Zobrazeno 1 - 10
of 218
pro vyhledávání: '"PEPLOWSKI, Patrick N."'
Autor:
Hirata, Kaori, Usui, Tomohiro, Hyodo, Ryuki, Genda, Hidenori, Fukai, Ryota, Lawrence, David J., Chabot, Nancy L., Peplowski, Patrick N., Kusano, Hiroki
Publikováno v:
In Icarus 1 March 2024 410
Autor:
Wilson, Jack T., Lawrence, David J., Peplowski, Patrick N., Eke, Vincent R., Kegerreis, Jacob A.
We use data from the Lunar Prospector Neutron Spectrometer to make the second space-based measurement of the free neutron lifetime finding $\tau_n=887 \pm 14_\text{stat}{\:^{+7}_{-3\:\text{syst}}}$ s, which is within 1$\sigma$ of the accepted value.
Externí odkaz:
http://arxiv.org/abs/2011.07061
Free neutrons have a measured lifetime of 880 s, but disagreement between existing laboratory measurements of ~10 s have persisted over many years. This uncertainty has implications for multiple physics disciplines, including standard-model particle
Externí odkaz:
http://arxiv.org/abs/2011.06095
Autor:
Wilson, Jack T., Lawrence, David J., Peplowski, Patrick N., Eke, Vincent R., Kegerreis, Jacob A.
Publikováno v:
Phys. Rev. Research 2, 023316 (2020)
We establish the feasibility of measuring the neutron lifetime via an alternative, space-based class of methods, which use neutrons generated by galactic cosmic ray spallation of planets' surfaces and atmospheres. Free neutrons decay via the weak int
Externí odkaz:
http://arxiv.org/abs/2006.10008
A defining characteristic of the planet Venus is its thick, CO2-dominated atmosphere. Despite over fifty years of robotic exploration, including thirteen successful atmosphere probes and landers, our knowledge of N2, the second-most-abundant compound
Externí odkaz:
http://arxiv.org/abs/1911.05598
Autor:
Wilson, Jack T., Lawrence, David J., Peplowski, Patrick N., Cahill, Joshua T. S., Eke, Vincent R., Massey, Richard J., Teodoro, Luis F. A.
We present improved resolution maps of the Lunar Prospector Neutron Spectrometer thermal, epithermal and fast neutron data and Gamma-Ray Spectrometer Th-line fluxes via global application of pixon image reconstruction techniques. With the use of mock
Externí odkaz:
http://arxiv.org/abs/1802.09508
The chemical composition of a planetary body reflects its starting conditions modified by numerous processes during its formation and geological evolution. Measurements by X-ray, gamma-ray, and neutron spectrometers on the MESSENGER spacecraft reveal
Externí odkaz:
http://arxiv.org/abs/1712.02187
Publikováno v:
In Nuclear Inst. and Methods in Physics Research, A 11 April 2022 1029
Publikováno v:
In Nuclear Inst. and Methods in Physics Research, A 1 February 2021 988