What question did this study set out to answer?

To establish a high-precision method for measuring standard crystal lattice spacing and neutron-related fundamental physical constants using back-reflection time-of-flight techniques.

December 1, 1968Journal of Physics E Scientific InstrumentsOpen Access

Proposal for a new determination of a standard lattice spacing

View Full Paper

Ask AI

Bookmark

Authors

RSR. StedmanLund University

Discussion

Member takes

Implication

Methodological proposal demonstrates high-precision lattice spacing determination in crystals using vibrating reflectors, indicating feasibility to achieve one part-per-million accuracy.

Key Points

To establish a high-precision method for measuring standard crystal lattice spacing and neutron-related fundamental physical constants using back-reflection time-of-flight techniques.
Configured two parallel, disk-shaped crystals placed meters apart in an intense neutron beam for backward Bragg reflection into a detector.
Applied synchronous sinusoidal vibrations to both crystals to velocity-modulate reflected neutrons and tune reflection acceptance.
Evaluated peak intensity spacing by shifting the second crystal's position across distances of up to 10 m under controlled vibration frequencies.
Measuring peak positions across a 10 m distance to within 0.01 mm yields an absolute lattice spacing determination accuracy within approximately 1 part per million.
Theoretical evaluations of crystal dimensions, vibration frequency, beam intensity, and background noise confirm the practical feasibility of the experimental design.

Cite This Study

R. Stedman (1968) studied this question.

synapsesocial.com/papers/6a96a415c00de92d9bfbc6bf https://doi.org/10.1088/0022-3735/1/12/306

View Full Paper

Ask AI

Bookmark

Implication

Methodological proposal demonstrates high-precision lattice spacing determination in crystals using vibrating reflectors, indicating feasibility to achieve one part-per-million accuracy.

Proposal for a new determination of a standard lattice spacing

Discussion

Member takes

Implication

Key Points

Cite This Study

Proposal for a new determination of a standard lattice spacing

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider