Decay spectroscopy for nuclear astrophysics: β-delayed proton decay

L. Trache; E. Simmons; A. Spiridon; M. McCleskey; B.T. Roeder; R.E. Tribble; A. Saastamoinen; A. Jokinen; J. Aysto; T. Davinson; P.J. Woods; E. Pollacco; M. Kebbiri; G. Pascovici

doi:10.1063/1.3664152

Decay spectroscopy for nuclear astrophysics: β-delayed proton decay

L. Trache, E. Simmons, A. Spiridon, M. McCleskey, B.T. Roeder, R.E. Tribble, A. Saastamoinen, A. Jokinen, J. Aysto, T. Davinson, P.J. Woods, E. Pollacco, M. Kebbiri, G. Pascovici

School of Physics and Astronomy

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

Abstract

Decay spectroscopy is one of the oldest indirect methods in nuclear astrophysics. We have developed at TAMU techniques to measure beta- and beta-delayed proton decay of sd-shell, proton-rich nuclei. The short-lived radioactive species are produced in-flight, separated, then slowed down (from about 40 MeV/u) and implanted in the middle of very thin Si detectors. These allowed us to measure protons with energies as low as 200 keV from nuclei with lifetimes of 100 ms or less. At the same time we measure gamma-rays up to 8 MeV with high resolution HPGe detectors. We have studied the decay of Al, P, Cl, all important for understanding explosive H-burning in novae. The technique has shown a remarkable selectivity to beta-delayed charged-particle emission and works even at radioactive beam rates of a few pps. The states populated are resonances for the radiative proton capture reactions Na(p,γ) Mg (crucial for the depletion of Na in novae), Al(p, γ) Si and P(p,γ) S (bottleneck in novae and XRB burning), respectively. More recently we have radically improved the technique using a gas based detector we call AstroBox.

Original language	English
Title of host publication	AIP Conference Proceedings
Editors	B Blank
Place of Publication	MELVILLE
Publisher	American Institute of Physics
Pages	67-70
Number of pages	4
Volume	1409
ISBN (Print)	978-0-7354-0983-5
DOIs	https://doi.org/10.1063/1.3664152
Publication status	Published - 2011
Event	4th International Conference on Proton Emitting Nuclei and Related Topics - Bordeaux, France Duration: 6 Jun 2011 → 10 Jun 2011

Publication series

Name	AIP Conference Proceedings
Publisher	AMER INST PHYSICS
Volume	1409
ISSN (Print)	0094-243X

Conference

Conference	4th International Conference on Proton Emitting Nuclei and Related Topics
Country	France
Period	6/06/11 → 10/06/11

Keywords

nuclear astrophysics
b-delayed proton decay
H-burning
resonant proton capture

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10.1063/1.3664152

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Trache, L., Simmons, E., Spiridon, A., McCleskey, M., Roeder, B. T., Tribble, R. E., Saastamoinen, A., Jokinen, A., Aysto, J., Davinson, T., Woods, P. J., Pollacco, E., Kebbiri, M., & Pascovici, G. (2011). Decay spectroscopy for nuclear astrophysics: β-delayed proton decay. In B. Blank (Ed.), AIP Conference Proceedings (Vol. 1409, pp. 67-70). (AIP Conference Proceedings; Vol. 1409). American Institute of Physics. https://doi.org/10.1063/1.3664152

Trache, L. ; Simmons, E. ; Spiridon, A. ; McCleskey, M. ; Roeder, B.T. ; Tribble, R.E. ; Saastamoinen, A. ; Jokinen, A. ; Aysto, J. ; Davinson, T. ; Woods, P.J. ; Pollacco, E. ; Kebbiri, M. ; Pascovici, G. / Decay spectroscopy for nuclear astrophysics : β-delayed proton decay. AIP Conference Proceedings. editor / B Blank. Vol. 1409 MELVILLE : American Institute of Physics, 2011. pp. 67-70 (AIP Conference Proceedings).

