Title: Measurement of the ${}^{10}\mathrm{B}(\alpha ,n_0){}^{13}\mathrm{N}$ cross section for $2.2<E_{\alpha }<4.9\mathrm{MeV}$ and its application as a diagnostic at the National Ignition Facility

Abstract

We present that the National Ignition Facility (NIF) provides the opportunity to study nuclear reactions under controlled conditions at high temperatures and pressures at a level never before achieved. However, the timescale of the deuterium-tritium (DT) implosion is only a few nanoseconds, making data collection and diagnostics very challenging. One method that has been proposed for obtaining additional information about the conditions of the implosion is to activate a dopant material using the α particles produced from the DT fuel as a diagnostic. The yield of the activated material can give a measure of the mixing that occurs in the capsule. One of the reactions that has been proposed is ¹⁰B(α,n)¹³N as it produces a radioactive reactant product with a convenient half-life of ≈10 min. Although this reaction has several advantages for the application at hand, it has not seen much study in the present literature, resulting in large uncertainties in the cross section. Furthermore, for the current application, the cross section must be well characterized. With this motivation, the ¹⁰B(α,n)¹³N cross section has been remeasured for 2.2 < E_α < 4.9MeV with the angle-integrated ground-state cross section reported for the first time. Lastly, the present results, combined with previousmore » measurements, allow for a determination of the cross section to a significantly higher degree of accuracy and precision than obtained previously and are shown to be consistent with thick-target measurements. Preliminary calculations are performed to test the feasibility of this reaction as a diagnostic for a NIF implosion.« less

Authors:

Liu, Qian ^[1]; Febbraro, Michael T.  ^[2];

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deBoer, R J. ^[1]; Boeltzig, Axel ^[1]; Chen, Y. ^[1]; Cerjan, C. ^[3]; Couder, Manoel ^[1]; Frentz, Brent ^[1]; Gorres, Jochim ^[1]; Henry, E. A. ^[3]; Lamere, Ed ^[1]; Macon, Kevin T. ^[4]; Manukyan, Khachatur V. ^[1]; Morales, Luis ^[1]; O'Malley, P. D. ^[1]; Pain, Steven D.  ^[2];

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Peters, William A. ^[2]; Schneider, D. ^[3]; Seymour, Christopher ^[1]; Seymour, Gwen ^[1] more »; Temanson, Eli S. ^[2]; Toomey, Rebecca ^[5]; Kolk, B. Vande ^[1]; Weaver, Jamie ^[6]; Wiescher, Michael ^[1] « less

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+ Show Author Affiliations

1. Univ. of Notre Dame, IN (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
4. Univ. of Notre Dame, IN (United States); Louisiana State Univ., Baton Rouge, LA (United States)
5. Rutgers Univ., New Brunswick, NJ (United States)
6. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)

Publication Date:

2019-09-03

Research Org.:

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

Sponsoring Org.:

USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1561661

Alternate Identifier(s):

OSTI ID: 1560314

Grant/Contract Number:  

AC05-00OR22725; AC52-07NA27344; NA0002132

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review C

Additional Journal Information:

Journal Volume: 100; Journal Issue: 3; Journal ID: ISSN 2469-9985

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

73 NUCLEAR PHYSICS AND RADIATION PHYSICS