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. Schatz

D. Shapira, L. G. Sobotka, M. B. Tsang, G. Verde

Department of Chemistry

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

35 Scopus citations

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 - Jun 24 2011

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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), Article 252503. https://doi.org/10.1103/PhysRevLett.106.252503

@article{ba0b3d8f897a4c6ca4bf582e2aa673c1,

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,

day = "24",

doi = "10.1103/PhysRevLett.106.252503",

language = "English",

volume = "106",

journal = "Physical Review Letters",

issn = "0031-9007",

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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.

UR - https://www.scopus.com/pages/publications/79960624277

U2 - 10.1103/PhysRevLett.106.252503

DO - 10.1103/PhysRevLett.106.252503

M3 - Article

AN - SCOPUS:79960624277

SN - 0031-9007

VL - 106

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 252503

ER -

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

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