DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement of the Li 7 ( γ , t ) He 4 ground-state cross section between E γ = 4.4 and 10 MeV

Abstract

Here, the Li 7 ( γ , t ) He 4 ground state cross section was measured for the first time using monoenergetic γ rays with energies between 4.4 and 10 MeV at the High Intensity Gamma-ray Source. The reaction is important for the primordial Li problem and for testing our understanding of the mirror α -capture reactions H 3 ( α , γ ) Li 7 and He 3 ( α , γ ) Be 7 . Although over the last 30 years most measurements of the H 3 ( α , γ ) Li 7 reaction have concentrated in an energy range below E γ = 3.65 MeV, measurements at higher energies could potentially restrict the extrapolation to astrophysically important energies. The experimental arrangement for measuring the Li 7 ( γ , t ) He 4 reaction included a large-area silicon detector array and several beam characterization instruments. The experimental astrophysical S factor of H 3 ( α , γ ) calculated from the present data was fitted using the R -matrix formalism. The results are in disagreement with previous experimental measurements in the same energy range but the extrapolated S factor agrees with the potential model calculation and lower energy experimental data.

Authors:
 [1]; ORCiD logo [2];  [3];  [3];  [3];  [4];  [5];  [2];  [2];  [6];  [7];  [2];  [8];  [9];  [10];  [5];  [10];  [10];  [11];  [2] more »;  [11];  [11];  [2];  [2];  [2] « less
  1. Aarhus Univ. (Denmark). Dept. of Physics and Astronomy; Univ. of York (United Kingdom). Dept. of Physics
  2. Horia Hulubei National Inst. for R&D in Physics and Nuclear Engineering, Bucharest-Magurele (Romania). Extreme Light Infrastructure - Nuclear Physics
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Physics; Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory
  5. Univ. of York (United Kingdom). Dept. of Physics
  6. Horia Hulubei National Inst. for R&D in Physics and Nuclear Engineering, Bucharest-Magurele (Romania). Extreme Light Infrastructure - Nuclear Physics; Istituto Nazionale di Fisica Nucleare (INFN), Catania (Italy). Lab. Nazionali del Sud (INFN-LNS)
  7. Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy
  8. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  9. Ohio Univ., Athens, OH (United States)
  10. Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Physics
  11. Istituto Nazionale di Fisica Nucleare (INFN), Catania (Italy). Lab. Nazionali del Sud (INFN-LNS)
Publication Date:
Research Org.:
University of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA); European Research Council (ERC); National Science Foundation (NSF); Science and Technology Facilities Council (STFC) (United Kingdom); National Research Foundation of Korea (NRF)
OSTI Identifier:
1658871
Grant/Contract Number:  
FG02-97ER41033; FG02-97ER41041; AC05-00OR22725; FG02-88ER40387; NA0003883; NA0002132; LOEBNA-307447; PHY-1404218; ST/P003885/1; ST/L005727/1; NRF-2016R1A5A1013277; NRF-2018M7A1A1072274
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 101; Journal Issue: 5; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; big bang nucleosynthesis; photonuclear reactions; nuclear data analysis & compilation; radiation detectors

