New measurement of the proton capture rate on 7Be and the S 17(0) factor

L. T. Baby; C. Bordeanu; G. Goldring; M. Hass; L. Weissman; V. N. Fedoseyev; U. Köster; Y. Nir-El; G. Haquin; H. W. Gäggeler; R. Weinreich

doi:10.1103/PhysRevC.67.065805

New measurement of the proton capture rate on ⁷Be and the S ₁₇(0) factor

L. T. Baby, C. Bordeanu, G. Goldring, M. Hass, L. Weissman, V. N. Fedoseyev, U. Köster, Y. Nir-El, G. Haquin, H. W. Gäggeler, R. Weinreich

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

65 Scopus citations

Abstract

The ⁷Be(p, γ)⁸B reaction plays a central role in the evaluation of solar neutrino fluxes. We report on a new precision measurement of the cross section of this reaction, following our previous experiment with an implanted ⁷Be target, a raster-scanned beam, and the elimination of backscattering losses. The new measurement incorporates a higher activity ⁷Be target and a number of improvements in design and procedure. The cross section at a selected energy E_c.m. = 850 keV (where c.m. stands for center of mass) was measured several times under varying experimental conditions, yielding a value of S₁₇(E _c.m. = 850 keV) = 24.0±0.5 eV b, to serve as a benchmark. Measurements were carried out at lower energies as well. Due to the precise knowledge of the implanted ⁷Be density profile, it was possible to reconstitute both the off- and on-resonance parts of the cross section and to obtain from the entire set of measurements an extrapolated value of S ₁₇(0) = 21.2±0.7 eV b, using the cluster model of Descouvemont and Baye.

Original language	English
Article number	065805
Pages (from-to)	658051-6580514
Number of pages	5922464
Journal	Physical Review C - Nuclear Physics
Volume	67
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.67.065805
State	Published - 1 Jan 2003
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevC.67.065805

Cite this

@article{c341c4f936df4bb8a947f1097bc5d9fb,

title = "New measurement of the proton capture rate on 7Be and the S 17(0) factor",

abstract = "The 7Be(p, γ)8B reaction plays a central role in the evaluation of solar neutrino fluxes. We report on a new precision measurement of the cross section of this reaction, following our previous experiment with an implanted 7Be target, a raster-scanned beam, and the elimination of backscattering losses. The new measurement incorporates a higher activity 7Be target and a number of improvements in design and procedure. The cross section at a selected energy Ec.m. = 850 keV (where c.m. stands for center of mass) was measured several times under varying experimental conditions, yielding a value of S17(E c.m. = 850 keV) = 24.0±0.5 eV b, to serve as a benchmark. Measurements were carried out at lower energies as well. Due to the precise knowledge of the implanted 7Be density profile, it was possible to reconstitute both the off- and on-resonance parts of the cross section and to obtain from the entire set of measurements an extrapolated value of S 17(0) = 21.2±0.7 eV b, using the cluster model of Descouvemont and Baye.",

author = "Baby, {L. T.} and C. Bordeanu and G. Goldring and M. Hass and L. Weissman and Fedoseyev, {V. N.} and U. K{\"o}ster and Y. Nir-El and G. Haquin and G{\"a}ggeler, {H. W.} and R. Weinreich",

year = "2003",

month = jan,

day = "1",

doi = "10.1103/PhysRevC.67.065805",

language = "English",

volume = "67",

pages = "658051--6580514",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - New measurement of the proton capture rate on 7Be and the S 17(0) factor

AU - Baby, L. T.

AU - Bordeanu, C.

AU - Goldring, G.

AU - Hass, M.

AU - Weissman, L.

AU - Fedoseyev, V. N.

AU - Köster, U.

AU - Nir-El, Y.

AU - Haquin, G.

AU - Gäggeler, H. W.

AU - Weinreich, R.

PY - 2003/1/1

Y1 - 2003/1/1

N2 - The 7Be(p, γ)8B reaction plays a central role in the evaluation of solar neutrino fluxes. We report on a new precision measurement of the cross section of this reaction, following our previous experiment with an implanted 7Be target, a raster-scanned beam, and the elimination of backscattering losses. The new measurement incorporates a higher activity 7Be target and a number of improvements in design and procedure. The cross section at a selected energy Ec.m. = 850 keV (where c.m. stands for center of mass) was measured several times under varying experimental conditions, yielding a value of S17(E c.m. = 850 keV) = 24.0±0.5 eV b, to serve as a benchmark. Measurements were carried out at lower energies as well. Due to the precise knowledge of the implanted 7Be density profile, it was possible to reconstitute both the off- and on-resonance parts of the cross section and to obtain from the entire set of measurements an extrapolated value of S 17(0) = 21.2±0.7 eV b, using the cluster model of Descouvemont and Baye.

AB - The 7Be(p, γ)8B reaction plays a central role in the evaluation of solar neutrino fluxes. We report on a new precision measurement of the cross section of this reaction, following our previous experiment with an implanted 7Be target, a raster-scanned beam, and the elimination of backscattering losses. The new measurement incorporates a higher activity 7Be target and a number of improvements in design and procedure. The cross section at a selected energy Ec.m. = 850 keV (where c.m. stands for center of mass) was measured several times under varying experimental conditions, yielding a value of S17(E c.m. = 850 keV) = 24.0±0.5 eV b, to serve as a benchmark. Measurements were carried out at lower energies as well. Due to the precise knowledge of the implanted 7Be density profile, it was possible to reconstitute both the off- and on-resonance parts of the cross section and to obtain from the entire set of measurements an extrapolated value of S 17(0) = 21.2±0.7 eV b, using the cluster model of Descouvemont and Baye.

UR - http://www.scopus.com/inward/record.url?scp=0042261881&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.67.065805

DO - 10.1103/PhysRevC.67.065805

M3 - Article

AN - SCOPUS:0042261881

SN - 0556-2813

VL - 67

SP - 658051

EP - 6580514

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 6

M1 - 065805

ER -

New measurement of the proton capture rate on ⁷Be and the S ₁₇(0) factor

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this