz; G. Ruprecht; M. Trinczek; A. Wallner

doi:10.1088/0954-3899/35/1/014034

⁴⁰Ca(α,γ)⁴⁴Ti and the production of ⁴⁴Ti in supernovae

C. Vockenhuber^*, C. O. Ouellet, L. S. The, L. Buchmann, J. Caggiano, A. A. Chen, J. M. D'Auria, B. Davids, L. Fogarty, D. Frekers, A. Hussein, D. A. Hutcheon, W. Kutschera, D. Ottewell, M. Paul, M. M. Pavan, J. Pearson, C. Ruiz, G. Ruprecht, M. TrinczekA. Wallner

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The nuclide ⁴⁴Ti is predicted to be produced in significant quantities in core-collapse supernovae, and indeed it has been observed in the supernova remnant Cassiopeia-A by space-based γ-ray telescopes. The main production of ⁴⁴Ti takes place in the α-rich freeze-out phase deep inside the supernova. The key reactions governing the ⁴⁴Ti abundance have been identified in an earlier sensitivity study. Using the recoil mass spectrometer DRAGON at the TRIUMF-ISAC facility in Vancouver, Canada, we measured the main production reaction ⁴⁰Ca(α,γ) ⁴⁴Ti, resulting in an increased reaction rate compared to the rate derived from previous prompt γ-ray studies, which is commonly used in supernova models. The uncertainty of the ⁴⁴Ti production is now dominated by the rate of reactions with short-lived nuclides around ⁴⁴Ti, namely ⁴⁵V(p,γ)⁴⁶Cr, ⁴⁴Ti(α,p)⁴⁷V and ⁴⁴Ti(α,γ) ⁴⁸Cr. The sensitivity of these reactions on the ⁴⁴Ti production has been revisited.

Original language	English
Article number	014034
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	35
Issue number	1
DOIs	https://doi.org/10.1088/0954-3899/35/1/014034
Publication status	Published - 2008
Externally published	Yes

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Vockenhuber, C., Ouellet, C. O., The, L. S., Buchmann, L., Caggiano, J., Chen, A. A., D'Auria, J. M., Davids, B., Fogarty, L., Frekers, D., Hussein, A., Hutcheon, D. A., Kutschera, W., Ottewell, D., Paul, M., Pavan, M. M., Pearson, J., Ruiz, C., Ruprecht, G., ... Wallner, A. (2008). ⁴⁰Ca(α,γ)⁴⁴Ti and the production of ⁴⁴Ti in supernovae. Journal of Physics G: Nuclear and Particle Physics, 35(1), Article 014034. https://doi.org/10.1088/0954-3899/35/1/014034

@article{758eafda7af040ac9be14671b999e1b5,

title = "40Ca(α,γ)44Ti and the production of 44Ti in supernovae",

abstract = "The nuclide 44Ti is predicted to be produced in significant quantities in core-collapse supernovae, and indeed it has been observed in the supernova remnant Cassiopeia-A by space-based γ-ray telescopes. The main production of 44Ti takes place in the α-rich freeze-out phase deep inside the supernova. The key reactions governing the 44Ti abundance have been identified in an earlier sensitivity study. Using the recoil mass spectrometer DRAGON at the TRIUMF-ISAC facility in Vancouver, Canada, we measured the main production reaction 40Ca(α,γ) 44Ti, resulting in an increased reaction rate compared to the rate derived from previous prompt γ-ray studies, which is commonly used in supernova models. The uncertainty of the 44Ti production is now dominated by the rate of reactions with short-lived nuclides around 44Ti, namely 45V(p,γ)46Cr, 44Ti(α,p)47V and 44Ti(α,γ) 48Cr. The sensitivity of these reactions on the 44Ti production has been revisited.",

author = "C. Vockenhuber and Ouellet, {C. O.} and The, {L. S.} and L. Buchmann and J. Caggiano and Chen, {A. A.} and D'Auria, {J. M.} and B. Davids and L. Fogarty and D. Frekers and A. Hussein and Hutcheon, {D. A.} and W. Kutschera and D. Ottewell and M. Paul and Pavan, {M. M.} and J. Pearson and C. Ruiz and G. Ruprecht and M. Trinczek and A. Wallner",

