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Title: Low-energy cross section of the {sup 7}Be(p,{gamma}){sup 8}B solar fusion reaction from the Coulomb dissociation of {sup 8}B

Abstract

An exclusive measurement of the Coulomb breakup of {sup 8}B into {sup 7}Be+p at 254A MeV was used to infer the low-energy {sup 7}Be(p,{gamma}){sup 8}B cross section. The radioactive {sup 8}B beam was produced by projectile fragmentation of 350A MeV {sup 12}C and separated with the FRagment Separator (FRS) at Gesellschaft fuer Schwerionenforschung in Darmstadt, Germany. The Coulomb-breakup products were momentum-analyzed in the KaoS magnetic spectrometer; particular emphasis was placed on the angular correlations of the breakup particles. These correlations demonstrate clearly that E1 multipolarity dominates within the angular cuts selected for the analysis. The deduced astrophysical S{sub 17} factors exhibit good agreement with the most recent direct {sup 7}Be(p,{gamma}){sup 8}B measurements. By using the energy dependence of S{sub 17} according to the recently refined cluster model for {sup 8}B of P. Descouvemont [Phys. Rev. C 70, 065802 (2004)], we extract a zero-energy S factor of S{sub 17}(0)=20.6{+-}0.8(stat){+-}1.2(syst) eV b. These errors do not include the uncertainty of the theoretical model to extrapolate to zero relative energy, estimated by Descouvemont to be about 5%.

Authors:
;  [1]; ; ; ; ; ; ; ; ; ;  [2]; ;  [2];  [3]; ; ;  [4]; ;  [5] more »;  [6] « less
  1. Institut fuer Physik mit Ionenstrahlen, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany)
  2. Gesellschaft fuer Schwerionenforschung, D-64220 Darmstadt (Germany)
  3. (Germany)
  4. Phillips-Universitaet Marburg, D-35032 Marburg (Germany)
  5. Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)
  6. University of Connecticut, Groton, Connecticut 06340 (United States) (and others)
Publication Date:
OSTI Identifier:
20771235
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.73.015806; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR CORRELATION; BORON 8; CAPTURE; CARBON 12; CLUSTER MODEL; COSMIC NEUTRINOS; CROSS SECTIONS; DISSOCIATION; ENERGY DEPENDENCE; LITHIUM 7 TARGET; MEV RANGE; NUCLEAR FRAGMENTATION; PROTON REACTIONS

Citation Formats

Schuemann, F., Strieder, F., Typel, S., Hammache, F., Suemmerer, K., Cortina, D., Geissel, H., Koczon, P., Kurz, N., Schwab, E., Senger, P., Sun Zhiyu, Uhlig, F., Sturm, C., Technische Universitaet Darmstadt, D-64289 Darmstadt, Boettcher, I., Kohlmeyer, B., Menzel, M., Foerster, A., Oeschler, H., and Gai, M. Low-energy cross section of the {sup 7}Be(p,{gamma}){sup 8}B solar fusion reaction from the Coulomb dissociation of {sup 8}B. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.015806.
Schuemann, F., Strieder, F., Typel, S., Hammache, F., Suemmerer, K., Cortina, D., Geissel, H., Koczon, P., Kurz, N., Schwab, E., Senger, P., Sun Zhiyu, Uhlig, F., Sturm, C., Technische Universitaet Darmstadt, D-64289 Darmstadt, Boettcher, I., Kohlmeyer, B., Menzel, M., Foerster, A., Oeschler, H., & Gai, M. Low-energy cross section of the {sup 7}Be(p,{gamma}){sup 8}B solar fusion reaction from the Coulomb dissociation of {sup 8}B. United States. doi:10.1103/PhysRevC.73.015806.
Schuemann, F., Strieder, F., Typel, S., Hammache, F., Suemmerer, K., Cortina, D., Geissel, H., Koczon, P., Kurz, N., Schwab, E., Senger, P., Sun Zhiyu, Uhlig, F., Sturm, C., Technische Universitaet Darmstadt, D-64289 Darmstadt, Boettcher, I., Kohlmeyer, B., Menzel, M., Foerster, A., Oeschler, H., and Gai, M. Sun . "Low-energy cross section of the {sup 7}Be(p,{gamma}){sup 8}B solar fusion reaction from the Coulomb dissociation of {sup 8}B". United States. doi:10.1103/PhysRevC.73.015806.
@article{osti_20771235,
title = {Low-energy cross section of the {sup 7}Be(p,{gamma}){sup 8}B solar fusion reaction from the Coulomb dissociation of {sup 8}B},
author = {Schuemann, F. and Strieder, F. and Typel, S. and Hammache, F. and Suemmerer, K. and Cortina, D. and Geissel, H. and Koczon, P. and Kurz, N. and Schwab, E. and Senger, P. and Sun Zhiyu and Uhlig, F. and Sturm, C. and Technische Universitaet Darmstadt, D-64289 Darmstadt and Boettcher, I. and Kohlmeyer, B. and Menzel, M. and Foerster, A. and Oeschler, H. and Gai, M.},
abstractNote = {An exclusive measurement of the Coulomb breakup of {sup 8}B into {sup 7}Be+p at 254A MeV was used to infer the low-energy {sup 7}Be(p,{gamma}){sup 8}B cross section. The radioactive {sup 8}B beam was produced by projectile fragmentation of 350A MeV {sup 12}C and separated with the FRagment Separator (FRS) at Gesellschaft fuer Schwerionenforschung in Darmstadt, Germany. The Coulomb-breakup products were momentum-analyzed in the KaoS magnetic spectrometer; particular emphasis was placed on the angular correlations of the breakup particles. These correlations demonstrate clearly that E1 multipolarity dominates within the angular cuts selected for the analysis. The deduced astrophysical S{sub 17} factors exhibit good agreement with the most recent direct {sup 7}Be(p,{gamma}){sup 8}B measurements. By using the energy dependence of S{sub 17} according to the recently refined cluster model for {sup 8}B of P. Descouvemont [Phys. Rev. C 70, 065802 (2004)], we extract a zero-energy S factor of S{sub 17}(0)=20.6{+-}0.8(stat){+-}1.2(syst) eV b. These errors do not include the uncertainty of the theoretical model to extrapolate to zero relative energy, estimated by Descouvemont to be about 5%.},
doi = {10.1103/PhysRevC.73.015806},
journal = {Physical Review. C, Nuclear Physics},
number = 1,
volume = 73,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}