Cosmic-Ray Neutron Energy Spectrum
Open accessAbstract
The cosmic-ray neutron energy spectrum in the equilibrium region of the atmosphere has been measured with several different calibrated detectors from thermal energies to about 1 Bev at 44\ifmmode^\circ\else\textdegree\fi{} north magnetic latitude and up to 40 000 feet. By combination of the data from these measurements with those from other experiments, a complete differential energy spectrum is obtained which shows the characteristic maximum near thermal energies and a roughly $\frac{1}{E}$ variation up to about 100 kev. The presence of a second maximum in the spectrum near 1 Mev is attributed to the evaporation neutrons from stars, and above this energy up to 800 Mev the spectrum falls off as ${E}^{\ensuremath{-}1.4}$.
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Interactions of Galactic Cosmic Ray ions produce neutrons over a broad energy range, from eV to GeV.
“Interactions of GCR ions produce neutrons over a broad energy range, from eV to GeV [Hess et al., 1959].”
From Measurements of the neutron spectrum on the Martian surface with MSL/RAD (2014) · cites this paper as Hess et al., 1959
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Measurements of the neutron spectrum on the Martian surface with MSL/RAD
Köhler, J., Zeitlin, C., Ehresmann, B., Wimmer‐Schweingruber, R. F., Hassler, D. M., Reitz, G., Brinza, D. E., Weigle, G., Appel, J., Böttcher, S., et al. (2014) · Journal of Geophysical Research: Planets · doi:10.1002/2013je004539 · Cited by 71 · see citing works
- Authors
- Hess, W. N., Patterson, H. W., Wallace, R., & Chupp, E. L.
- Affiliations
- Lawrence Berkeley National Laboratory (US)
- Lawrence Livermore National Laboratory (US)
- Venue
- Physical Review
- Publisher
- American Physical Society (APS)
- Published
- 1959-10-15
- Volume
- 116
- Issue
- 2
- Pages
- 445-457
- ISSN
- 0031-899X (ISSN-L)
- OpenAlex
- W1990048133
- Cited by
- 229
- References
- 0
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 3 · 2023: 6 · 2022: 1 · 2021: 4 · 2020: 5 · 2019: 1 · 2018: 6 · 2017: 4 · 2016: 4 · 2015: 4 · 2014: 7 · 2013: 9 · 2012: 5
- FWCI
- 7.44
- Type
- journal article
- Language
- en
- Open access
- green
- www.escholarship.org
- Locations
- Physical Review (publishedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Astrophysics and Cosmic Phenomena
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Neutrino Physics Research
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Radiation Therapy and Dosimetry
- Keywords
- cosmic ray neutrons, energy spectrum, differential energy spectrum, evaporation neutrons
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