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abstract = "Decay spectroscopy is one of the oldest indirect methods in nuclear astrophysics. We have developed at TAMU techniques to measure beta- and beta-delayed proton decay of sd-shell, proton-rich nuclei. The short-lived radioactive species are produced in-flight, separated, then slowed down (from about 40 MeV/u) and implanted in the middle of very thin Si detectors. These allowed us to measure protons with energies as low as 200 keV from nuclei with lifetimes of 100 ms or less. At the same time we measure gamma-rays up to 8 MeV with high resolution HPGe detectors. We have studied the decay of Al, P, Cl, all important for understanding explosive H-burning in novae. The technique has shown a remarkable selectivity to beta-delayed charged-particle emission and works even at radioactive beam rates of a few pps. The states populated are resonances for the radiative proton capture reactions Na(p,γ) Mg (crucial for the depletion of Na in novae), Al(p, γ) Si and P(p,γ) S (bottleneck in novae and XRB burning), respectively. More recently we have radically improved the technique using a gas based detector we call AstroBox.",

keywords = "nuclear astrophysics, b-delayed proton decay, H-burning, resonant proton capture",

author = "L. Trache and E. Simmons and A. Spiridon and M. McCleskey and B.T. Roeder and R.E. Tribble and A. Saastamoinen and A. Jokinen and J. Aysto and T. Davinson and P.J. Woods and E. Pollacco and M. Kebbiri and G. Pascovici",

year = "2011",

doi = "10.1063/1.3664152",

language = "English",

isbn = "978-0-7354-0983-5",

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series = "AIP Conference Proceedings",

publisher = "American Institute of Physics",

pages = "67--70",

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note = "4th International Conference on Proton Emitting Nuclei and Related Topics ; Conference date: 06-06-2011 Through 10-06-2011",

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Trache, L, Simmons, E, Spiridon, A, McCleskey, M, Roeder, BT, Tribble, RE, Saastamoinen, A, Jokinen, A, Aysto, J, Davinson, T , Woods, PJ, Pollacco, E, Kebbiri, M & Pascovici, G 2011, Decay spectroscopy for nuclear astrophysics: β-delayed proton decay. in B Blank (ed.), AIP Conference Proceedings. vol. 1409, AIP Conference Proceedings, vol. 1409, American Institute of Physics, MELVILLE, pp. 67-70, 4th International Conference on Proton Emitting Nuclei and Related Topics, France, 6/06/11. https://doi.org/10.1063/1.3664152

Decay spectroscopy for nuclear astrophysics : β-delayed proton decay. / Trache, L.; Simmons, E.; Spiridon, A.; McCleskey, M.; Roeder, B.T.; Tribble, R.E.; Saastamoinen, A.; Jokinen, A.; Aysto, J.; Davinson, T.; Woods, P.J.; Pollacco, E.; Kebbiri, M.; Pascovici, G.

AIP Conference Proceedings. ed. / B Blank. Vol. 1409 MELVILLE : American Institute of Physics, 2011. p. 67-70 (AIP Conference Proceedings; Vol. 1409).

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

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T1 - Decay spectroscopy for nuclear astrophysics

T2 - 4th International Conference on Proton Emitting Nuclei and Related Topics

AU - Trache, L.

AU - Simmons, E.

AU - Spiridon, A.

AU - McCleskey, M.

AU - Roeder, B.T.

AU - Tribble, R.E.

AU - Saastamoinen, A.

AU - Jokinen, A.

AU - Aysto, J.

AU - Davinson, T.

AU - Woods, P.J.

AU - Pollacco, E.

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AB - Decay spectroscopy is one of the oldest indirect methods in nuclear astrophysics. We have developed at TAMU techniques to measure beta- and beta-delayed proton decay of sd-shell, proton-rich nuclei. The short-lived radioactive species are produced in-flight, separated, then slowed down (from about 40 MeV/u) and implanted in the middle of very thin Si detectors. These allowed us to measure protons with energies as low as 200 keV from nuclei with lifetimes of 100 ms or less. At the same time we measure gamma-rays up to 8 MeV with high resolution HPGe detectors. We have studied the decay of Al, P, Cl, all important for understanding explosive H-burning in novae. The technique has shown a remarkable selectivity to beta-delayed charged-particle emission and works even at radioactive beam rates of a few pps. The states populated are resonances for the radiative proton capture reactions Na(p,γ) Mg (crucial for the depletion of Na in novae), Al(p, γ) Si and P(p,γ) S (bottleneck in novae and XRB burning), respectively. More recently we have radically improved the technique using a gas based detector we call AstroBox.

KW - nuclear astrophysics

KW - b-delayed proton decay

KW - H-burning

KW - resonant proton capture

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