Citation Formats

Munch, M., Matei, C., Pain, S. D., Febbraro, M. T., Chipps, K. A., Karwowski, H. J., Diget, C. Aa., Pappalardo, A., Chesnevskaya, S., Guardo, G. L., Walter, D., Balabanski, D. L., Becchetti, F. D., Brune, C. R., Chae, K. Y., Frost-Schenk, J., Kim, M. J., Kwag, M. S., La Cognata, M., Lattuada, D., Pizzone, R. G., Rapisarda, G. G., Turturica, G. V., Ur, C. A., and Xu, Y.. Measurement of the Li7(γ,t)He4 ground-state cross section between Eγ=4.4 and 10 MeV. United States: N. p., 2020. Web. doi:10.1103/physrevc.101.055801.
Munch, M., Matei, C., Pain, S. D., Febbraro, M. T., Chipps, K. A., Karwowski, H. J., Diget, C. Aa., Pappalardo, A., Chesnevskaya, S., Guardo, G. L., Walter, D., Balabanski, D. L., Becchetti, F. D., Brune, C. R., Chae, K. Y., Frost-Schenk, J., Kim, M. J., Kwag, M. S., La Cognata, M., Lattuada, D., Pizzone, R. G., Rapisarda, G. G., Turturica, G. V., Ur, C. A., & Xu, Y.. Measurement of the Li7(γ,t)He4 ground-state cross section between Eγ=4.4 and 10 MeV. United States. https://doi.org/10.1103/physrevc.101.055801
Munch, M., Matei, C., Pain, S. D., Febbraro, M. T., Chipps, K. A., Karwowski, H. J., Diget, C. Aa., Pappalardo, A., Chesnevskaya, S., Guardo, G. L., Walter, D., Balabanski, D. L., Becchetti, F. D., Brune, C. R., Chae, K. Y., Frost-Schenk, J., Kim, M. J., Kwag, M. S., La Cognata, M., Lattuada, D., Pizzone, R. G., Rapisarda, G. G., Turturica, G. V., Ur, C. A., and Xu, Y.. Thu . "Measurement of the Li7(γ,t)He4 ground-state cross section between Eγ=4.4 and 10 MeV". United States. https://doi.org/10.1103/physrevc.101.055801. https://www.osti.gov/servlets/purl/1658871.
@article{osti_1658871,
title = {Measurement of the Li7(γ,t)He4 ground-state cross section between Eγ=4.4 and 10 MeV},
author = {Munch, M. and Matei, C. and Pain, S. D. and Febbraro, M. T. and Chipps, K. A. and Karwowski, H. J. and Diget, C. Aa. and Pappalardo, A. and Chesnevskaya, S. and Guardo, G. L. and Walter, D. and Balabanski, D. L. and Becchetti, F. D. and Brune, C. R. and Chae, K. Y. and Frost-Schenk, J. and Kim, M. J. and Kwag, M. S. and La Cognata, M. and Lattuada, D. and Pizzone, R. G. and Rapisarda, G. G. and Turturica, G. V. and Ur, C. A. and Xu, Y.},
abstractNote = {Here, the Li7(γ,t)He4 ground state cross section was measured for the first time using monoenergetic γ rays with energies between 4.4 and 10 MeV at the High Intensity Gamma-ray Source. The reaction is important for the primordial Li problem and for testing our understanding of the mirror α-capture reactions H3(α,γ)Li7 and He3(α,γ)Be7. Although over the last 30 years most measurements of the H3(α,γ)Li7 reaction have concentrated in an energy range below Eγ=3.65 MeV, measurements at higher energies could potentially restrict the extrapolation to astrophysically important energies. The experimental arrangement for measuring the Li7(γ,t)He4 reaction included a large-area silicon detector array and several beam characterization instruments. The experimental astrophysical S factor of H3(α,γ) calculated from the present data was fitted using the R-matrix formalism. The results are in disagreement with previous experimental measurements in the same energy range but the extrapolated S factor agrees with the potential model calculation and lower energy experimental data.},
doi = {10.1103/physrevc.101.055801},
journal = {Physical Review C},
number = 5,
volume = 101,
place = {United States},
year = {2020},
month = {5}
}

Works referenced in this record:

The Primordial Lithium Problem
journal, November 2011


Energy levels of light nuclei A = 5−10
journal, December 1988


NACRE II: an update of the NACRE compilation of charged-particle-induced thermonuclear reaction rates for nuclei with mass number <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:mi>A</mml:mi><mml:mo><</mml:mo><mml:mn>16</mml:mn></mml:math>
journal, November 2013


Elastic scattering of several hydrogen and helium isotopes from tritium
journal, March 1968


New measurement of the 3 He( α , γ ) 7 Be cross section at medium energies
journal, September 2012


Photon flux monitor for a mono-energetic gamma ray source
journal, July 2009

  • Pywell, R. E.; Mavrichi, O.; Wurtz, W. A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 606, Issue 3
  • DOI: 10.1016/j.nima.2009.04.014

Estimating reaction rates and uncertainties for primordial nucleosynthesis
journal, May 2000


Investigation of the d(γ,n)p reaction for gamma beam monitoring at ELI-NP
journal, May 2016


Destruction of 18 F via 18 F ( p , α ) 15 O burning through the E c . m . = 665 keV resonance
journal, May 2001


