Measurement of the D(n,2n)p reaction cross section up to 30 MeV

Abstract

Abstract. This article presents a running experimental program to measure the neutron-induced deuteron break-up reaction between 5 and 10 MeV, and between 20 and 30 MeV. The measurements are performed with a C 6 D 6 detector as deuteron target placed in a beam line of the Tandem 7MV accelerator at Bruyères-le-Châtel, France, dedicated to the use of a 4π neutron detector which allows to measure the two emitted neutrons. This experimental work is done in parallel with an ab initio calculation of the reaction which is sum up in the text. Comparisons to the measured cross section are done together with CENDL2 and ENDF/B-VII evaluations.

A Different Cosmology—Thoughts from Outside the Box

“…Comparing with (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), we see that the Ricci scalar varies as [ ] [ ]…”

“…We start with the difference between (8-8a) and (8-8b) and perform a series of transformations to get the result into its final form. First, we make replacements using (8-13), (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) and their derivatives. Next, we make a change of variable to η defined by 0 e ct ct η = followed by a change of radial coordinate to a scaled coordinate defined by ( ) s h r r r ct = which ranges from 0 to 1.…”

“…For the remainder of this development, it will be useful to have a summary of the various quantities we have been discussing. The scaling is given by (8-24)- (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) with the following parameters The scaling curves are shown in Figure 3. The pair of values under the "Particles" are the values corresponding to the dense and void regions (upper and lower) respectively.…”

“…The function, ( ) 2 h ξ is negative reflecting the fact that the net force is towards the center of the galaxy. In order to have stability, the net force on a test particle at location r must vanish so [14][15][16][17][18][19][20][21] and from this, we obtain the following constraint on the vacuum energy density,…”

“…After the source is cut off, the pressure does not immediately vanish but instead decays over a period of time during which it acts as a source adding more energy to the curvature. This energy must be included in the final total and consequently the actual source cutoff must occur at a somewhat smaller value of α than indicated by (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21).…”