Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-28T13:39:23.806Z Has data issue: false hasContentIssue false
  • English
  • Français

Deuteron bombardment of the heavy elements.

I. Mercury, thallium and lead

Published online by Cambridge University Press:  24 October 2008

R. S. Krishnan  and
E. A. Nahum
R. S. Krishnan
Affiliation:
Cavendish LaboratoryCambridge
E. A. Nahum
Affiliation:
Cavendish LaboratoryCambridge
Get access Rights & Permissions [Opens in a new window]

Extract

The results of the bombardment of mercury, lead and thallium by 9 M.e.V. deuterons are reported. The following radioactive isotopes have been detected: 5·5 min., 48 min., 36 hr., 60 day mercury isotopes; 4·4 min., 10·5 hr., 44 hr., and 13 day thallium isotopes; 10·25 min., 2·75 hr., and 54 hr. lead isotopes; 18 hr. and 6·35 day bismuth isotopes. The 10·25 min. lead isotope is positron emitting, an interesting result in an element of high atomic number. Absorption measurement have been made of the radiations emitted by many of these isotopes and assignments have been made in most cases.

In conclusion we wish to thank Dr N. Feather for valuable discussions, and also for making for us a Ra E source. We are indebted to Dr Lewis for advice in setting up the thyratron scale of eight counter. This paper would be incomplete without a sincere acknowledgement of our indebtedness to the hard work of past members of this laboratory who have been mainly responsible for setting up the cyclotron.

One of us (R. S. K.) is grateful to the Royal Commissioners for the Exhibition of 1851 for the grant of an overseas scholarship which made this work possible.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 36 , Issue 4 , October 1940 , pp. 490 - 499
Copyright
Copyright © Cambridge Philosophical Society 1940

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

(1)Thornton, and Cork, . Phys. Rev. 51 (1936), 383.Google Scholar
(2)Feather, . Proc. Cambridge Phil. Soc. 34 (1938), 599.CrossRefGoogle Scholar
(3)Heyn, . Nature, Lond., 139 (1937), 842.CrossRefGoogle Scholar
McMillan, , Kamen, and Ruben, . Phys. Rev. 52 (1937), 375.CrossRefGoogle Scholar
Pool, , Cork, and Thornton, . Phys. Rev. 52 (1937), 239.CrossRefGoogle Scholar
(4)Alvarez, . Phys. Rev. 54 (1938), 486.CrossRefGoogle Scholar
(5)Krishnan, . Unpublished work.Google Scholar
(6)Feather, and Bretscher, . Nature, Lond., 143 (1939), 516.CrossRefGoogle Scholar
(7)Anderson, . Nature, Lond., 137 (1936), 457.CrossRefGoogle Scholar
McMillan, , Kamen, and Ruben, . Phys. Rev. 52 (1937), 375.CrossRefGoogle Scholar
(8)Bretscher, , Cook, and Krishnan, . Unpublished work. (See also Nature, Lond., 144 (1939), 46.)Google Scholar
(9)De Vries, and Diemer, . Physica, 6 (1939), 599.CrossRefGoogle Scholar