Transmutations of Nitrogen by Deutons

Ernest O. Lawrence, Edwin McMillan, and Malcolm C. Henderson
Phys. Rev. 47, 273 – Published 15 February 1935
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Abstract

Nitrogen bombarded by deutons emits three alpha-particle and two proton groups. For deutons of maximum energy 1.4 mv traversing an air target the alpha-particle groups have ranges of 6.9, 7.8 and 12.7 cm. The reaction involved is N14+D2C12+He4, and the transmutation energy, derived from the long range group, in conjunction with the precise mass spectrograph determinations of D2, He4 and C12 yields for the mass of N14 the value 14.0069. The 6.9 and 7.8 cm groups indicate the existence of excited levels in C12 at 3.8 and 4.7 mv. The proton groups from a thin air target bombarded by 1.25 mv deutons have ranges of 24 and 85 cm. The reaction involved is N14+D2N15+H1. The transmutation energy of this reaction yields for the mass of N15 the value 15.0041. The 24 cm group indicates an excitation level in N15 at 4.7 mv. For 1.2 mv deutons, the effective nuclear collision cross sections for the alpha-particle and proton reactions are about 1027 cm2 and 3 × 1029 cm2, respectively.

  • Received 2 January 1935

DOI:https://doi.org/10.1103/PhysRev.47.273

©1935 American Physical Society

Authors & Affiliations

Ernest O. Lawrence, Edwin McMillan, and Malcolm C. Henderson

  • Radiation Laboratory, Department of Physics, University of California

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Issue

Vol. 47, Iss. 4 — February 1935

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