He 3 ( α , γ ) Be 7 and H 3 ( α , γ ) Li 7 astrophysical S factors from the no-core shell model with continuum
journal, June 2016


Energy levels of light nuclei A=5, 6, 7
journal, September 2002


An update on the big bang nucleosynthesis prediction for 7 Li: the problem worsens
journal, November 2008

  • Cyburt, Richard H.; Fields, Brian D.; Olive, Keith A.
  • Journal of Cosmology and Astroparticle Physics, Vol. 2008, Issue 11
  • DOI: 10.1088/1475-7516/2008/11/012

The photodisintegration of6Li and7Li
journal, December 1979

  • Junghans, G.; Bangert, K.; Berg, U. E. P.
  • Zeitschrift f�r Physik A: Atoms and Nuclei, Vol. 291, Issue 4
  • DOI: 10.1007/BF01408386

New Precision Measurement of the H e 3 ( H e 4 , γ ) B e 7 Cross Section
journal, December 2004


Photoneutron reaction cross section measurements on Mo 94 and Zr 90 relevant to the p -process nucleosynthesis
journal, February 2019


Dipole polarizability of Li 7 from precision measurement of the elastic scattering on Pb 208 below the Coulomb barrier
journal, August 2008


Stellar and Primordial Nucleosynthesis of Be 7 : Measurement of He 3 ( α , γ ) Be 7
journal, June 2009


Photoneutron Cross Sections for Au Revisited: Measurements with Laser Compton Scattering γ-Rays and Data Reduction by a Least-Squares Method
journal, May 2011

  • Itoh, Osamu; Utsunomiya, Hiroaki; Akimune, Hidetoshi
  • Journal of Nuclear Science and Technology, Vol. 48, Issue 5
  • DOI: 10.1080/18811248.2011.9711766

Investigation of Compton scattering for gamma beam intensity measurements and perspectives at ELI-NP
journal, March 2019

  • Turturica, G. V.; Matei, C.; Pappalardo, A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 921
  • DOI: 10.1016/j.nima.2018.12.048

Table of nuclear moments
journal, July 1989


Standard big bang nucleosynthesis and primordial CNO abundances after Planck
journal, October 2014

  • Coc, Alain; Uzan, Jean-Philippe; Vangioni, Elisabeth
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 10
  • DOI: 10.1088/1475-7516/2014/10/050

E1 polarizability of Li 7 and astrophysical S factor for He 4 (t, γ ) 7 Li
journal, February 1988

  • Kajino, Toshitaka; Bertsch, George F.; Kubo, Ken-ichi
  • Physical Review C, Vol. 37, Issue 2
  • DOI: 10.1103/PhysRevC.37.512

SRIM – The stopping and range of ions in matter (2010)
journal, June 2010

  • Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12
  • DOI: 10.1016/j.nimb.2010.02.091

H 3 (α,γ ) 7 Li reaction at low energies
journal, October 1994


Measurement of the (γ, n) cross section of the nucleus 197Au close above the reaction threshold
journal, August 2002


Efficiency measurements of deuterated liquid scintillators using d(d,n)3He coincidence events
journal, October 2011

  • Villano, A. N.; Becchetti, F. D.; Kolata, J. J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 652, Issue 1
  • DOI: 10.1016/j.nima.2010.08.013

Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

Experiment and theory for the reaction Li 7 ( γ , t ) He 4 for E γ < 50 MeV
journal, December 1979


Compilation and R-matrix analysis of Big Bang nuclear reaction rates
journal, September 2004

  • Descouvemont, Pierre; Adahchour, Abderrahim; Angulo, Carmen
  • Atomic Data and Nuclear Data Tables, Vol. 88, Issue 1
  • DOI: 10.1016/j.adt.2004.08.001

Activation Measurement of the He 3 ( α , γ ) Be 7 Cross Section at Low Energy
journal, September 2006


Research opportunities at the upgraded HIγS facility
journal, January 2009

  • Weller, Henry R.; Ahmed, Mohammad W.; Gao, Haiyan
  • Progress in Particle and Nuclear Physics, Vol. 62, Issue 1
  • DOI: 10.1016/j.ppnp.2008.07.001

The metal-poor end of the Spite plateau: I. Stellar parameters, metallicities, and lithium abundances******
journal, October 2010