Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei

Christian Aaen Diget; T. Baugher; D. Bazin; M. A. Bentley; J. S. Berryman; J. R. Brown; K. A. Chipps; P. J. Davies; B. R. Fulton; A. Gade; H. Iwasaki; A. M. Laird; A. Lemasson; S. McDaniel; A. Ratkiewicz; L. Scruton; A. Shore; S. R. Stroberg; D. Weisshaar; K. Wimmer; R. Winkler

doi:10.1088/1742-6596/381/1/012119

Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei

Christian Aaen Diget, T. Baugher, D. Bazin, M. A. Bentley, J. S. Berryman, J. R. Brown, K. A. Chipps, P. J. Davies, B. R. Fulton, A. Gade, H. Iwasaki, A. M. Laird, A. Lemasson, S. McDaniel, A. Ratkiewicz, L. Scruton, A. Shore, S. R. Stroberg, D. Weisshaar, K. WimmerR. Winkler

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

Abstract

Electron capture on neutron-rich medium-mass nuclei is a key process where the electrons that impede the collapse of the core of massive stars are captured, thereby producing very neutron-rich nuclei. As the core collapses, the supernova is then initiated. For the electron capture to proceed, however, the allowed Gamow-Teller (GT) transition must be unblocked either by thermal excitations or by mixing of proton configurations from a higher-lying shell into the ground-state configuration of the nucleus. The present paper presents an experiment performed at the National Superconducting Cyclotron Laboratory at Michigan State University, in which we study the configuration mixing in the neutron-rich Zn-76 isotope. The experiment utilised single-proton and single-neutron knockout with detection of reaction-residue gamma rays and measurement of the parallel momentum of the residue. Through this we investigate the proton components of the Zn-76 ground state, with a particular interest in pi-g(9/2), which may unblock the GT electron capture even at low temperatures and thereby open a new pathway for the initiation of the collapse of the pre-supernova stellar core.

Original language	English
Title of host publication	RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS
Editors	S Freeman, A Andreyev, A Bruce, A Deacon, D Jenkins, D Joss, D MacGregor, P Regan, J Simpson, G Tungate, B Wadsworth, D Watts
Place of Publication	BRISTOL
Publisher	IOP Publishing
Volume	381
DOIs	https://doi.org/10.1088/1742-6596/381/1/012119
Publication status	Published - 2012
Event	Rutherford Centennial Conference on Nuclear Physics - Manchester Duration: 8 Aug 2011 → 12 Aug 2011

Conference

Conference	Rutherford Centennial Conference on Nuclear Physics
City	Manchester
Period	8/08/11 → 12/08/11

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10.1088/1742-6596/381/1/012119

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Diget, C. A., Baugher, T., Bazin, D., Bentley, M. A., Berryman, J. S., Brown, J. R., Chipps, K. A., Davies, P. J., Fulton, B. R., Gade, A., Iwasaki, H., Laird, A. M., Lemasson, A., McDaniel, S., Ratkiewicz, A., Scruton, L., Shore, A., Stroberg, S. R., Weisshaar, D., ... Winkler, R. (2012). Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei. In S. Freeman, A. Andreyev, A. Bruce, A. Deacon, D. Jenkins, D. Joss, D. MacGregor, P. Regan, J. Simpson, G. Tungate, B. Wadsworth, & D. Watts (Eds.), RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS (Vol. 381). Article 012119 IOP Publishing. https://doi.org/10.1088/1742-6596/381/1/012119

Diget, Christian Aaen ; Baugher, T. ; Bazin, D. et al. / Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei. RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS. editor / S Freeman ; A Andreyev ; A Bruce ; A Deacon ; D Jenkins ; D Joss ; D MacGregor ; P Regan ; J Simpson ; G Tungate ; B Wadsworth ; D Watts. Vol. 381 BRISTOL : IOP Publishing, 2012.

@inproceedings{c55434ab9f944e179fdbdd63f33faace,

title = "Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei",

abstract = "Electron capture on neutron-rich medium-mass nuclei is a key process where the electrons that impede the collapse of the core of massive stars are captured, thereby producing very neutron-rich nuclei. As the core collapses, the supernova is then initiated. For the electron capture to proceed, however, the allowed Gamow-Teller (GT) transition must be unblocked either by thermal excitations or by mixing of proton configurations from a higher-lying shell into the ground-state configuration of the nucleus. The present paper presents an experiment performed at the National Superconducting Cyclotron Laboratory at Michigan State University, in which we study the configuration mixing in the neutron-rich Zn-76 isotope. The experiment utilised single-proton and single-neutron knockout with detection of reaction-residue gamma rays and measurement of the parallel momentum of the residue. Through this we investigate the proton components of the Zn-76 ground state, with a particular interest in pi-g(9/2), which may unblock the GT electron capture even at low temperatures and thereby open a new pathway for the initiation of the collapse of the pre-supernova stellar core.",

author = "Diget, {Christian Aaen} and T. Baugher and D. Bazin and Bentley, {M. A.} and Berryman, {J. S.} and Brown, {J. R.} and Chipps, {K. A.} and Davies, {P. J.} and Fulton, {B. R.} and A. Gade and H. Iwasaki and Laird, {A. M.} and A. Lemasson and S. McDaniel and A. Ratkiewicz and L. Scruton and A. Shore and Stroberg, {S. R.} and D. Weisshaar and K. Wimmer and R. Winkler",

year = "2012",

doi = "10.1088/1742-6596/381/1/012119",

language = "English",

volume = "381",

editor = "S Freeman and A Andreyev and A Bruce and A Deacon and D Jenkins and D Joss and D MacGregor and P Regan and J Simpson and G Tungate and B Wadsworth and D Watts",

booktitle = "RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS",

publisher = "IOP Publishing",

address = "United Kingdom",

note = "Rutherford Centennial Conference on Nuclear Physics ; Conference date: 08-08-2011 Through 12-08-2011",

