Energy dependence of the astrophysical S factor for the6Li(p, γ)7Be reaction

R. M. Prior; M. C. Spraker; A. M. Amthor; K. J. Keeter; S. O. Nelson; A. Sabourov; K. Sabourov; A. Tonchev; M. Ahmed; J. H. Kelley; D. R. Tilley; H. R. Weller; H. M. Hofmann

doi:10.1103/PhysRevC.70.055801

Energy dependence of the astrophysical S factor for the⁶Li(p, γ)⁷Be reaction

R. M. Prior
, M. C. Spraker
, A. M. Amthor
, K. J. Keeter
, S. O. Nelson
, A. Sabourov
, K. Sabourov
, A. Tonchev
, M. Ahmed
, J. H. Kelley
, D. R. Tilley
, H. R. Weller
, H. M. Hofmann

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

24 Scopus citations

Abstract

Polarized proton beams with energies from 80 to 130 keV have been used to determine the slope of the astrophysical S factor for the ⁶Li(p, γ,₀)⁷Be and ⁶Li(p,γ₁) ⁷Be reactions. The slope was determined from the relative yields at five incident proton energies. The slope of the S factor was found to be negative. The analyzing power measurements indicate that the reaction proceeds predominately by s-wave capture. The negative slope does not appear to be due to low-binding-energy effects, the effects of nearby resonances, or electron screening of the nuclei. A resonating group model calculation demonstrates a new mechanism for producing a negative slope at astrophysically relevant energies in radiative capture reactions.

Original language	English
Article number	055801
Pages (from-to)	055801-1-055801-8
Journal	Physical Review C - Nuclear Physics
Volume	70
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.70.055801
State	Published - Nov 2004
Externally published	Yes

Funding

This work was partially supported by grants from the U.S. Department of Energy under Grants Nos. DE-FG02-97ER41046, DE-FG02-97ER41033, and DE-FG02-97ER41042.

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10.1103/PhysRevC.70.055801

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Prior, R. M., Spraker, M. C., Amthor, A. M., Keeter, K. J., Nelson, S. O., Sabourov, A., Sabourov, K., Tonchev, A., Ahmed, M., Kelley, J. H., Tilley, D. R., Weller, H. R., & Hofmann, H. M. (2004). Energy dependence of the astrophysical S factor for the⁶Li(p, γ)⁷Be reaction. Physical Review C - Nuclear Physics, 70(5), 055801-1-055801-8. Article 055801. https://doi.org/10.1103/PhysRevC.70.055801

@article{9d67dd71545c4fb3a609770b9aedc52a,

title = "Energy dependence of the astrophysical S factor for the6Li(p, γ)7Be reaction",

abstract = "Polarized proton beams with energies from 80 to 130 keV have been used to determine the slope of the astrophysical S factor for the 6Li(p, γ,0)7Be and 6Li(p,γ1) 7Be reactions. The slope was determined from the relative yields at five incident proton energies. The slope of the S factor was found to be negative. The analyzing power measurements indicate that the reaction proceeds predominately by s-wave capture. The negative slope does not appear to be due to low-binding-energy effects, the effects of nearby resonances, or electron screening of the nuclei. A resonating group model calculation demonstrates a new mechanism for producing a negative slope at astrophysically relevant energies in radiative capture reactions.",

author = "Prior, \{R. M.\} and Spraker, \{M. C.\} and Amthor, \{A. M.\} and Keeter, \{K. J.\} and Nelson, \{S. O.\} and A. Sabourov and K. Sabourov and A. Tonchev and M. Ahmed and Kelley, \{J. H.\} and Tilley, \{D. R.\} and Weller, \{H. R.\} and Hofmann, \{H. M.\}",

year = "2004",

month = nov,

doi = "10.1103/PhysRevC.70.055801",

language = "English",

volume = "70",

pages = "055801--1--055801--8",

journal = "Physical Review C - Nuclear Physics",

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Prior, RM, Spraker, MC, Amthor, AM, Keeter, KJ, Nelson, SO, Sabourov, A, Sabourov, K, Tonchev, A, Ahmed, M, Kelley, JH, Tilley, DR, Weller, HR & Hofmann, HM 2004, 'Energy dependence of the astrophysical S factor for the⁶Li(p, γ)⁷Be reaction', Physical Review C - Nuclear Physics, vol. 70, no. 5, 055801, pp. 055801-1-055801-8. https://doi.org/10.1103/PhysRevC.70.055801

TY - JOUR

T1 - Energy dependence of the astrophysical S factor for the6Li(p, γ)7Be reaction

AU - Prior, R. M.

AU - Spraker, M. C.

AU - Amthor, A. M.

AU - Keeter, K. J.

AU - Nelson, S. O.

AU - Sabourov, A.

AU - Sabourov, K.

AU - Tonchev, A.

AU - Ahmed, M.

AU - Kelley, J. H.

AU - Tilley, D. R.

AU - Weller, H. R.

AU - Hofmann, H. M.

PY - 2004/11

Y1 - 2004/11

N2 - Polarized proton beams with energies from 80 to 130 keV have been used to determine the slope of the astrophysical S factor for the 6Li(p, γ,0)7Be and 6Li(p,γ1) 7Be reactions. The slope was determined from the relative yields at five incident proton energies. The slope of the S factor was found to be negative. The analyzing power measurements indicate that the reaction proceeds predominately by s-wave capture. The negative slope does not appear to be due to low-binding-energy effects, the effects of nearby resonances, or electron screening of the nuclei. A resonating group model calculation demonstrates a new mechanism for producing a negative slope at astrophysically relevant energies in radiative capture reactions.

AB - Polarized proton beams with energies from 80 to 130 keV have been used to determine the slope of the astrophysical S factor for the 6Li(p, γ,0)7Be and 6Li(p,γ1) 7Be reactions. The slope was determined from the relative yields at five incident proton energies. The slope of the S factor was found to be negative. The analyzing power measurements indicate that the reaction proceeds predominately by s-wave capture. The negative slope does not appear to be due to low-binding-energy effects, the effects of nearby resonances, or electron screening of the nuclei. A resonating group model calculation demonstrates a new mechanism for producing a negative slope at astrophysically relevant energies in radiative capture reactions.

UR - https://www.scopus.com/pages/publications/12344259464

U2 - 10.1103/PhysRevC.70.055801

DO - 10.1103/PhysRevC.70.055801

M3 - Article

AN - SCOPUS:12344259464

SN - 0556-2813

VL - 70

SP - 055801-1-055801-8

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 5

M1 - 055801

ER -

Energy dependence of the astrophysical S factor for the⁶Li(p, γ)⁷Be reaction

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