Protons from the Transmutation of Boron by Deuterons

Pollard, Ernest C.; Davidson, W.; Schultz, H. L.

doi:10.1103/physrev.57.1117

Cited by 12 publications

(2 citation statements)

References 7 publications

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“…Several proton groups have been observed 1,2 from reaction (1). The neutrons emitted in reactions (2), (4), and (5) have been observed 3,4 by both cloud chamber and photographic plates. It has not been possible to correlate all of the observed neutron groups with the disintegration of a specific isotope, although some assignments can be made from calculated limits of the (Rvalues.…”

Section: -Fmentioning

confidence: 99%

Deuteron Bombardment of Boron Isotopes

Hudspeth

Swann

1949

Phys. Rev.

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The excitation of curve for B ll (d,p) has been obtained by observing the intensity of the beta-rays from B 12 as a function of bombarding voltage from about 0.3 to 1.85 Mev. No resonance structure was observed in this region of bombardment. The yield at 1.47 Mev is approximately 10 7 beta-rays/microcoulomb of deuterons.The short-range protons which are formed in the above reaction were also observed in photographic plates, and range measurements showed that the Q-value of the reaction is 0.15 Mev. It is believed that this value does not represent the formation of B 12 in its ground state, however, but in an excited state at about 1.1 Mev. A group believed to be protons of higher energy (corresponding to Q=1.25 Mev) but of much lower intensity was subsequently observed.It was shown, by bombardment of enriched B 10 and of normal boron, that a gamma-ray of approximately 1.1 Mev energy is associated with the disintegration of B 11 by deuterons. It is therefore almost certain that this gamma-ray arises from the decay of B 12 to its ground state. Intensity measurements also indicate that this is the case.

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Section: -Fmentioning

confidence: 99%

Deuteron Bombardment of Boron Isotopes

Hudspeth

Swann

1949

Phys. Rev.

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“…summary It has already been indicated that the division of all known stable nuclei into groups of separate series according to their physical characteristics is lacking in continuity of species formation. However, with the aid of this division the ob- »i = 47.9651 (1), 48) Ii.E. = 0.4470 AB.E.…”

Section: Even-even-unequal Nucleimentioning

confidence: 99%