Transmutations with high energy deuterons and helium ions in the 184-inch cyclotron

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Material Information

Title:
Transmutations with high energy deuterons and helium ions in the 184-inch cyclotron
Series Title:
United States. Atomic Energy Commission. MDDC ;
Physical Description:
2 p. : ill. ; 27 cm.
Language:
English
Creator:
Cunningham, B. B
University of California
U.S. Atomic Energy Commission
Publisher:
Technical Information Division, Oak Ridge Operations
Place of Publication:
Oak Ridge, Tenn
Publication Date:

Subjects

Subjects / Keywords:
Helium ions   ( lcsh )
Deuterons   ( lcsh )
Genre:
federal government publication   ( marcgt )
non-fiction   ( marcgt )

Notes

Bibliography:
Includes bibliography references : p. 2.
Statement of Responsibility:
by B.B. Cunningham ... et al..

Record Information

Source Institution:
University of Florida
Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 005023511
oclc - 277228048
System ID:
AA00008525:00001

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MDDC-994

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UNITED STATES
ATOMIC ENERGY COMMISSION
OAK RIDGE
TENNESSEE





TRANSMUTATIONS WITH HIGH ENERGY

DEUTERONS AND HELIUM IONS IN THE 184-INCH CYCLOTRON


by


B. B. Cunningham


R. C.


Thompson


P. R. O'Connor


G. T.


Seaborg


H. H. Hopkins
D. R. Miller
M. Lindner
I. Perlman


University of California


or use within the Atomic Energy Commission. Inquiries for additional copies
rilons regarding reproduction by recipients of this document may be referred


nical Information Division, Atomic Energy Commission, P.


O. Box E


, Oak Ridge,


s a declassified document may differ materially from the original classified


poctiment by reason of deletions necessary to accomplish declassification, this copy does
g|not constitute authority for declassification of classified copies of a similar document which
'iiuay bear the same title and authors.
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April 28,


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e of Manuscript:


lo6ument Declassifiedc


:This document consists of 2 pages.


7,, -.,-ronqiQTORY


May 15,


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MDDC-994


TRANSMUTATIONS WITH HIGH ENERGY
DEUTERONS AND HELIUM IONS IN THE 184-INCH CYCLOTRON


By B. B. Cunningham, H. H. Hopkins, M. Lindner, D. R. Miller, P. R. O'Connor,
I. Perlman, G. T. Seaborg, and R. C. Thompson


The successful operation1 of the Berkeley 184-inch cyclotron to produce useful beams
of deuterons and helium ions of approximately 200 and 400 Mev, respectively, has made


possible the radiochemical identification of many of the tr
excited to very high energies. Products with considerably
target were observed in all cases. For example, with 200
ities were found representative of all elements from 34Se
not excluded. Both negative beta-particle and positron (or
ities are noted, indicating reactions both of multiple neutr
particle ejection. For example with deuterons on ySb121
and 2.5-day 48Cd115 were produced and with 33As%5 cobal
to 27Co55 or 27Co54 (-12 Hr.) and 27Co61 (n1.8 Hr.) 2w


ansmutation products of nuclei
lower atomic number than the
Mev deuterons on 33As75 activ-
to 25Mn with lower elements
orbital electron capture) activ-
on ejection and multiple charged
and 123 both 6.7-hour 48Cd107
It activities tentatively assigned
ere found.


For the formation of light isotopes, several different reactions are possible since in
most cases the products will not be shielded from formation through a chain of short-lived
* positron (or orbital electron capture) ancestors following the ejection of different combi-
nations of. neutrons and charged particles in the primary reaction. As an example from
deuterons on 29Cu63 ad 65, the formation of a new 8-hour iron positron emitter assigned
- to 26Fe52 may be represented by the expression, Cu63(d,4zl3a)Fe52, which indicates that
Four units of charge and thirteen mass units are lost in arriving at the product. In the case
of the heavier isotopes it may be possible to write somewhat more definite reactions of
the type Sbl2(d,2a2n)Cd115 and As5(d,p3a3n)Co61, although negative beta-particle emit-
ting parents are certainly possible.


Uranium was bombarded with 400 Mev helium ions
identified both in the heavy element region and in the
resentative of the heavy isotopes observed were 88Ra
The fission product distribution is characterized by a
ima than is the case for slow neutron fission, and the
slon products are much higher.


and a wide range of
region of the fission
223(AcX), 88Ra224(T
much shallower dip
yields of the lights


activities were
products. Rep-
hX), and 85At211
between the max-
t observed fis-


The various aspects of this work will be published more fully by the individual groups
of investigators.








-2-







REFERENCES


1. W. M. Brobeck, E. O. Lawrence, K. R. MacKenzie, E.


MDDC-994


M. McMillan, R. Serber,


D. C. Sewell, K. M. Simpson, and R. L. Thornton, Phys. Rev; 71, 449 (1947).


T. J. Parmley and B. J. Moyer, Abstract No. E6, this meeting of Am. Phys. Soc.


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