SLOW-NEUTRON INTENSITY AT HIGH BALLOON ALTITUDES

Journal Article · Tue Nov 15 04:00:00 EST 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.120.1460· OSTI ID:4144773

Haymes, R C; Korff, S A

In order to extend measurements of cosmic neutrons to top balloon altitudes, a flight was conducted on August 24, 1959, in which a system of identical counters filled with enriched and natural B/sup 10/F/sub 3/ was used. An altitude of 122,000 ft at a geomagnetic latitude of 55 deg N was attained, corresponding to 4-mb pressure, which is considerably higher than previous measurements. The counting rate dropped to about 1% of the maximum rate, which occurs at 60,000 ft. If this curve is extrapclated to the top of the atmosphere, an upper bound for the slow-neutron albedo of 0.03 neutron per cm/sup 2/-sec is obtained. The background owing to highly ionizing events in the counters increased

• Research Organization: New York Univ., New York
• NSA Number: NSA-15-003297
• OSTI ID: 4144773
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 120; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALBEDO
BALLOONS
BORON COMPOUNDS
COSMIC RADIATION
COUNTERS
IONIZATION
MEASURED VALUES
NEUTRONS
PHYSICS
THERMAL NEUTRONS