year = "2008",

doi = "10.1088/0954-3899/35/1/014034",

language = "English",

volume = "35",

journal = "Journal of Physics G: Nuclear and Particle Physics",

issn = "0954-3899",

publisher = "IOP Publishing Ltd.",

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Vockenhuber, C, Ouellet, CO, The, LS, Buchmann, L, Caggiano, J, Chen, AA, D'Auria, JM, Davids, B, Fogarty, L, Frekers, D, Hussein, A, Hutcheon, DA, Kutschera, W, Ottewell, D, Paul, M, Pavan, MM, Pearson, J, Ruiz, C, Ruprecht, G, Trinczek, M & Wallner, A 2008, '⁴⁰Ca(α,γ)⁴⁴Ti and the production of ⁴⁴Ti in supernovae', Journal of Physics G: Nuclear and Particle Physics, vol. 35, no. 1, 014034. https://doi.org/10.1088/0954-3899/35/1/014034

TY - JOUR

T1 - 40Ca(α,γ)44Ti and the production of 44Ti in supernovae

AU - Vockenhuber, C.

AU - Ouellet, C. O.

AU - The, L. S.

AU - Buchmann, L.

AU - Caggiano, J.

AU - Chen, A. A.

AU - D'Auria, J. M.

AU - Davids, B.

AU - Fogarty, L.

AU - Frekers, D.

AU - Hussein, A.

AU - Hutcheon, D. A.

AU - Kutschera, W.

AU - Ottewell, D.

AU - Paul, M.

AU - Pavan, M. M.

AU - Pearson, J.

AU - Ruiz, C.

AU - Ruprecht, G.

AU - Trinczek, M.

AU - Wallner, A.

PY - 2008

Y1 - 2008

N2 - The nuclide 44Ti is predicted to be produced in significant quantities in core-collapse supernovae, and indeed it has been observed in the supernova remnant Cassiopeia-A by space-based γ-ray telescopes. The main production of 44Ti takes place in the α-rich freeze-out phase deep inside the supernova. The key reactions governing the 44Ti abundance have been identified in an earlier sensitivity study. Using the recoil mass spectrometer DRAGON at the TRIUMF-ISAC facility in Vancouver, Canada, we measured the main production reaction 40Ca(α,γ) 44Ti, resulting in an increased reaction rate compared to the rate derived from previous prompt γ-ray studies, which is commonly used in supernova models. The uncertainty of the 44Ti production is now dominated by the rate of reactions with short-lived nuclides around 44Ti, namely 45V(p,γ)46Cr, 44Ti(α,p)47V and 44Ti(α,γ) 48Cr. The sensitivity of these reactions on the 44Ti production has been revisited.

AB - The nuclide 44Ti is predicted to be produced in significant quantities in core-collapse supernovae, and indeed it has been observed in the supernova remnant Cassiopeia-A by space-based γ-ray telescopes. The main production of 44Ti takes place in the α-rich freeze-out phase deep inside the supernova. The key reactions governing the 44Ti abundance have been identified in an earlier sensitivity study. Using the recoil mass spectrometer DRAGON at the TRIUMF-ISAC facility in Vancouver, Canada, we measured the main production reaction 40Ca(α,γ) 44Ti, resulting in an increased reaction rate compared to the rate derived from previous prompt γ-ray studies, which is commonly used in supernova models. The uncertainty of the 44Ti production is now dominated by the rate of reactions with short-lived nuclides around 44Ti, namely 45V(p,γ)46Cr, 44Ti(α,p)47V and 44Ti(α,γ) 48Cr. The sensitivity of these reactions on the 44Ti production has been revisited.

UR - http://www.scopus.com/inward/record.url?scp=38849195649&partnerID=8YFLogxK

U2 - 10.1088/0954-3899/35/1/014034

DO - 10.1088/0954-3899/35/1/014034

M3 - Article

SN - 0954-3899

VL - 35

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 1

M1 - 014034

ER -

⁴⁰Ca(α,γ)⁴⁴Ti and the production of ⁴⁴Ti in supernovae

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