Informing direct neutron capture on tin isotopes near the N=82 shell closure

Manning, B.; Arbanas, G.; Cizewski, J. A.; Kozub, R. L.; Ahn, S.; Allmond, J. M.; Bardayan, D. W.; Chae, K. Y.; Chipps, K. A.; Howard, M. E.; Jones, K. L.; Liang, J. F.; Matos, M.; Nesaraja, C. D.; Nunes, F. M.; O'Malley, P. D.; Pain, S. D.; Peters, W. A.; Pittman, S. T.; Ratkiewicz, A.; Schmitt, K. T.; Shapira, D.; Smith, M. S.; Titus, L.

doi:10.1103/PhysRevC.99.041302

Title: Informing direct neutron capture on tin isotopes near the $N = 82$ shell closure

Journal Article · Thu Apr 18 00:00:00 EDT 2019 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.99.041302· OSTI ID:1564107

Manning, B. ^[1]; Arbanas, G. ^[2]; Cizewski, J. A. ^[3]; Kozub, R. L. ^[4]; Ahn, S. ^[5]; Allmond, J. M. ^[6]; Bardayan, D. W. ^[7]; Chae, K. Y. ^[8]; Chipps, K. A. ^[9]; Howard, M. E. ^[3]; Jones, K. L. ^[10]; Liang, J. F. ^[6]; Matos, M. ^[11]; Nesaraja, C. D. ^[6]; Nunes, F. M. ^[12]; O'Malley, P. D. ^[13]; Pain, S. D. ^[6]; Peters, W. A. ^[14]; Pittman, S. T. ^[15]; Ratkiewicz, A. ^[3] more »

Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy; Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Physics Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Reactor and Nuclear Systems Division
Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy
Tennessee Technological Univ., Cookeville, TN (United States). Dept. of Physics
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy, and JINA-CEE
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Notre Dame, IN (United States). Dept. of Physics
Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Physics
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Colorado School of Mines, Golden, CO (United States). Dept. of Physics
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy; Univ. of Notre Dame, IN (United States). Dept. of Physics
Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge Associated Univ., Oak Ridge, TN (United States)

Half of the elements heavier than iron are believed to be produced through the rapid neutron-capture process ($$r$$-process). The astrophysical environment(s) where the $$r$$-process occurs remains an open question, even after recent observations of neutron-star mergers and the associated kilonova. Features in the abundance pattern of $$r$$-process ashes may provide critical insight for distinguishing contributions from different possible sites, including neutron-star mergers and core-collapse supernovae. In particular, the largely unknown neutron-capture reaction rates on neutron-rich unstable nuclei near ¹³²Sn could have a significant impact on the final $$r$$-process abundances. To better determine these neutron-capture rates, the ($d,p$) reaction has been measured in inverse kinematics using radioactive ion beams of ¹²⁶Sn and ¹²⁸Sn and a stable beam of ¹²⁴Sn interacting with a (CD₂)$$_n$$ target. An array of position-sensitive silicon strip detectors, including the Super Oak Ridge Rutgers University Barrel Array, was used to detect light reaction products. In addition to the present measurements, previous measurements of ^130,132Sn($d,p$) were reanalyzed using state-of-the-art reaction theory to extract a consistent set of spectroscopic factors for ($d,p$) reactions on even tin nuclei between the heaviest stable isotope ¹²⁴Sn and doubly magic ¹³²Sn. The spectroscopic information was used to calculate direct-semidirect ($n,γ$) cross sections, which will serve as important input for r-process abundance calculations.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725; FG52-08NA28552; NA0002132; FG02-96ER40983; SC0001174; FG02-96ER40955

OSTI ID:: 1564107

Alternate ID(s):: OSTI ID: 1507606

Journal Information:: Physical Review C, Vol. 99, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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Title: Informing direct neutron capture on tin isotopes near the $N = 82$ shell closure