A 0. 5 to 3. 0 MeV monoenergetic positron beam Page: 3 of 3
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ACKNOWLEDGEMENTS
1. E. Gramsclh, .1. Throwe and K.G. Lynn,
Apple. Phiys. Lett. 51, 162 (1987).
2. K.F. Canter, Postron Studies of
Solids, Surfaces and Atoms, ed. by
A.P. Mllis,Jr., U.S. Crane and K.F.
Canter, (World Scientific, Singapore)
1986.This work is supported by US DOE Contracts
DE-AC02-76C100016 and DE-AC02-76ER3U74.
* Visiting from Laboratory of Physics,
Helsinki University of Technology, SF-02150
E 5200.Table 1. Beam characteri[sti js of the 3 MoV positron beam at BNL
Source total activity encapsulated................................... -70 mCi
Moderator efficiency (fast positron in, moderated positron out)...... 5x1U4
Total transport effri1ionry.................. ....... .................. .90%
Positrou flux at target.............................................. 3x1U5e+/s
High energy cow tta mtnatio.il........................................... <10 e+/s
Beam size (diameter)................................................. -1.1 mn FUH 02.2 MeV
leam divergence...................................................... <0.1*
eam energy.......................................................... <1 keV FWUN 02.2 MeV
Accuracy of beast energy measurement................................... 100 eV
Usable energy range from............................................. 0.5 MeV to 3.0 NoV
The constructed positron beam will be initially used for a Brookhaven--CCNY--Yale
collaboration for a search of resonant hIhablia scattering.
experiment.
DISCLAIMER
This report was prepared as an account of work sponsored by an agency of the United States
Government. Neither the United States Government nor any agency thereof, nor any of their
employees, makes any warranty, express or implied, or assumes any legal liability or responsi-
bility for the accuracy, completeness, or usefulness of any information, apparatus, product, or
process disclosed, or represents that its use would not infringe privately owned rights. Refer-
ence herein to any specific commercial product, process, or service by trade name, trademark,
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mendation, or favoring by the United States Government or any agency thereof. The views
and opinions of authors expressed herein do not necessarily state or reflect those of the
United States Government or any agency thereof.PREFERENCES
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Huomo, H.; AsokaKumar, P.; Henderson, S. D.; Phlips, B. F.; Mayer, R.; McDonough, J. et al. A 0. 5 to 3. 0 MeV monoenergetic positron beam, article, 1988~; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc1185562/m1/3/: accessed June 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.