Neutron Interactions with He-3 Revisited-II: Nonelastic Cross Sections in the Mega-Electron-Volt Range

Autor(en)

M. Drosg, P. W. Lisowski

Abstrakt

Reliable nonelastic cross-section measurements of fast neutrons with ³He are sparse. In the energy range up to 40 MeV, the data are dominated by unpublished nonelastic n-³He values derived from measurements made in 1982. As mentioned elsewhere, n-³He

elastic cross-section data reported in the same report had not been

corrected for the outgoing neutron attenuation even though the sample

size was >7 mol. To check the database of existing nonelastic n-³He

cross-section data, and in particular those from 1982, a detailed

balance calculation of time-reversed charged-particle data was

performed. Because there are few existing independent data, we provide

an updated detailed balance analysis in the energy range up to 31 MeV

for both ³He(n,p)³H and ³He(n,d)²H,

supplying accurate absolute-angle-dependent differential cross

sections. Subtracting the integrals of these and the elastic cross

sections from the total provides a prediction for the sum of the ³He(n,2n)2p and ³He(n,n + p)²H cross sections. The relevant experimental data are compared with their time-reversed counterparts.

Organisation(en)

Aerosolphysik und Umweltphysik

Externe Organisation(en)

Los Alamos National Laboratory

Journal

Nuclear Science and Engineering: research and development related to peaceful utilization of nuclear energy

Band

175

Seiten

19-27

Anzahl der Seiten

9

ISSN

0029-5639

DOI

https://doi.org/10.13182/NSE12-7

Publikationsdatum

09-2013

Peer-reviewed

Ja

ÖFOS 2012

103005 Atomphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/4a830b16-a969-454e-b611-b1c959917618