}

Diget, CA, Baugher, T, Bazin, D, Bentley, MA, Berryman, JS, Brown, JR, Chipps, KA, Davies, PJ , Fulton, BR, Gade, A, Iwasaki, H, Laird, AM, Lemasson, A, McDaniel, S, Ratkiewicz, A, Scruton, L, Shore, A, Stroberg, SR, Weisshaar, D, Wimmer, K & Winkler, R 2012, Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei. in S Freeman, A Andreyev, A Bruce, A Deacon, D Jenkins, D Joss, D MacGregor, P Regan, J Simpson, G Tungate, B Wadsworth & D Watts (eds), RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS. vol. 381, 012119, IOP Publishing, BRISTOL, Rutherford Centennial Conference on Nuclear Physics, Manchester, 8/08/11. https://doi.org/10.1088/1742-6596/381/1/012119

Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei. / Diget, Christian Aaen; Baugher, T.; Bazin, D. et al.
RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS. ed. / S Freeman; A Andreyev; A Bruce; A Deacon; D Jenkins; D Joss; D MacGregor; P Regan; J Simpson; G Tungate; B Wadsworth; D Watts. Vol. 381 BRISTOL: IOP Publishing, 2012. 012119.

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

TY - GEN

T1 - Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei

AU - Diget, Christian Aaen

AU - Baugher, T.

AU - Bazin, D.

AU - Bentley, M. A.

AU - Berryman, J. S.

AU - Brown, J. R.

AU - Chipps, K. A.

AU - Davies, P. J.

AU - Fulton, B. R.

AU - Gade, A.

AU - Iwasaki, H.

AU - Laird, A. M.

AU - Lemasson, A.

AU - McDaniel, S.

AU - Ratkiewicz, A.

AU - Scruton, L.

AU - Shore, A.

AU - Stroberg, S. R.

AU - Weisshaar, D.

AU - Wimmer, K.

AU - Winkler, R.

PY - 2012

Y1 - 2012

N2 - Electron capture on neutron-rich medium-mass nuclei is a key process where the electrons that impede the collapse of the core of massive stars are captured, thereby producing very neutron-rich nuclei. As the core collapses, the supernova is then initiated. For the electron capture to proceed, however, the allowed Gamow-Teller (GT) transition must be unblocked either by thermal excitations or by mixing of proton configurations from a higher-lying shell into the ground-state configuration of the nucleus. The present paper presents an experiment performed at the National Superconducting Cyclotron Laboratory at Michigan State University, in which we study the configuration mixing in the neutron-rich Zn-76 isotope. The experiment utilised single-proton and single-neutron knockout with detection of reaction-residue gamma rays and measurement of the parallel momentum of the residue. Through this we investigate the proton components of the Zn-76 ground state, with a particular interest in pi-g(9/2), which may unblock the GT electron capture even at low temperatures and thereby open a new pathway for the initiation of the collapse of the pre-supernova stellar core.

AB - Electron capture on neutron-rich medium-mass nuclei is a key process where the electrons that impede the collapse of the core of massive stars are captured, thereby producing very neutron-rich nuclei. As the core collapses, the supernova is then initiated. For the electron capture to proceed, however, the allowed Gamow-Teller (GT) transition must be unblocked either by thermal excitations or by mixing of proton configurations from a higher-lying shell into the ground-state configuration of the nucleus. The present paper presents an experiment performed at the National Superconducting Cyclotron Laboratory at Michigan State University, in which we study the configuration mixing in the neutron-rich Zn-76 isotope. The experiment utilised single-proton and single-neutron knockout with detection of reaction-residue gamma rays and measurement of the parallel momentum of the residue. Through this we investigate the proton components of the Zn-76 ground state, with a particular interest in pi-g(9/2), which may unblock the GT electron capture even at low temperatures and thereby open a new pathway for the initiation of the collapse of the pre-supernova stellar core.

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U2 - 10.1088/1742-6596/381/1/012119

DO - 10.1088/1742-6596/381/1/012119

M3 - Conference contribution

VL - 381

BT - RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS

A2 - Freeman, S

A2 - Andreyev, A

A2 - Bruce, A

A2 - Deacon, A

A2 - Jenkins, D

A2 - Joss, D

A2 - MacGregor, D

A2 - Regan, P

A2 - Simpson, J

A2 - Tungate, G

A2 - Wadsworth, B

A2 - Watts, D

PB - IOP Publishing

CY - BRISTOL

T2 - Rutherford Centennial Conference on Nuclear Physics

Y2 - 8 August 2011 through 12 August 2011

ER -

Diget CA, Baugher T, Bazin D, Bentley MA, Berryman JS, Brown JR et al. Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei. In Freeman S, Andreyev A, Bruce A, Deacon A, Jenkins D, Joss D, MacGregor D, Regan P, Simpson J, Tungate G, Wadsworth B, Watts D, editors, RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS. Vol. 381. BRISTOL: IOP Publishing. 2012. 012119 doi: 10.1088/1742-6596/381/1/012119

Electron capture in core-collapse supernovae investigated through configuration mixing in neutron-rich nuclei

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