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The disintegration of boron by α-particles

Published online by Cambridge University Press:  24 October 2008

H. Miller ,
W. E. Duncanson  and
A. N. May
H. Miller
Affiliation:
St John's College
W. E. Duncanson
Affiliation:
Trinity College
A. N. May
Affiliation:
Trinity Hall
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Extract

The protons emitted from boron, when it is bombarded by α-particles from radium C′ and polonium, have been examined. All have been ascribed to the disintegration of the B10 isotope following the capture of an α-particle. Four energy changes with values 3·1 m.v., 0·4 m.v., − 0·1 m.v., and − 1·0 m.v. are necessary to explain the range distribution observed. Experiments with α-particles from polonium also show that penetration through the top of the potential barrier stops at an energy of 3·6 m.v. and that below this there is a resonance level at about 2·9 m.v.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 30 , Issue 4 , October 1934 , pp. 549 - 560
Copyright
Copyright © Cambridge Philosophical Society 1934

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References

* Duncanson, and Miller, , Proc. Roy. Soc. 146, 398 (1934).CrossRefGoogle Scholar

† Bothe, , Zeit. f. Phys. 63, 381 (1930).CrossRefGoogle Scholar

‡ Franz, , Zeit. f. Phys. 63, 370 (1930).CrossRefGoogle Scholar

§ Chadwick, Constable and Pollard, , Proc. Roy. Soc. 130, 463 (1931).CrossRefGoogle Scholar || Heidenreich, , Zeit. f. Phys. 86, 675 (1933).CrossRefGoogle Scholar

Throughout this paper m.v. will be used to denote million electron volts.

** Wynn-Williams, and Ward, , Proc. Roy. Soc. 131, 391 (1931).CrossRefGoogle Scholar

* Chadwick, Constable and Pollard, , Proc. Roy. Soc. 130, 463 (1931)CrossRefGoogle Scholar; Chadwick, and Constable, , Proc. Roy. Soc. 135, 48 (1932).CrossRefGoogle Scholar

† Duncanson and Miller, loc. cit.

* Duncanson, , Proc. Camb. Phil. Soc. 30, 102 (1934).CrossRefGoogle Scholar

* Heidenreich, , Zeit. f. Phys. 86, 675 (1933).CrossRefGoogle Scholar

† Paton, Recently (Zeit. f. Phys. 90, 586 (1934))CrossRefGoogle Scholar, using α-particles from thorium C′ has also obtained evidence for a short-range group with Q = − 1·68 m.v. Otherwise the results given in Table II (p. 555) are in agreement with his, except that he has not obtained a group with Q = − 0·1 m. v.

* We are indebted to Dr Chadwick for permission to use these unpublished results.

* Becker, and Bothe, , Zeit. f. Phys. 76, 421 (1932).CrossRefGoogle Scholar

* Pollard, , Phys. Rev. 45, 555 (1934).CrossRefGoogle Scholar

* Chadwick, Constable and Pollard, , Proc. Roy. Soc. 130, 463 (1931).CrossRefGoogle Scholar

* Chadwick, , Proc. Roy. Soc. 142, 1 (1933).CrossRefGoogle Scholar

† Bonner, and Mott-Smith, , Phys. Rev. 45, 554 (1934).Google Scholar

‡ Chadwick, and Goldhaber, , Nature, 134, 237 (1934).CrossRefGoogle Scholar