Ground-state proton decay of Br69 and implications for the se68 astrophysical rapid proton-capture process waiting point

A. M. Rogers; M. A. Famiano; W. G. Lynch; M. S. Wallace; F. Amorini; D. Bazin; R. J. Charity; F. Delaunay; R. T. De Souza; J. Elson; A. Gade; D. Galaviz; M. J. Van Goethem; S. Hudan; J. Lee; S. Lobastov; S. Lukyanov; M. Mato; M. Mocko; H. Schatz; D. Shapira; L. G. Sobotka; M. B. Tsang; G. Verde

doi:10.1103/PhysRevLett.106.252503

Ground-state proton decay of Br69 and implications for the se68 astrophysical rapid proton-capture process waiting point

A. M. Rogers, M. A. Famiano, W. G. Lynch, M. S. Wallace, F. Amorini, D. Bazin, R. J. Charity, F. Delaunay, R. T. De Souza, J. Elson, A. Gade, D. Galaviz, M. J. Van Goethem, S. Hudan, J. Lee, S. Lobastov, S. Lukyanov, M. Mato, M. Mocko, H. SchatzD. Shapira, L. G. Sobotka, M. B. Tsang, G. Verde

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Abstract

We report on the first direct measurement of the proton separation energy for the proton-unbound nucleus Br69. Bypassing the Se68 waiting point in the rp process is directly related to the 2p-capture rate through Br69, which depends exponentially on the proton separation energy. We find a proton separation energy for Br69 of S_p(Br69)=-785-40+34keV; this is less bound compared to previous predictions which have relied on uncertain theoretical calculations. The influence of the extracted proton separation energy on the rp process occurring in type I x-ray bursts is examined within the context of a one-zone burst model.

Original language	English
Article number	252503
Journal	Physical Review Letters
Volume	106
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.106.252503
State	Published - 24 Jun 2011
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (all)

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10.1103/PhysRevLett.106.252503

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Rogers, A. M., Famiano, M. A., Lynch, W. G., Wallace, M. S., Amorini, F., Bazin, D., Charity, R. J., Delaunay, F., De Souza, R. T., Elson, J., Gade, A., Galaviz, D., Van Goethem, M. J., Hudan, S., Lee, J., Lobastov, S., Lukyanov, S., Mato, M., Mocko, M., ... Verde, G. (2011). Ground-state proton decay of Br69 and implications for the se68 astrophysical rapid proton-capture process waiting point. Physical Review Letters, 106(25), [252503]. https://doi.org/10.1103/PhysRevLett.106.252503

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title = "Ground-state proton decay of Br69 and implications for the se68 astrophysical rapid proton-capture process waiting point",

abstract = "We report on the first direct measurement of the proton separation energy for the proton-unbound nucleus Br69. Bypassing the Se68 waiting point in the rp process is directly related to the 2p-capture rate through Br69, which depends exponentially on the proton separation energy. We find a proton separation energy for Br69 of Sp(Br69)=-785-40+34keV; this is less bound compared to previous predictions which have relied on uncertain theoretical calculations. The influence of the extracted proton separation energy on the rp process occurring in type I x-ray bursts is examined within the context of a one-zone burst model.",

author = "Rogers, {A. M.} and Famiano, {M. A.} and Lynch, {W. G.} and Wallace, {M. S.} and F. Amorini and D. Bazin and Charity, {R. J.} and F. Delaunay and {De Souza}, {R. T.} and J. Elson and A. Gade and D. Galaviz and {Van Goethem}, {M. J.} and S. Hudan and J. Lee and S. Lobastov and S. Lukyanov and M. Mato and M. Mocko and H. Schatz and D. Shapira and Sobotka, {L. G.} and Tsang, {M. B.} and G. Verde",

year = "2011",

month = jun,

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doi = "10.1103/PhysRevLett.106.252503",

language = "English",

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Rogers, AM, Famiano, MA, Lynch, WG, Wallace, MS, Amorini, F, Bazin, D, Charity, RJ, Delaunay, F, De Souza, RT, Elson, J, Gade, A, Galaviz, D, Van Goethem, MJ, Hudan, S, Lee, J, Lobastov, S, Lukyanov, S, Mato, M, Mocko, M, Schatz, H, Shapira, D, Sobotka, LG, Tsang, MB & Verde, G 2011, 'Ground-state proton decay of Br69 and implications for the se68 astrophysical rapid proton-capture process waiting point', Physical Review Letters, vol. 106, no. 25, 252503. https://doi.org/10.1103/PhysRevLett.106.252503

TY - JOUR

T1 - Ground-state proton decay of Br69 and implications for the se68 astrophysical rapid proton-capture process waiting point

AU - Rogers, A. M.

AU - Famiano, M. A.

AU - Lynch, W. G.

AU - Wallace, M. S.

AU - Amorini, F.

AU - Bazin, D.

AU - Charity, R. J.

AU - Delaunay, F.

AU - De Souza, R. T.

AU - Elson, J.

AU - Gade, A.

AU - Galaviz, D.

AU - Van Goethem, M. J.

AU - Hudan, S.

AU - Lee, J.

AU - Lobastov, S.

AU - Lukyanov, S.

AU - Mato, M.

AU - Mocko, M.

AU - Schatz, H.

AU - Shapira, D.

AU - Sobotka, L. G.

AU - Tsang, M. B.

AU - Verde, G.

PY - 2011/6/24

Y1 - 2011/6/24

N2 - We report on the first direct measurement of the proton separation energy for the proton-unbound nucleus Br69. Bypassing the Se68 waiting point in the rp process is directly related to the 2p-capture rate through Br69, which depends exponentially on the proton separation energy. We find a proton separation energy for Br69 of Sp(Br69)=-785-40+34keV; this is less bound compared to previous predictions which have relied on uncertain theoretical calculations. The influence of the extracted proton separation energy on the rp process occurring in type I x-ray bursts is examined within the context of a one-zone burst model.

AB - We report on the first direct measurement of the proton separation energy for the proton-unbound nucleus Br69. Bypassing the Se68 waiting point in the rp process is directly related to the 2p-capture rate through Br69, which depends exponentially on the proton separation energy. We find a proton separation energy for Br69 of Sp(Br69)=-785-40+34keV; this is less bound compared to previous predictions which have relied on uncertain theoretical calculations. The influence of the extracted proton separation energy on the rp process occurring in type I x-ray bursts is examined within the context of a one-zone burst model.

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JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Ground-state proton decay of Br69 and implications for the se68 astrophysical rapid proton-capture process waiting point

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