Neutron scattering kernel for solid deuterium

Granada, J.R.

doi:10.1209/0295-5075/86/66007

Cited by 12 publications

(11 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results were obtained in Ref. [17], with the use of Z(ω) derived from experiments. Different contributions to the total incoherent cross section are shown in Fig.…”

Section: Resultssupporting

confidence: 86%

See 1 more Smart Citation

Cold neutron scattering in imperfect deuterium crystals

Adamczak

2011

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

The differential cross sections for cold neutron scattering in mosaic deuterium crystals have been calculated for various target temperatures. The theoretical results are compared with the recent experimental data for the neutron wavelengths λ ≈ 1-9 Å. It is shown that the structures of observed Bragg peaks can be explained by the mosaic spread of about 3 • and contributions from a limited number of crystal orientations. Such a crystal structure should be also taken into account in ultracold neutron upscattering due to the coherent phonon annihilation in solid deuterium.

show abstract

“…Similar results were obtained in Ref. [17], with the use of Z(ω) derived from experiments. Different contributions to the total incoherent cross section are shown in Fig.…”

Section: Resultssupporting

confidence: 86%

“…Moreover, the observed and calculated locations of the Bragg peaks do not fully coincide. A more advanced calculation of the total cross section for a random polycrystalline sD 2 [17], with incoherent processes taken into account, also disagrees with the experiment in the Bragg-scattering region.…”

Section: Introductionmentioning

confidence: 68%

Cold neutron scattering in imperfect deuterium crystals

Adamczak

2011

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

show abstract

“…The following thermal neutron scattering cross section files were used in addition to the standard MCNP6 distribution: Ref. [37] for ortho-SD 2 at 5 K, Ref. [38] for polyethylene at 5, 77, and 293 K, Ref.…”

mentioning

confidence: 99%

Performance of the upgraded ultracold neutron source at Los Alamos National Laboratory and its implication for a possible neutron electric dipole moment experiment

Ito¹,

Adamek²,

Callahan³

et al. 2018

Phys. Rev. C

View full text Add to dashboard Cite

The ultracold neutron (UCN) source at Los Alamos National Laboratory (LANL), which uses solid deuterium as the UCN converter and is driven by accelerator spallation neutrons, has been successfully operated for over 10 years, providing UCN to various experiments, as the first production UCN source based on the superthermal process. It has recently undergone a major upgrade. This paper describes the design and performance of the upgraded LANL UCN source. Measurements of the cold neutron spectrum and UCN density are presented and compared to Monte Carlo predictions. The source is shown to perform as modeled. The UCN density measured at the exit of the biological shield was 184(32) UCN/cm 3 , a four-fold increase from the highest previously reported. The polarized UCN density stored in an external chamber was measured to be 39(7) UCN/cm 3 , which is sufficient to perform an experiment to search for the nonzero neutron electric dipole moment with a one-standard-deviation sensitivity of σ(dn) = 3 × 10 −27 e·cm.

show abstract

“…Scattering functions and cross sections for both orthoand para-Deuterium have been evaluated for temperatures ranging from the freezing point (18.7 K) down to 5 K. The new model has been compared with the best available experimental data, showing a highly satisfactory agreement [24].…”

Section: Discussionmentioning

confidence: 99%

Development of Cold Neutron Scattering Kernels for Advanced Moderators

Granada¹,

Cantargi²

2010

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

The development of scattering kernels for a number of molecular systems was performed, including a set of hydrogeneous methylated aromatics such as toluene, mesitylene, and mixtures of those. In order to partially validate those new libraries, we compared predicted total cross sections with experimental data obtained in our laboratory. In addition, we have introduced a new model to describe the interaction of slow neutrons with solid methane in phase II (stable phase below T=20.4K, atmospheric pressure). Very recently, a new scattering kernel to describe the interaction of slow neutrons with solid Deuterium was also developed. The main dynamical characteristics of that system are contained in the formalism, the elastic processes involving coherent and incoherent contributions are fully described, as well as the spin-correlation effects.

show abstract

Neutron scattering kernel for solid deuterium

Cited by 12 publications

References 26 publications

Cold neutron scattering in imperfect deuterium crystals

Cold neutron scattering in imperfect deuterium crystals

Performance of the upgraded ultracold neutron source at Los Alamos National Laboratory and its implication for a possible neutron electric dipole moment experiment

Development of Cold Neutron Scattering Kernels for Advanced Moderators

Contact Info

Product

Resources

About