Pu236(n,f) , Pu237(n,f) , and Pu238(n,f) cross sections deduced from (p,t) , (p,d) , and (p,p′) surrogate reactions

Top Quark Theoretical Cross Sections and pT and Rapiditiy Distributions

State-to-state differential cross sections from photoinitiated bulb reactions

We consider a mixture of a diatomic photolytic precursor AX and a reagent BC that undergoes the photoinitiated reaction AX+ hu+A+X followed by A+BC+AB+C. In the limit that AX is stationary relative to BC, we show that the threedimensional velocity distribution of the AB product in a specified quantum state can be related to the differential cross section of the A+BC reaction by a simple, invert...

Neutron Cross Sections for Some Threshold Reactions

Three neutron reactions leading to production of the rare gases Ar41 and Xe135 have been in­ vestigated. Single crystal samples of KF, CaF2 , and BaF2 were irradiated in the Berlin reactor and the target-free absolute activities of the rare gas isotopes measured by a /^-/-coincidence method. The calculated cross sections are K41 (n,p)Ar41: o = ( 2 ,73±0,41) mb; o0= (98,6± 14,8) mb; Ca44(n,a)Ar4...

Cross sections for meson-meson nonresonant reactions

Meson-meson nonresonant reactions governed by the quark-interchange mechanism are studied in a potential that is derived from QCD. S-wave elastic phase shifts for I = 2 ππ and I = 3/2 Kπ scattering are obtained with wave functions determined by the central spin-independent term of the potential. The reactions include inelastic scatterings of two mesons in the ground-state pseudoscalar octet and...

Determining neutron-capture cross sections via the surrogate reaction technique

Indirect methods play an important role in the determination of nuclear reaction cross sections that are hard to measure directly. In this paper we investigate the feasibility of using the so-called surrogate method to extract neutron-capture cross sections for low energy compound-nuclear reactions in spherical and near-spherical nuclei. We present the surrogate method and develop a statistical...