A new evaluation of the neutron data standards

¹ National Institute of Standards and Technology, 100 Bureau Dr. Stop 8463, Gaithersburg, MD 20899-8463, USA
² Atomsrandart, Rosatom State Corporation, Moscow, Russia
³ Los Alamos National Laboratory, Los Alamos, NM 87545, USA
⁴ Tsinghua University, Beijing 100084, China
⁵ NAPC-Nuclear Data Section, International Atomic Energy Agency, Vienna, Austria
⁶ Facultad de Fisica, Universidad de Santiago de Compostela, Santiago de Compostela, La Coruña 15782, Spain
⁷ EC-JRC-Dir. G, Unit G.2, Retieseweg 111, 2440 Geel, Belgium
⁸ Nuclear Data Center, Japan Atomic Energy Agency, 2-4 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
⁹ Neutron Metrology Group, Physikalisch-Technische Bundesanstalt, Org. 6.4, Bundesallee 100, 38116 Braunschweig, Germany
¹⁰ SPRC/LEPh, CEA Cadarache, 13108 Saint Paul Les Durance, France
¹¹ Argonne Associate of Seville, Coronado, CA, USA
¹² China Nuclear Data Center (CNDC), China Institute of Atomic Energy, PO Box 275(41), Beijing 102413, China
¹³ Research School of Physics and Engineering, The Australian National University, Nuclear Physics ACT 0200, Canberra, Australia
¹⁴ Now at Uppsala University, Box 256, 751 05 Uppsala, Sweden
¹⁵ Now at Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany

^a e-mail: carlson@nist.gov

Published online: 13 September 2017

Abstract

Evaluations are being done for the H(n,n), ⁶Li(n,t), ¹⁰B(n,αγ), ¹⁰B(n,α), C(n,n), Au(n,γ), ²³⁵U(n,f) and ²³⁸U(n,f) standard cross sections. Evaluations are also being done for data that are not traditional standards including: the Au(n,γ) cross section at energies below where it is considered a standard; reference cross sections for prompt gamma-ray production in fast neutron-induced reactions; reference cross sections for very high energy fission cross sections; the ²³⁵U thermal neutron fission spectrum and the ²⁵²Cf spontaneous fission neutron spectrum and the thermal constants.