Time-of-flight spectrometer for neutrons from about 150 MeV to 1 GeV

Journal Article · Tue Jan 01 04:00:00 EST 1974 · Nucl. Instrum. Methods, v. 114, no. 3, pp. 483-487

DOI:https://doi.org/10.1016/0029-554X(74)90170-0· OSTI ID:4348050

Madey, R; Waterman, F M

A modified version of a time-of-flight spectrometer developed previously for neutrons from 1 to 500 MeV achieves a substantial reduction in backgrounds and permits extension of the upper energy limit to 1 GeV or perhaps higher. Basically, the spectrometer measures the time-of-flight of a neutron scattered elastically between two scintillation counters. The addition of a counter telescope to detect the recoil-proton from a neutron-proton elastic scattering event in the first detector results in a substontial reduction in back-rounds from competing inelastic neutron-carbon and neutron-proton reactions and from chance coincidences; however, since the recoil protons must escape the first detector, the spectrometer becomes increasingly inefficient below about 175 MeV. The modified spectrometer was used to measure the neutron spectrum at 0 deg from beryllium bombarded by the circulating beam of 724 MeV protons in the 184" cyclotron at the Lawrence Berkeley Laboratory. This measurement demonstrated the ability of the spectrometer to measure neutrons to about 724 MeV and confirms the calculated energy resolution of the spectrometer. (auth)

• Research Organization: Kent State Univ., OH
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-021000
• OSTI ID: 4348050
• Journal Information: Nucl. Instrum. Methods, v. 114, no. 3, pp. 483-487, Journal Name: Nucl. Instrum. Methods, v. 114, no. 3, pp. 483-487; ISSN NUIMA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*NEUTRON SPECTROMETERS-- PERFORMANCE
ELASTIC SCATTERING
ENERGY RESOLUTION
LIQUID SCINTILLATION DETECTORS
MEV RANGE
N46130* --Instrumentation--Radiation Detection Instruments-- Nuclear Spectroscopic Instrumentation
PLASTIC SCINTILLATION DETECTORS
PROTON RECOIL DETECTORS
TIME-OF-FLIGHT SPECTROMETERS