Neutron mass: Measurement of the H1(n,γ)H2 γ ray and revised values for selected neutron binding energies

R. C. Greenwood and R. E. Chrien
Phys. Rev. C 21, 498 – Published 1 February 1980
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Abstract

The H1(n,γ)H2 reaction γ-ray energy was obtained from measurement of the energy difference between it and the 2185-keV γ ray emitted in the β decay of Ce144-Pr144. Based on the γ-ray energy value of 2223.247 ± 0.017 keV obtained from this measurement, a value of 2224.564 ± 0.017 keV was determined for the binding energy of the deuteron Sn(H2). By combining this binding energy value with published mass differences of doublets involving neighboring isotopes and H1 and H2, values of 6257.268 ± 0.024, 4946.329 ± 0.024, 8176.483 ± 0.040, and 10833.297 ± 0.038 keV were obtained for the neutron binding energies of H3, C13, C14, and N15, respectively, together with a value of 8071.367 ± 0.029 keV for the neutron mass excess n1.

NUCLEAR REACTIONS H1(n,γ), E=thermal; measured Eγ. Deduced neutron binding energies for H2, H3, C13, C14, and N15; deduce neutron mass. Natural targets, Ge semiconductor detectors.

  • Received 24 August 1979

DOI:https://doi.org/10.1103/PhysRevC.21.498

©1980 American Physical Society

Authors & Affiliations

R. C. Greenwood

  • Idaho National Engineering Laboratory, E.G. and G. Idaho, Inc., Idaho Falls, Idaho 83401

R. E. Chrien

  • Brookhaven National Laboratory, Upton, New York 11973

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Vol. 21, Iss. 2 — February 1980

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